Release 1.1.0.0 with RSS feeds and static pages

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Revision history for hablo
 
+## 1.1.0.0 -- 2020-12-13
+
+* Implement static pages
+* Implement RSS feeds
+* Use SJW to pack JS into a single script and simplify deployment
+
 ## 1.0.3.0 -- 2019-12-21
 
 * Fix OpenGraph cards displayed for links to hablo-generated pages posted on the Fediverse (should work elsewhere too but I don't care and have never tested)

README.md

@@ -20,6 +20,16 @@ cabal new-install hablo
 
 Alternatively, if you prefer to do things yourself you can do a
 
+#### Simple install with nix
+
+Want to give hablo a quick try using nix ?
+
+```bash
+nix-env -f 'https://git.marvid.fr/Tissevert/mynixpkgs/archive/main.tar.gz' -i hablo
+```
+
+Visit my [Nix packages](https://git.marvid.fr/Tissevert/mynixpkgs) for a more declarative setup.
+
 #### Manual install from this repository
 
 Get a copy of this repository
@@ -40,6 +50,18 @@ Install the result
 cabal new-install hablo
 ```
 
+### Dependencies
+
+Hablo requires [UnitJS](https://git.marvid.fr/Tissevert/UnitJS) which is handled by [SJW](https://git.marvid.fr/Tissevert/SJW). Make sure you have installed it regularly with `SJW`. If it isn't yet, the following commands should help you:
+
+```bash
+cd /tmp
+git clone https://git.marvid.fr/Tissevert/UnitJS.git
+cd UnitJS
+mkdir -p ~/.sjw
+cp -r src/ ~/.sjw/unitJS
+```
+
 ### Using hablo (tutorials)
 
 Wanna give it a try ? Start by [generating your blog](https://git.marvid.fr/Tissevert/hablo/wiki/Generating%20your%20blog)

doc/Command-line.md

@@ -32,6 +32,8 @@ hablo --articles turtles /path/to/your/blog
 
 See ? It was still `turtles` and not ~~`/path/to/your/blog/turtles`~~.
 
+Also note that articles are partly optional : you can use hablo to generate a website with a fix content and no articles. In that case, just make sure no directory named `articles/` exists at the root of your website (see [pages](#pages-path)) and keep in mind that it should have static pages (hablo, just like other famous entities should not be invoked in vain and will exit in error suspecting something went wrong when invoked on an empty website with no articles and no pages, which to it means nothing to do).
+
 ## Banner
 
 `-b, --banner`
@@ -116,11 +118,25 @@ hablo --name "Turtles/Paradize"
 
 Enables Open Graph cards in pages to display a pretty preview of them instead of the raw URL in links posted to social media. Note that this feature requires setting your site URL with [`--site-url`](#site-url).
 
-## Pages
+## Pages path
 
 `-p, --pages`
 
-This option doesn't work yet but hablo will support static pages in addition to articles in a future release. Like [articles](#article-path), they will be expected to be located in a sub-directory called `pages/` but this option will allow you to use an arbitrary path within your blog's structure.
+In addition to «dynamic» lists of articles that grow over time, hablo supports «static» pages to allow you to publish relatively constant information related to your blog. Pages are expected to be located in a sub-directory called `pages/` but this option will allow you to use an arbitrary path within your blog's structure.
+
+So if for instance your blog is for a community of authors and a presentation of each of them is all you want to publish as «static» content, you could have this directory called «authors» and run `hablo` like this :
+
+```bash
+hablo --pages authors
+```
+
+This option is very similar to the one for [articles](#articles-path). Like the articles path, the pages path is of course relative to the blog's root. Pages are also partly optional : you don't have to have static pages in your blog in which case you should just make sure no directory named `pages/` exists at the root of your website and you have articles (because like we said above hablo is highly suspicious of being invoked to perform no work and will suspect this is a mistake and report it as an error).
+
+Final tip : if you're using hablo to edit a static website with no articles, then you probably don't want to put your pages in a sub-directory but have them at the root of your website instead. This is possible, just remember that the current directory is called `.` in UNIX and run :
+
+```bash
+hablo -p .
+```
 
 ## Number of articles previewed 
 

doc/Deploying-a-hablo-blog.md

@@ -1,6 +1,6 @@
 # Deployment
 
-Since hablo generates static blogs, deployment is a fairly easy step. The only detail to pay attention to is the handling of dependencies.
+Since hablo generates static blogs, deployment is a fairly easy step. The only detail to pay attention to is the handling of JS dependencies.
 
 We show here a simple local deployment of your blog assuming you use NGinx but this is fairly easy to transpose to your favourite web server. First let's create an NGinx configuration file for your blog. Let's put the following basic configuration
 
@@ -29,30 +29,11 @@ sudo nginx -s reload
 
 Now let's install the dependencies.
 
-## UnitJS
-
-Hablo requires [UnitJS](https://git.marvid.fr/Tissevert/UnitJS). Go to some temporary work directory, clone it and generate the packed JS module.
-
-```bash
-cd /tmp
-git clone https://git.marvid.fr/Tissevert/UnitJS.git
-cd UnitJS
-make
-```
-
-It's in `dist/unit.js`. Let's go back to your blog's directory and copy it.
-
-```bash
-cd "/path/to/My perfect life is better than yours"
-mkdir -p js
-cp /tmp/UnitJS/dist/unit.js js
-```
-
 ## Remarkable
 
 The markdown is converted to HTML in the client browser with the JS library [remarkable](https://github.com/jonschlinkert/remarkable).
 
-We can simply download it in your `js` directory.
+We can simply download it in the `js` subdirectory of your blog hablo created when you first invoked it.
 
 ```bash
 wget 'https://cdnjs.cloudflare.com/ajax/libs/remarkable/1.7.1/remarkable.min.js' -O js/remarkable.min.js

doc/Generating-your-blog.md

@@ -25,7 +25,7 @@ EOF
 
 Ok, ok, not everyone uses heredocs to write their articles. Personally I don't. You're writing a blog so you probably already have a favourite text editor; use it. The only thing I care about is, at this point, that you've created the file `Olive\ ridley\ sea\ turtle.md` in the `articles` directory with some markdown content in it.
 
-Ready ? Good news, we're almost done. The only thing left is to tag your first article. With hablo articles don't have to be put in a single category but they can be tagged this and that to indicate that they are somehow linked to one topic or another (they don't have to, you can perfectly leave an article untagged but the tags directory itself must exist). Tags live in a subdirectory of `articles`.
+Ready ? Good news, we're almost done. The only thing left is to tag your first article. With hablo articles don't have to be put in a single category but they can be tagged this and that to indicate that they are somehow linked to one topic or another (they don't have to, you can perfectly leave an article untagged). Tags live in a subdirectory of `articles`.
 
 ```bash
 mkdir -p articles/tags/Sea\ turtles

hablo.cabal

@@ -3,16 +3,16 @@ cabal-version:       >= 1.10
 -- For further documentation, see http://haskell.org/cabal/users-guide/
 
 name:                hablo
-version:             1.0.3.0
+version:             1.1.0.0
 synopsis:            A minimalist static blog generator
 description:
   Hablo is a fediverse-oriented static blog generator for articles written
   in Markdown. It tries to generate as little HTML as needed and uses
   Javascript to implement dynamic features in the browser.
 
-  Those features include the handling of comments and a cached navigation
-  to minimize the queries to the server. Hablo also generate cards for all
-  pages, including articles for prettier shares on social-networks.
+  Those features include the handling of comments and a cached navigation to
+  minimize the number of queries to the server. Hablo also generates RSS feeds
+  and Open Graph cards for prettier shares on social networks.
 homepage:            https://git.marvid.fr/Tissevert/hablo
 -- bug-reports:
 license:             BSD3
@@ -27,9 +27,8 @@ data-dir:            share
 data-files:          js/*.js
                      defaultWording.conf
 
-executable hablo
-  main-is:             Main.hs
-  other-modules:       Arguments
+library
+  exposed-modules:     Arguments
                      , Article
                      , ArticlesList
                      , Blog
@@ -45,25 +44,69 @@ executable hablo
                      , HTML
                      , JS
                      , JSON
+                     , Markdown
+                     , Page
                      , Paths_hablo
                      , Pretty
                      , RSS
   -- other-extensions:
-  build-depends:       aeson >= 1.4.0 && < 1.5
-                     , base >= 4.9.1 && < 4.14
-                     , bytestring >= 0.10.8 && < 0.11
+  build-depends:       aeson >= 1.4.0 && < 1.6
+                     , base >= 4.9.1 && < 4.15
+                     , bytestring >= 0.10.8 && < 0.12
                      , containers >= 0.5.11 && < 0.7
                      , directory >= 1.3.1 && < 1.4
                      , filepath >= 1.4.2 && < 1.5
                      , lucid >= 2.9.11 && < 2.10
                      , mtl >= 2.2.2 && < 2.3
-                     , optparse-applicative >= 0.14.3 && < 0.16
+                     , optparse-applicative >= 0.14.3 && < 0.17
                      , parsec >= 3.1.13 && < 3.2
                      , template >= 0.2.0 && < 0.3
                      , text >= 1.2.3 && < 1.3
-                     , time >= 1.8.0 && < 1.10
+                     , time >= 1.8.0 && < 1.12
                      , SJW >= 0.1.2 && < 0.2
                      , unix >= 2.7.2 && < 2.8
-  ghc-options:         -Wall -dynamic
+  ghc-options:         -Wall
   hs-source-dirs:      src
   default-language:    Haskell2010
+
+executable hablo
+  main-is:             src/Main.hs
+  other-modules:       Paths_hablo
+  -- other-extensions:
+  build-depends:       base >= 4.9.1 && < 4.15
+                     , hablo
+                     , mtl >= 2.2.2 && < 2.3
+  ghc-options:         -Wall
+  default-language:    Haskell2010
+
+test-suite tests
+  type:                detailed-0.9
+  test-module:         Tests
+  other-modules:       Mock.Arguments
+                     , Mock.Article
+                     , Mock.ArticlesList
+                     , Mock.Blog
+                     , Mock.Blog.Path
+                     , Mock.Blog.Skin
+                     , Mock.Blog.Template
+                     , Mock.Blog.URL
+                     , Mock.Blog.Wording
+                     , Mock.Collection
+                     , Mock.Markdown
+                     , Structure
+                     , Utils
+                     , XML.Card
+                     , XML.Card.Component
+                     , XML.Card.Output
+  build-depends:       base
+                     , Cabal
+                     , containers
+                     , directory
+                     , filepath
+                     , hablo
+                     , lucid
+                     , mtl
+                     , text
+  hs-source-dirs:      test
+  ghc-options:         -Wall
+  default-language:    Haskell2010

share/defaultWording.conf

@@ -1,11 +1,14 @@
 allLink = See all
 allPage = All articles{? tagged ${tag}?}
+articleDescription = A new article on ${name}
 commentsLink = Comment on the fediverse
 commentsSection = Comments
 dateFormat = en-US
 latestLink = See only latest
 latestPage = Latest articles{? tagged ${tag}?}
 metadata = {?by ${author} ?}on ${date}{? tagged ${tags}?}
+pageDescription = Read on ${name}
+pagesList = Pages
 rssLink = Subscribe
 rssTitle = Follow all articles{? tagged ${tag}?}
 tagsList = Tags

share/js/DomRenderer.js

@@ -6,20 +6,21 @@ import * as Dom from UnitJS.Dom;
 import {defined} from UnitJS.Fun;
 
 return {
-  article: article,
   articlesList: articlesList,
+  render: render,
   replaceMarkdown: replaceMarkdown
 };
 
 function replaceMarkdown() {
   var div = document.getElementById('contents');
   if(div.children[0] && div.children[0].tagName.toLowerCase() == 'article') {
-    convertArticle(div.children[0], true);
+    var contentType = window.location.pathname.slice(1).replace(/\/.*/, '');
+    convertContent(contentType, div.children[0], true);
   } else {
     var articles = div.getElementsByClassName('articles')[0];
     if(articles != undefined) {
       for(var i = 0; i < articles.children.length; i++) {
-        convertArticle(articles.children[i]);
+        convertContent('article', articles.children[i]);
       }
     } else {
       console.log('No articles found for this page');
@@ -27,13 +28,15 @@ function replaceMarkdown() {
   }
 }
 
-function convertArticle(article, comments) {
+function convertContent(contentType, article, comments) {
   var header = article.getElementsByTagName('header')[0];
-  header.appendChild(Metadata.get(article.id));
+  if(contentType == 'article') {
+    header.appendChild(Metadata.get(article.id));
+  }
   var text = article.getElementsByTagName('pre')[0];
   if(text != undefined) {
     article.replaceChild(getDiv(text.innerText), text);
-    if(comments) {
+    if(contentType == 'article' && comments) {
       Metadata.getComments(article.id)
         .forEach(article.appendChild.bind(article));
     }
@@ -56,19 +59,33 @@ function getDiv(markdown) {
   return d;
 }
 
-function article(key, markdown, limit) {
-  var url = ["", blog.path.articlesPath, key + (limit != undefined ? '.html' : '.md')].join('/');
-  var lines = markdown.split(/\n/).slice(blog.articles[key].bodyOffset);
+function contentUrl(contentType, key, limit) {
+  var directory = blog.path[contentType + 'sPath'];
+  var extension = limit != undefined ? '.html' : '.md';
+  return ["", directory, key + extension].join('/');
+}
+
+function commentsSection(contentType, key, limit) {
+  if(contentType != 'article' || limit != undefined) {
+    return [];
+  } else {
+    return Metadata.getComments(key);
+  }
+}
+
+function render(contentType, key, markdown, limit) {
+  var url = contentUrl(contentType, key, limit);
+  var resource = blog[contentType + 's'][key];
+  var lines = markdown.split(/\n/).slice(resource.bodyOffset);
   var div = getDiv(lines.slice(0, limit).join('\n'));
   return Dom.make('article', {}, [
     Dom.make('header', {}, [
-      Dom.make('a', {href: url}, [
-        Dom.make('h1', {innerText: blog.articles[key].title})
-      ]),
-      Metadata.get(key)
-    ]),
+      Dom.make('h1', {}, [
+        Dom.make('a', {href: url, innerText: resource.title})
+      ])].concat(contentType == 'article' ? Metadata.get(key) : [])
+    ),
     div
-  ].concat(limit != undefined ? [] : Metadata.getComments(key)));
+  ].concat(commentsSection(contentType, key, limit)));
 }
 
 function pageTitle(tag, all) {

share/js/Navigation.js

@@ -1,25 +1,29 @@
-import {article, articlesList} from DomRenderer;
+import {articlesList, render} from DomRenderer;
 import blog from Hablo.Config;
 import * as Async from UnitJS.Async;
 import * as Cache from UnitJS.Cache;
 import * as Dom from UnitJS.Dom;
 import * as Fun from UnitJS.Fun;
 
-var articles = Cache.make(function(key) {
-  var url = ["", blog.path.articlesPath, key + '.md'].join('/');
-  return Async.bind(
-    Async.http({method: 'GET', url: url}),
-    function(queryResult) {
-      if(queryResult.status == 200) {
-        return Async.wrap(queryResult.responseText);
-      } else {
-        return Async.fail(
-          "Could not load article " + url + " (" + queryResult.status + " " + queryResult.statusText + ")"
-        );
+var cache = {};
+['article', 'page'].forEach(function(contentType) {
+  cache[contentType] = Cache.make(function(key) {
+    var url = ["", blog.path[contentType + 'sPath'], key + '.md'].join('/');
+    return Async.bind(
+      Async.http({method: 'GET', url: url}),
+      function(queryResult) {
+        if(queryResult.status == 200) {
+          return Async.wrap(queryResult.responseText);
+        } else {
+          return Async.fail(
+            "Could not load " + contentType + " " + url + " (" + queryResult.status + " " + queryResult.statusText + ")"
+          );
+        }
       }
-    }
-  );
+    );
+  });
 });
+
 window.addEventListener('popstate', function(e) {
   if(e.state != undefined) {
     navigate(e.state.url);
@@ -60,27 +64,29 @@ function navigate(url) {
   if(blog.tags[path[0]] != undefined) {
     show(getArticlesList(path[0], path[1] == "all.html"));
   } else if(path[0] == blog.path.articlesPath) {
-    show(getArticle(path[1].replace(/\.html$/, '')));
+    show(getResource('article', path[1].replace(/\.html$/, '')));
+  } else if(path[0] == blog.path.pagesPath) {
+    show(getResource('page', path[1].replace(/\.html$/, '')));
   } else {
     show(getArticlesList(null, path[0] == "all.html"));
   }
 }
 
-function getArticle(key) {
+function getResource(contentType, key) {
   return Async.bind(
-    articles.get(key),
+    cache[contentType].get(key),
     Async.map(
-      function(contents) {return [article(key, contents)];}
+      function(contents) {return [render(contentType, key, contents)];}
     )
   );
 }
 
 function preview(key) {
   return Async.bind(
-    articles.get(key),
+    cache.article.get(key),
     function(contents) {
       return Async.wrap(
-        article(key, contents, blog.skin.previewLinesCount)
+        render('article', key, contents, blog.skin.previewLinesCount)
       );
     }
   );

src/Arguments.hs

@@ -1,9 +1,12 @@
+{-# LANGUAGE CPP #-}
 module Arguments (
       Arguments(..)
     , get
   ) where
 
+#if !MIN_VERSION_base(4,11,0)
 import Data.Monoid ((<>))
+#endif
 import Data.Version (showVersion)
 import Control.Applicative ((<|>), (<**>), optional)
 import Options.Applicative (
@@ -16,7 +19,7 @@ import System.FilePath (dropTrailingPathSeparator, isValid)
 
 data Arguments = BlogConfig {
       sourceDir :: FilePath
-    , articlesPath :: FilePath
+    , articlesPath :: Maybe FilePath
     , bannerPath :: Maybe FilePath
     , cardImage :: Maybe FilePath
     , commentsURL :: Maybe String
@@ -47,13 +50,8 @@ option readM aShort aLong aMetavar aHelpMessage =
 blogConfig :: Parser Arguments
 blogConfig = BlogConfig
   <$> argument filePath (value "." <> metavar "INPUT_DIR")
-  <*> Optparse.option filePath (
-          metavar "DIRECTORY"
-        <> value "articles"
-        <> short 'a'
-        <> long "articles"
-        <> help "relative path to the directory containing the articles within INPUT_DIR"
-      )
+  <*> option filePath 'a' "articles" "DIRECTORY"
+        "relative path to the directory containing the articles within INPUT_DIR"
   <*> option filePath 'b' "banner" "FILE" "path to the file to use for the blog's banner"
   <*> option filePath 'c' "card-image" "FILE" "relative path to the image to use for the blog's card"
   <*> option filePath 'C' "comments-url" "URL" "URL of the instance where comments are stored"
@@ -61,8 +59,8 @@ blogConfig = BlogConfig
   <*> option filePath 'H' "head" "FILE" "path to the file to add in the blog's head"
   <*> option str 'n' "name" "BLOG_NAME" "name of the blog"
   <*> switch (short 'O' <> long "open-graph-cards" <> help "enable Open Graph cards")
-  <*> option filePath 'p' "pages"
-        "DIRECTORY" "relative path to the directory containing the pages within INPUT_DIR"
+  <*> option filePath 'p' "pages" "DIRECTORY"
+        "relative path to the directory containing the pages within INPUT_DIR"
   <*> Optparse.option auto (
           metavar "INTEGER"
         <> value 3

src/Article.hs

@@ -1,75 +1,23 @@
 {-# LANGUAGE NamedFieldPuns #-}
-{-# LANGUAGE FlexibleContexts #-}
 module Article (
       Article(..)
     , at
-    , getKey
     , preview
   ) where
 
 import Control.Applicative ((<|>))
-import Data.Map (Map)
-import qualified Data.Map as Map (fromList, alter)
+import qualified Data.Map as Map (alter)
 import Data.Time (defaultTimeLocale, getCurrentTimeZone, parseTimeM, timeZoneOffsetString)
 import Data.Time.Clock.POSIX (POSIXTime, utcTimeToPOSIXSeconds)
 import Foreign.C.Types (CTime)
-import System.FilePath (dropExtension, takeFileName)
+import Markdown (Markdown(..), MarkdownContent(..), Metadata)
+import qualified Markdown (at)
 import System.Posix.Files (getFileStatus, modificationTime)
-import Text.ParserCombinators.Parsec (
-      ParseError
-    , Parser
-    , (<?>)
-    , anyChar, char, count, endBy, eof, getPosition, many, many1, noneOf
-    , oneOf, option, parse, skipMany, sourceLine, string, try
-  )
+import Text.ParserCombinators.Parsec (ParseError)
 
-type Metadata = Map String String
-
-data Article = Article {
-      key :: String
-    , title :: String
-    , metadata :: Metadata
-    , bodyOffset :: Int
-    , body :: [String]
-  }
-
-type ProtoArticle = (String, Metadata, Int, [String])
-
-articleP :: Parser ProtoArticle
-articleP =
-  skipMany eol *> headerP <* skipMany eol <*> lineOffset <*> bodyP
-  where
-    headerP =
-        try ((,,,) <$> titleP <* many eol <*> metadataP)
-      <|> flip (,,,) <$> metadataP  <* many eol<*> titleP
-    lineOffset = pred . sourceLine <$> getPosition
-    bodyP = lines <$> many anyChar <* eof
-
-metadataP :: Parser Metadata
-metadataP = Map.fromList <$> option [] (
-    metaSectionSeparator *> many eol *>
-    (try keyVal) `endBy` (many1 eol)
-    <* metaSectionSeparator
-  ) <?> "metadata section"
-  where
-    metaSectionSeparator = count 3 (oneOf "~-") *> eol
-    spaces = skipMany $ char ' '
-    keyVal = (,) <$> (no ": \r\n" <* spaces <* char ':' <* spaces) <*> no "\r\n"
-
-titleP :: Parser String
-titleP = try (singleLine <|> underlined)
-  where
-    singleLine = char '#' *> char ' ' *> no "\r\n" <* eol
-    underlined =
-      no "\r\n" <* eol
-      >>= \titleLine -> count (length titleLine) (oneOf "#=") *> eol *> return titleLine
-      <?> "'#' or '=' to underline the title"
-
-eol :: Parser String
-eol = try (string "\r\n") <|> string "\r" <|> string "\n" <?> "newline"
-
-no :: String -> Parser String
-no = many1 . noneOf
+newtype Article = Article Markdown
+instance MarkdownContent Article where
+  getMarkdown (Article markdown) = markdown
 
 setDate :: String -> CTime -> Metadata -> Metadata
 setDate tzOffset defaultDate = Map.alter timeStamp "date"
@@ -82,27 +30,16 @@ setDate tzOffset defaultDate = Map.alter timeStamp "date"
       let parsedTimes = parseTimeM True defaultTimeLocale <$> formats <*> dates in
       foldr (<|>) (timeStamp Nothing) (fmap epoch <$> parsedTimes)
 
-makeArticle :: FilePath -> (Metadata -> Metadata) -> ProtoArticle -> (String, Article)
-makeArticle filePath metaFilter (title, metadata, bodyOffset, body) = (
-      getKey filePath
-    , Article {
-          key = getKey filePath
-        , title
-        , metadata = metaFilter metadata
-        , bodyOffset
-        , body
-      }
-  )
+makeArticle :: (Metadata -> Metadata) -> Markdown -> (String, Article)
+makeArticle metaFilter markdown@(Markdown {key, metadata}) =
+  (key, Article $ markdown {metadata = metaFilter metadata})
 
 at :: FilePath -> IO (Either ParseError (String, Article))
 at filePath = do
   tzOffset <- timeZoneOffsetString <$> getCurrentTimeZone
   fileDate <- modificationTime <$> getFileStatus filePath
-  let build = makeArticle filePath (setDate tzOffset fileDate)
-  fmap build . parse articleP filePath <$> readFile filePath
+  fmap (makeArticle (setDate tzOffset fileDate)) <$> Markdown.at filePath
 
-getKey :: FilePath -> String
-getKey = dropExtension . takeFileName
-
-preview :: Int -> Article -> Article
-preview linesCount article = article {body = take linesCount $ body article}
+preview :: Int -> Article -> Markdown
+preview linesCount (Article markdown@(Markdown {body})) =
+  markdown {body = take linesCount $ body}

src/Blog.hs

@@ -15,7 +15,7 @@ module Blog (
 import Arguments (Arguments)
 import qualified Arguments (name, sourceDir)
 import Article (Article)
-import qualified Article (at, getKey)
+import qualified Article (at)
 import Blog.Path (Path(..))
 import qualified Blog.Path as Path (build)
 import Blog.Template (Environment, Templates, render)
@@ -34,22 +34,28 @@ import qualified Data.Map as Map (empty, fromList)
 import Data.Set (Set)
 import qualified Data.Set as Set (empty, null, singleton, union)
 import Data.Text (Text)
-import Files (File(..), absolute)
+import Files (File(..), filePath)
 import qualified Files (find)
+import Markdown (getKey)
+import Page (Page)
+import qualified Page (at)
 import Prelude hiding (lookup)
-import System.Directory (doesFileExist, withCurrentDirectory)
+import Pretty (assertRight, onRight)
+import System.Directory (doesFileExist, makeAbsolute, withCurrentDirectory)
 import System.FilePath ((</>), dropTrailingPathSeparator, takeExtension, takeFileName)
 import Text.Parsec (ParseError)
 
-type Collection = Map String Article
+type Collection = Map String
+type Parsed a = Either ParseError (String, a)
 
 data Blog = Blog {
-      articles :: Collection
+      articles :: Collection Article
     , hasRSS :: Bool
     , name :: String
+    , pages :: Collection Page
     , path :: Path
     , skin :: Skin
-    , tags :: Map String (Set String)
+    , tags :: Collection (Set String)
     , templates :: Templates
     , urls :: URL
     , wording :: Wording
@@ -60,41 +66,47 @@ type Renderer m = (MonadIO m, MonadReader Blog m)
 template :: Renderer m => String -> Environment -> m Text
 template key environment = asks templates >>= render key environment
 
-keepOrWarn :: Map String Article -> Either ParseError (String, Article) -> IO (Map String Article)
+keepOrWarn :: Collection a -> Parsed a -> IO (Collection a)
 keepOrWarn accumulator (Left parseErrors) =
-  forM [show parseErrors, "=> Ignoring this article"] putStrLn
+  forM [show parseErrors, "=> Ignoring this text"] putStrLn
   >> return accumulator
 keepOrWarn accumulator (Right (key, article)) =
   return $ insert key article accumulator
 
-findArticles :: FilePath -> IO (Map String Article)
-findArticles =
+find :: (FilePath -> IO (Parsed a)) -> FilePath -> IO (Collection a)
+find parser =
   Files.find
   >=> filterM isMarkDownFile
-  >=> mapM Article.at
+  >=> mapM parser
   >=> foldM keepOrWarn Map.empty
   where
     isMarkDownFile path = do
       let correctExtension = takeExtension path == ".md"
       (correctExtension &&) <$> doesFileExist path
 
-tagged :: Collection -> FilePath -> IO (String, Set String)
+tagged :: Collection Article -> FilePath -> IO (String, Set String)
 tagged collection path = do
   links <- Files.find path
   keys <- forM links $ \link -> do
     fileExists <- doesFileExist link
     return $ if fileExists
-      then let articleKey = Article.getKey link in
+      then let articleKey = getKey link in
         maybe Set.empty (\_ -> Set.singleton articleKey) (lookup articleKey collection)
       else Set.empty
   return (takeFileName path, foldl Set.union Set.empty keys)
 
-discover :: Path -> IO (Collection, Map String (Set String))
+discover :: Path -> IO (Collection Article, Collection Page, Collection (Set String))
 discover path = do
-  articles <- findArticles $ articlesPath path
-  tags <- Map.fromList . filter (not . Set.null . snd)
-    <$> (Files.find (articlesPath path </> "tags") >>= mapM (articles `tagged`))
-  return (articles, tags)
+  (articles, tags) <- discoverArticles $ articlesPath path
+  pages <- maybe (return Map.empty) (find Page.at) $ pagesPath path
+  return (articles, pages, tags)
+  where
+    discoverArticles Nothing = return (Map.empty, Map.empty)
+    discoverArticles (Just somePath) = do
+      articles <- find Article.at somePath
+      tags <- Map.fromList . filter (not . Set.null . snd)
+        <$> (Files.find (somePath </> "tags") >>= mapM (articles `tagged`))
+      return (articles, tags)
 
 build :: Arguments -> IO Blog
 build arguments = do
@@ -102,13 +114,13 @@ build arguments = do
   let hasRSS = maybe False (\_-> True) $ rss urls
   wording <- Wording.build arguments
   templates <- Template.build wording
-  root <- Files.absolute . Dir $ Arguments.sourceDir arguments
+  root <- onRight makeAbsolute =<< filePath (Dir $ Arguments.sourceDir arguments)
   withCurrentDirectory root $ do
-    path <- Path.build root arguments
+    path <- assertRight =<< Path.build root arguments
     let name = maybe (takeFileName $ dropTrailingPathSeparator root) id
               $ Arguments.name arguments
     skin <- Skin.build name arguments
-    (articles, tags) <- discover path
+    (articles, pages, tags) <- discover path
     return $ Blog {
-        articles, hasRSS, name, path, skin, tags, templates, urls, wording
+        articles, hasRSS, name, pages, path, skin, tags, templates, urls, wording
       }

src/Blog/Path.hs

@@ -1,6 +1,7 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE CPP #-}
 module Blog.Path (
       Path(..)
     , build
@@ -8,17 +9,21 @@ module Blog.Path (
 
 import Arguments (Arguments)
 import qualified Arguments as Arguments (Arguments(..))
+import Control.Monad (join)
+import Control.Monad.Except (MonadError(..), ExceptT(..), runExceptT)
 import Data.Aeson (ToJSON(..), (.=), pairs)
+#if !MIN_VERSION_base(4,11,0)
 import Data.Monoid ((<>))
+#endif
 import Files (File(..), filePath)
 import GHC.Generics (Generic)
 
 data Path = Path {
-      articlesPath :: FilePath
+      articlesPath :: Maybe FilePath
     , pagesPath :: Maybe FilePath
     , remarkableConfig :: Maybe FilePath
     , root :: FilePath
-  } deriving Generic
+  } deriving (Eq, Generic, Show)
 
 instance ToJSON Path where
   toEncoding (Path {articlesPath, pagesPath}) = pairs (
@@ -26,9 +31,22 @@ instance ToJSON Path where
       <> "pagesPath" .= pagesPath
     )
 
-build :: FilePath -> Arguments -> IO Path
-build root arguments = do
-  articlesPath <- filePath . Dir $ Arguments.articlesPath arguments
-  pagesPath <- mapM (filePath . Dir) $ Arguments.pagesPath arguments
-  remarkableConfig <- mapM (filePath . File) $ Arguments.remarkableConfig arguments
-  return $ Path {articlesPath, pagesPath, remarkableConfig, root}
+checkFor :: (FilePath -> File) -> FilePath -> ExceptT String IO (Maybe FilePath)
+checkFor fileOrDir = ExceptT . fmap (Just <$>) . filePath . fileOrDir
+
+getMarkdownPath :: FilePath -> Maybe FilePath -> ExceptT String IO (Maybe FilePath)
+getMarkdownPath defaultPath Nothing =
+  ExceptT . (Right . either (\_ -> Nothing) Just <$>) . filePath $ Dir defaultPath
+getMarkdownPath _ (Just customPath) = checkFor Dir customPath
+
+build :: FilePath -> Arguments -> IO (Either String Path)
+build root arguments = runExceptT . join $ pack
+  <$> getMarkdownPath "articles" (Arguments.articlesPath arguments)
+  <*> getMarkdownPath "pages" (Arguments.pagesPath arguments)
+  <*> maybe ignore (checkFor File) (Arguments.remarkableConfig arguments)
+  where
+    pack Nothing Nothing _ =
+      throwError "No articles ? No pages ? Why did you wake me up ? I'm going back to sleep"
+    pack articlesPath pagesPath remarkableConfig =
+      return $ Path {articlesPath, pagesPath, remarkableConfig, root}
+    ignore = return Nothing

src/Blog/Skin.hs

@@ -1,6 +1,7 @@
 {-# LANGUAGE DeriveGeneric #-}
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE CPP #-}
 module Blog.Skin (
       Skin(..)
     , build
@@ -11,7 +12,9 @@ import qualified Arguments (bannerPath, favicon, cardImage, headPath, previewArt
 import Control.Monad (filterM)
 import Data.Aeson (ToJSON(..), (.=), pairs)
 import Data.Maybe (listToMaybe)
+#if !MIN_VERSION_base(4,11,0)
 import Data.Monoid ((<>))
+#endif
 import Files (absoluteLink)
 import GHC.Generics (Generic)
 import Prelude hiding (head)
@@ -36,7 +39,7 @@ instance ToJSON Skin where
 findImage :: String -> Maybe FilePath -> IO (Maybe FilePath)
 findImage _ (Just path) = return . Just $ absoluteLink path
 findImage name Nothing =
-  fmap absoluteLink . listToMaybe <$> filterM doesFileExist pathsToCheck
+  listToMaybe <$> filterM doesFileExist pathsToCheck
   where
     directories = [".", "image", "images", "pictures", "skin", "static"]
     extensions = ["ico", "gif", "jpeg", "jpg", "png", "svg"]

src/Blog/Wording.hs

@@ -26,12 +26,15 @@ variables :: Map String [Text]
 variables = Map.fromList [
       ("allLink", [])
     , ("allPage", ["tag"])
+    , ("articleDescription", ["name"])
     , ("commentsLink", [])
     , ("commentsSection", [])
     , ("dateFormat", [])
     , ("latestLink", [])
     , ("latestPage", ["tag"])
     , ("metadata", ["author", "date", "tags"])
+    , ("pageDescription", ["name"])
+    , ("pagesList", [])
     , ("rssLink", [])
     , ("rssTitle", ["tag"])
     , ("tagsList", [])

src/Collection.hs

@@ -6,7 +6,7 @@ module Collection (
     , title
   ) where
 
-import Article(Article(metadata))
+import Article(Article)
 import Blog (Blog(..), Path(..))
 import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Reader (MonadReader(..), ReaderT, asks)
@@ -15,6 +15,7 @@ import Data.Map ((!))
 import qualified Data.Map as Map (elems, filterWithKey, toList)
 import Data.Ord (Down(..))
 import qualified Data.Set as Set (member)
+import Markdown (Markdown(metadata), MarkdownContent(..))
 import Pretty ((.$))
 import System.Directory (createDirectoryIfMissing)
 import System.FilePath ((</>))
@@ -34,7 +35,7 @@ build featured tag = do
       featured = sortByDate featured, basePath, tag
     }
   where
-    sortByDate = sortOn (Down . (! "date") . metadata)
+    sortByDate = sortOn (Down . (! "date") . metadata . getMarkdown)
 
 getAll :: ReaderT Blog IO [Collection]
 getAll = do

src/DOM.hs

@@ -1,18 +1,19 @@
 {-# LANGUAGE NamedFieldPuns #-}
 {-# LANGUAGE OverloadedStrings #-}
 module DOM (
-    page
+      HasContent(..)
+    , htmlDocument
   ) where
 
-import Article (Article(..))
+import Article (Article)
 import qualified Article (preview)
 import ArticlesList (
     ArticlesList(..), description, getArticles, otherURL, rssLinkTexts
   )
-import Blog (Blog(..), Path(..), Skin(..), URL(..), template)
+import Blog (Blog(..), Skin(..), URL(..), template)
 import Control.Monad.Reader (ReaderT, asks)
-import qualified Data.Map as Map (keys)
-import Data.Text (pack, empty)
+import Data.Map as Map (Map, toList)
+import Data.Text (Text, pack, empty)
 import DOM.Card (HasCard)
 import qualified DOM.Card as Card (make)
 import Files (absoluteLink)
@@ -21,19 +22,24 @@ import Lucid (
     , head_, header_, href_, li_, link_, id_, meta_, pre_, rel_, script_, src_
     , title_, toHtml, toHtmlRaw, type_, ul_
   )
+import Markdown (Markdown(..), MarkdownContent(..))
+import Page (Page)
 import Prelude hiding (head, lookup)
 import Pretty ((.$))
-import System.FilePath.Posix ((</>), (<.>))
+import System.FilePath.Posix ((<.>))
 
 type HtmlGenerator = HtmlT (ReaderT Blog IO)
 
-class HasCard a => Page a where
+class HasCard a => HasContent a where
   content :: a -> HtmlGenerator ()
 
-instance Page Article where
-  content = article True
+instance HasContent Article where
+  content = mDContent True . getMarkdown
 
-instance Page ArticlesList where
+instance HasContent Page where
+  content = mDContent True . getMarkdown
+
+instance HasContent ArticlesList where
   content al@(ArticlesList {full}) = do
     preview <- Article.preview <$> (asks $skin.$previewLinesCount)
     h2_ . toHtml =<< description al
@@ -41,7 +47,7 @@ instance Page ArticlesList where
       asks hasRSS >>= rssLink
       li_ . a_ [href_ . pack $ otherURL al, class_ "other"] =<< otherLink
     div_ [class_ "articles"] (
-        mapM_ (article False . preview) =<< getArticles al
+        mapM_ (mDContent False . preview) =<< getArticles al
       )
     where
       otherLink =
@@ -52,24 +58,25 @@ instance Page ArticlesList where
         li_ . a_ [href_ "rss.xml", class_ "RSS", title_ title] $ toHtml text
       rssLink False = return ()
 
-article :: Bool -> Article -> HtmlGenerator ()
-article raw (Article {key, body, Article.title}) = do
-  url <- absoluteLink . (</> key <.> extension) <$> (asks $path.$articlesPath)
+mDContent :: Bool -> Markdown -> HtmlGenerator ()
+mDContent raw markdown@(Markdown {key, body}) =
   article_ [id_ $ pack key] (do
-      header_ (do
-          a_ [href_ $ pack url] . h1_ $ toHtml title
-        )
+      header_ . h1_ $ mDLink raw markdown
       pre_ . toHtml $ unlines body
     )
-  where extension = if raw then "md" else "html"
+
+mDLink :: Bool -> Markdown -> HtmlGenerator ()
+mDLink raw (Markdown {Markdown.path, title}) =
+  a_ [href_ $ pack url] $ toHtml title
+  where
+    url = absoluteLink $ path <.> (if raw then "md" else "html")
 
 tag :: String -> HtmlGenerator ()
-tag name = li_ (
-    a_ [href_ . pack $ absoluteLink name ++ "/", class_ "tag"] $ toHtml name
-  )
+tag name =
+  a_ [href_ . pack $ absoluteLink name ++ "/", class_ "tag"] $ toHtml name
 
 defaultBanner :: HtmlGenerator ()
-defaultBanner = do
+defaultBanner =
   div_ [id_ "header"] (
       a_ [href_ "/"] (
           h1_ . toHtml =<< asks name
@@ -77,13 +84,25 @@ defaultBanner = do
     )
 
 faviconLink :: FilePath -> HtmlGenerator ()
-faviconLink url = link_ [rel_ "shortcut icon", href_ $ pack url, type_ "image/x-icon"]
+faviconLink url = link_ [
+    rel_ "shortcut icon", href_ . pack $ absoluteLink url, type_ "image/x-icon"
+  ]
 
 optional :: (a -> HtmlGenerator ()) -> Maybe a -> HtmlGenerator ()
 optional = maybe (return ()) 
 
-page :: Page a => a -> HtmlGenerator ()
-page aPage =
+navigationSection ::
+  Text -> String -> ((String, a) -> HtmlGenerator ()) -> Map String a -> HtmlGenerator ()
+navigationSection sectionId templateKey generator collection
+  | null collection = return ()
+  | otherwise =
+      div_ [id_ sectionId, class_ "navigator"] (do
+          h2_ . toHtml =<< template templateKey []
+          ul_ . mapM_  (li_ . generator) $ Map.toList collection
+        )
+
+htmlDocument :: HasContent a => a -> HtmlGenerator ()
+htmlDocument someContent =
   doctypehtml_ (do
       head_ (do
           meta_ [charset_ "utf-8"]
@@ -91,15 +110,15 @@ page aPage =
           script_ [src_ "/js/remarkable.min.js"] empty
           script_ [src_ "/js/hablo.js"] empty
           optional faviconLink =<< (asks $skin.$favicon)
-          optional (Card.make aPage) =<< (asks $urls.$cards)
+          optional (Card.make someContent) =<< (asks $urls.$cards)
           optional toHtmlRaw =<< (asks $skin.$head)
         )
       body_ (do
           maybe defaultBanner toHtmlRaw =<< (asks $skin.$banner)
-          div_ [id_ "navigator"] (do
-              h2_ . toHtml =<< template "tagsList" []
-              ul_ . mapM_ tag . Map.keys =<< asks tags
-            )
-          div_ [id_ "contents"] $ content aPage
+          asks tags >>= navigationSection "tags" "tagsList"
+                          (\(key, _) -> tag key)
+          asks pages >>= navigationSection "pages" "pagesList"
+                          (\(_, page) -> mDLink False $ getMarkdown page)
+          div_ [id_ "contents"] $ content someContent
         )
     )

src/DOM/Card.hs

@@ -2,15 +2,14 @@
 {-# LANGUAGE FlexibleContexts #-}
 {-# LANGUAGE OverloadedStrings #-}
 module DOM.Card (
-      Card(..)
-    , HasCard(..)
+      HasCard(..)
     , make
   ) where
 
-import qualified Article (Article(..))
+import Article (Article(..))
 import ArticlesList (ArticlesList(..))
 import qualified ArticlesList (description)
-import Blog (Blog(..), Renderer, Skin(..))
+import Blog (Blog(..), Renderer, Skin(..), template)
 import Collection (Collection(..))
 import qualified Collection (title)
 import Control.Applicative ((<|>))
@@ -19,18 +18,18 @@ import qualified Data.Map as Map (lookup)
 import Data.Text (Text, pack)
 import Lucid (HtmlT, content_, meta_)
 import Lucid.Base (makeAttribute)
+import Markdown (MarkdownContent(..), metadata)
+import qualified Markdown (Markdown(..))
+import Page (Page(..))
 import Pretty ((.$))
-
-data Card = Card {
-      cardType :: Text
-    , description :: Text
-    , image :: Maybe String
-    , title :: String
-    , urlPath :: String
-  }
+import System.FilePath.Posix ((</>), (<.>))
 
 class HasCard a where
-  getCard :: Renderer m => a -> m Card
+  cardType :: Renderer m => a -> m Text
+  description :: Renderer m => a -> m Text
+  image :: Renderer m => a -> m (Maybe String)
+  title :: Renderer m => a -> m String
+  urlPath :: Renderer m => a -> m String
 
 og :: Applicative m => Text -> Text -> HtmlT m ()
 og attribute value =
@@ -41,39 +40,52 @@ og attribute value =
 
 make :: (HasCard a, Renderer m) => a -> String -> HtmlT m ()
 make element siteURL = do
-  Card {cardType, description, image, title, urlPath} <- getCard element
-  og "url" . pack $ siteURL ++ urlPath
-  og "type" cardType
-  og "title" $ pack title
-  og "description" description
-  maybeImage =<< ((image <|>) <$> (asks $skin.$cardImage))
+  og "url" . sitePrefix =<< urlPath element
+  og "type" =<< cardType element
+  og "title" . pack =<< title element
+  og "description" =<< description element
+  maybeImage =<< ((<|>) <$> image element <*> (asks $skin.$cardImage))
   og "site_name" =<< (asks $name.$pack)
   where
-    maybeImage = maybe (return ()) (og "image" . pack . (siteURL++))
+    maybeImage = maybe (return ()) (og "image" . sitePrefix)
+    sitePrefix = pack . (siteURL </>)
 
-instance HasCard Article.Article where
-  getCard (Article.Article {Article.title, Article.metadata}) = do
-    description <- pack <$> getDescription (Map.lookup "summary" metadata)
-    return $ Card {
-          cardType = "article"
-        , description
-        , image = (Map.lookup "featuredImage" metadata)
-        , DOM.Card.title
-        , urlPath = "/articles/" ++ title ++ ".html"
-      }
-    where
-      getDescription = maybe (asks $name.$("A new article on " <>)) return
+mDImage :: (Renderer m, MarkdownContent a ) => a -> m (Maybe String)
+mDImage = return . Map.lookup "featuredImage" . metadata . getMarkdown
+
+mDTitle :: (Renderer m, MarkdownContent a) => a -> m String
+mDTitle = return . Markdown.title . getMarkdown
+
+mDUrlPath :: (Renderer m, MarkdownContent a) => a -> m String
+mDUrlPath a = return $ Markdown.path (getMarkdown a) <.> "html"
+
+mDDescription :: (Renderer m, MarkdownContent a) => String -> a -> m Text
+mDDescription key =
+  getDescription . Map.lookup "summary" . metadata . getMarkdown
+  where
+    getDescription = maybe defaultDescription (return . pack)
+    defaultDescription = asks name >>= template key . \v -> [("name", pack v)]
+
+instance HasCard Article where
+  cardType _ = return "article"
+  description = mDDescription "articleDescription"
+  image = mDImage
+  title = mDTitle
+  urlPath = mDUrlPath
+
+instance HasCard Page where
+  cardType _ = return "website"
+  description = mDDescription "pageDescription"
+  image = mDImage
+  title = mDTitle
+  urlPath = mDUrlPath
 
 instance HasCard ArticlesList where
-  getCard al@(ArticlesList {collection}) = do
-    cardTitle <- Collection.title collection
-    description <- ArticlesList.description al
-    return $ Card {
-          cardType = "website"
-        , description
-        , image = Nothing
-        , DOM.Card.title = cardTitle
-        , urlPath = maybe "" ('/':) (tag collection) ++ file
-      }
+  cardType _ = return "website"
+  description = ArticlesList.description
+  image _ = return Nothing
+  title (ArticlesList {collection}) = Collection.title collection
+  urlPath al@(ArticlesList {collection}) =
+    return $ maybe "" id (tag collection) </> file
     where
-      file = '/' : (if full al then "all" else "index") ++ ".html"
+      file = (if full al then "all" else "index") <.> ".html"

src/Files.hs

@@ -1,35 +1,32 @@
 module Files (
       File(..)
-    , absolute
     , absoluteLink
     , filePath
     , find
   ) where
 
-import System.Exit (die)
-import System.Directory (doesDirectoryExist, doesFileExist, listDirectory, makeAbsolute)
+import System.Directory (doesDirectoryExist, doesFileExist, listDirectory)
 import System.FilePath ((</>))
 
 data File = File FilePath | Dir FilePath
 
-absolute :: File -> IO (FilePath)
-absolute file = filePath file >>= makeAbsolute
-
 absoluteLink :: FilePath -> FilePath
 absoluteLink ('.':path) = path
 absoluteLink path = "/" </> path
 
-filePath :: File -> IO FilePath
-filePath file = do
-  let (thePath, test, errorMessage) =
-        case file of
-          File path -> (path, doesFileExist, (++ ": no such file"))
-          Dir path -> (path, doesDirectoryExist, (++ ": no such directory"))
-  bool <- test thePath
-  if bool
-    then return thePath
-    else die $ errorMessage thePath
+filePath :: File -> IO (Either String FilePath)
+filePath = filePathAux
+  where
+    filePathAux (File path) = ifIO doesFileExist path Right (notExist . File)
+    filePathAux (Dir path) = ifIO doesDirectoryExist path Right (notExist . Dir)
+    ifIO predicate value whenTrue whenFalse = do
+      result <- predicate value
+      return $ if result then whenTrue value else whenFalse value
+    notExist (File path) = Left $ path ++ ": no such file"
+    notExist (Dir path) = Left $ path ++ ": no such directory"
 
 find :: FilePath -> IO [FilePath]
 find path =
-  fmap (path </>) <$> listDirectory path
+  filePath (Dir path) >>= emptyIfMissing (fmap ((path </>) <$>) . listDirectory)
+  where
+    emptyIfMissing = either (\_ -> return [])

src/HTML.hs

@@ -4,7 +4,6 @@ module HTML (
     generate
   ) where
 
-import Article(Article(..))
 import ArticlesList (ArticlesList(..))
 import Blog (Blog(..), Path(..))
 import Collection (Collection(..))
@@ -13,8 +12,9 @@ import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Reader (ReaderT, asks)
 import qualified Data.Map as Map (elems)
 import qualified Data.Text.Lazy.IO as TextIO (writeFile)
-import DOM (page)
+import DOM (HasContent, htmlDocument)
 import Lucid (renderTextT)
+import Markdown (Markdown(..), MarkdownContent(..))
 import Pretty ((.$))
 import System.FilePath.Posix ((</>), (<.>))
 
@@ -26,19 +26,21 @@ articlesLists collection@(Collection {basePath}) = [
     file bool = if bool then "all" else "index"
     path bool = basePath </> file bool <.> "html"
 
-generateArticles :: [Article] -> ReaderT Blog IO ()
-generateArticles = mapM_ $ \article -> do
-  baseDir <- (</>) <$> (asks $path.$root) <*> (asks $path.$articlesPath)
-  (renderTextT $ page article)
-    >>= liftIO . TextIO.writeFile (baseDir </> key article <.> "html")
+generateMarkdown :: (HasContent a, MarkdownContent a) => [a] -> ReaderT Blog IO ()
+generateMarkdown = mapM_ $ \content -> do
+  let relativePath = Markdown.path (getMarkdown content) <.> "html"
+  filePath <- (</> relativePath) <$> (asks $Blog.path.$root)
+  (renderTextT $ htmlDocument content) >>= liftIO . TextIO.writeFile filePath
 
 generateCollection :: Collection -> ReaderT Blog IO ()
 generateCollection (Collection {featured = []}) = return ()
 generateCollection collection =
   flip mapM_ (articlesLists collection) $ \(filePath, articlesList) ->
-    (renderTextT $ page articlesList) >>= liftIO . TextIO.writeFile filePath
+    (renderTextT $ htmlDocument articlesList)
+      >>= liftIO . TextIO.writeFile filePath
 
 generate :: ReaderT Blog IO ()
 generate = do
-  asks articles >>= generateArticles . Map.elems
+  asks articles >>= generateMarkdown . Map.elems
   Collection.getAll >>= mapM_ generateCollection
+  asks pages >>= generateMarkdown . Map.elems

src/JS.hs

@@ -3,6 +3,8 @@ module JS (
     generate
   ) where
 
+import Data.Aeson (encode)
+
 import Blog (Blog(..), Path(..))
 import Control.Monad.IO.Class (MonadIO(..))
 import Control.Monad.Reader (ReaderT, asks)
@@ -31,7 +33,7 @@ var (varName, content) = concat ["\t", pack varName, " : ", content]
 
 generateConfig :: FilePath -> ReaderT Blog IO ()
 generateConfig destinationDir = do
-  blogJSON <- exportBlog
+  blogJSON <- asks (encode . exportBlog)
   remarkablePath <- asks $path.$remarkableConfig
   liftIO $ do
     remarkableJSON <- maybe (return "{html: true}") readFile remarkablePath

src/JSON.hs

@@ -4,58 +4,60 @@ module JSON (
     exportBlog
   ) where
 
-import Article (Article)
-import qualified Article (Article(..))
 import Blog (Blog, Path, Skin, URL, Wording)
 import qualified Blog (Blog(..))
-import Control.Monad.Reader (ReaderT, ask)
-import Data.Aeson (ToJSON(..), genericToEncoding, defaultOptions, encode)
-import Data.ByteString.Lazy (ByteString)
+import Data.Aeson (Options(..), ToJSON(..), genericToEncoding, defaultOptions)
 import Data.Map (Map, mapWithKey)
 import qualified Data.Map as Map (filter, keys)
 import qualified Data.Set as Set (elems, member)
 import GHC.Generics
+import Markdown (Markdown, MarkdownContent(..))
+import qualified Markdown (Markdown(..))
 
-data ArticleExport = ArticleExport {
+data MarkdownExport = MarkdownExport {
       title :: String
-    , bodyOffset :: Int
     , metadata :: Map String String
-    , tagged :: [String]
+    , bodyOffset :: Int
+    , tagged :: Maybe [String]
   } deriving (Generic)
 
-instance ToJSON ArticleExport where
-  toEncoding = genericToEncoding defaultOptions
+instance ToJSON MarkdownExport where
+  toEncoding = genericToEncoding (defaultOptions {omitNothingFields = True})
 
-data BlogDB = BlogDB {
-      articles :: Map String ArticleExport
+exportMarkdown :: Maybe [String] -> Markdown -> MarkdownExport
+exportMarkdown tagged markdown = MarkdownExport {
+      title = Markdown.title markdown
+    , metadata = Markdown.metadata markdown
+    , bodyOffset = Markdown.bodyOffset markdown
+    , tagged
+  }
+
+data BlogExport = BlogExport {
+      articles :: Map String MarkdownExport
     , hasRSS :: Bool
     , path :: Path
+    , pages :: Map String MarkdownExport
     , skin :: Skin
     , tags :: Map String [String]
     , urls :: URL
     , wording :: Wording
   } deriving (Generic)
 
-instance ToJSON BlogDB where
+instance ToJSON BlogExport where
   toEncoding = genericToEncoding defaultOptions
 
-exportArticle :: Blog -> String -> Article -> ArticleExport
-exportArticle blog key article = ArticleExport {
-      title = Article.title article
-    , bodyOffset = Article.bodyOffset article
-    , metadata = Article.metadata article
-    , tagged = Map.keys . Map.filter (Set.member key) $ Blog.tags blog
+exportBlog :: Blog -> BlogExport
+exportBlog blog = BlogExport {
+      articles = getArticles $ getMarkdown <$> Blog.articles blog
+    , hasRSS = Blog.hasRSS blog
+    , pages = getPages $ getMarkdown <$> Blog.pages blog
+    , path = Blog.path blog
+    , skin = Blog.skin blog
+    , tags = Set.elems <$> Blog.tags blog
+    , urls = Blog.urls blog
+    , wording = Blog.wording blog
   }
-
-exportBlog :: ReaderT Blog IO ByteString
-exportBlog = do
-  blog <- ask
-  return . encode $ BlogDB {
-        articles = mapWithKey (exportArticle blog) $ Blog.articles blog
-      , hasRSS = Blog.hasRSS blog
-      , path = Blog.path blog
-      , skin = Blog.skin blog
-      , tags = Set.elems <$> Blog.tags blog
-      , urls = Blog.urls blog
-      , wording = Blog.wording blog
-    }
+  where
+    tag key = Just . Map.keys . Map.filter (Set.member key) $ Blog.tags blog
+    getArticles = mapWithKey (exportMarkdown . tag)
+    getPages = mapWithKey (\_-> exportMarkdown Nothing)

src/Markdown.hs

@@ -0,0 +1,76 @@
+{-# LANGUAGE NamedFieldPuns #-}
+module Markdown (
+      Markdown(..)
+    , MarkdownContent(..)
+    , Metadata
+    , at
+    , getKey
+  ) where
+
+import Control.Applicative ((<|>))
+import Data.Map (Map)
+import qualified Data.Map as Map (fromList)
+import System.FilePath (dropExtension, takeFileName)
+import Text.ParserCombinators.Parsec (
+     ParseError, Parser
+    , (<?>)
+    , anyChar, char, count, endBy, eof, getPosition, many, many1, noneOf
+    , oneOf, option, parse, skipMany, sourceLine, sourceName, string, try
+  )
+
+type Metadata = Map String String
+data Markdown = Markdown {
+      key :: String
+    , path :: String
+    , title :: String
+    , metadata :: Metadata
+    , bodyOffset :: Int
+    , body :: [String]
+  }
+
+class MarkdownContent a where
+  getMarkdown :: a -> Markdown
+
+parser :: Parser Markdown
+parser = do
+  (title, metadata) <- skipMany eol *> (headerP <|> reverseHeaderP)
+  bodyOffset <- skipMany eol *> (pred . sourceLine <$> getPosition)
+  body <- lines <$> many anyChar <* eof
+  inputFile <- sourceName <$> getPosition
+  let (key, path) = (getKey inputFile, dropExtension inputFile)
+  return $ Markdown {key, path, title, metadata, bodyOffset, body}
+  where
+    headerP = (,) <$> titleP <* many eol <*> metadataP
+    reverseHeaderP = flip (,) <$> metadataP  <* many eol<*> titleP
+
+metadataP :: Parser Metadata
+metadataP = Map.fromList <$> option [] (
+    metaSectionSeparator *> many eol *>
+    (try keyVal) `endBy` (many1 eol)
+    <* metaSectionSeparator
+  ) <?> "metadata section"
+  where
+    metaSectionSeparator = count 3 (oneOf "~-") *> eol
+    spaces = skipMany $ char ' '
+    keyVal = (,) <$> (no ": \r\n" <* spaces <* char ':' <* spaces) <*> no "\r\n"
+
+titleP :: Parser String
+titleP = try (singleLine <|> underlined)
+  where
+    singleLine = char '#' *> char ' ' *> no "\r\n" <* eol
+    underlined =
+      no "\r\n" <* eol
+      >>= \titleLine -> count (length titleLine) (oneOf "#=") *> eol *> return titleLine
+      <?> "'#' or '=' to underline the title"
+
+eol :: Parser String
+eol = try (string "\r\n") <|> string "\r" <|> string "\n" <?> "newline"
+
+no :: String -> Parser String
+no = many1 . noneOf
+
+getKey :: FilePath -> String
+getKey = dropExtension . takeFileName
+
+at :: FilePath -> IO (Either ParseError Markdown)
+at filePath = parse parser filePath <$> readFile filePath

src/Page.hs

@@ -0,0 +1,17 @@
+module Page (
+      Page(..)
+    , at
+  ) where
+
+import Markdown (Markdown(..), MarkdownContent(..))
+import qualified Markdown as Markdown (at)
+import Text.ParserCombinators.Parsec (ParseError)
+
+newtype Page = Page Markdown
+instance MarkdownContent Page where
+  getMarkdown (Page markdown) = markdown
+
+at :: FilePath -> IO (Either ParseError (String, Page))
+at filePath = fmap makePage <$> Markdown.at filePath
+  where
+    makePage markdown = (key markdown, Page markdown)

src/Pretty.hs

@@ -1,6 +1,16 @@
 module Pretty (
-    (.$)
+      (.$)
+    , assertRight
+    , onRight
   ) where
 
+import System.Exit (die)
+
 (.$) :: (a -> b) -> (b -> c) -> (a -> c)
 (.$) f g = g . f
+
+onRight :: (a -> IO b) -> Either String a -> IO b
+onRight = either die
+
+assertRight :: Either String a -> IO a
+assertRight = onRight return

src/RSS.hs

@@ -8,7 +8,7 @@ module RSS (
 import Article (Article(..))
 import ArticlesList (ArticlesList(..), getArticles)
 import qualified ArticlesList (description)
-import Blog (Blog(..), Path(..), Renderer, URL(..))
+import Blog (Blog(urls), Renderer, URL(..))
 import Collection (Collection(..), getAll)
 import qualified Collection (title)
 import Control.Monad.IO.Class (MonadIO(..))
@@ -20,6 +20,7 @@ import Data.Time (defaultTimeLocale, formatTime, rfc822DateFormat)
 import Data.Time.Clock.POSIX (posixSecondsToUTCTime)
 import Lucid (Attribute, HtmlT, Term, ToHtml(..), term, renderTextT)
 import Lucid.Base (makeAttribute)
+import Markdown (Markdown(..))
 import Pretty ((.$))
 import System.FilePath.Posix ((</>), (<.>))
 
@@ -57,13 +58,12 @@ pubDate_ :: Term arg result => arg -> result
 pubDate_ = term "pubDate"
 
 articleItem :: MonadReader Blog m => String -> Article -> HtmlT m ()
-articleItem siteURL (Article {key, metadata, title}) =
+articleItem siteURL (Article (Markdown {path, metadata, title})) =
   item_ $ do
     title_ $ toHtml title
-    link_ . toHtml =<< link <$> (asks $path.$articlesPath)
+    link_ $ toHtml (siteURL </> path <.> "html")
     pubDate_ . toHtml . rfc822Date $ metadata ! "date"
   where
-    link path = siteURL </> path </> key <.> "html"
     rfc822Date =
         formatTime defaultTimeLocale rfc822DateFormat
       . posixSecondsToUTCTime . fromIntegral . (read :: String -> Int)

test/Mock/Arguments.hs

@@ -0,0 +1,86 @@
+module Mock.Arguments (
+      badCustomArticles
+    , badCustomPages
+    , bothCustom
+    , bothDefault
+    , customArticles
+    , customArticlesDefaultPages
+    , customPages
+    , customPagesDefaultArticles
+    , defaultArticles
+    , defaultPages
+    , emptyBlog
+  ) where
+
+import Arguments (Arguments(..))
+import Utils (testDataPath)
+
+defaultArticles :: Arguments
+defaultArticles = BlogConfig {
+      sourceDir = testDataPath "Structure/defaultArticles"
+    , articlesPath = Nothing
+    , bannerPath = Nothing
+    , cardImage = Nothing
+    , commentsURL = Nothing
+    , favicon = Nothing
+    , headPath = Nothing
+    , name = Nothing
+    , openGraphCards = False
+    , pagesPath = Nothing
+    , previewArticlesCount = 3
+    , previewLinesCount = 10
+    , remarkableConfig = Nothing
+    , rss = False
+    , siteURL = Nothing
+    , wording = Nothing
+  }
+
+defaultPages :: Arguments
+defaultPages = defaultArticles {
+    sourceDir = testDataPath "Structure/defaultPages"
+  }
+
+bothDefault :: Arguments
+bothDefault = defaultArticles {
+    sourceDir = testDataPath "Structure/both"
+  }
+
+emptyBlog :: Arguments
+emptyBlog = defaultArticles {
+    sourceDir = testDataPath "Structure/custom"
+  }
+
+customArticles :: Arguments
+customArticles = emptyBlog {
+    articlesPath = Just "customArticles"
+  }
+
+customArticlesDefaultPages :: Arguments
+customArticlesDefaultPages = bothDefault {
+    articlesPath = Just "customArticles"
+  }
+
+customPages :: Arguments
+customPages = emptyBlog {
+    pagesPath = Just "customPages"
+  }
+
+customPagesDefaultArticles :: Arguments
+customPagesDefaultArticles = bothDefault {
+    pagesPath = Just "customPages"
+  }
+
+bothCustom :: Arguments
+bothCustom = customArticles {
+    pagesPath = Just "customPages"
+  }
+
+badCustomArticles :: Arguments
+badCustomArticles = bothDefault {
+    articlesPath = Just "missingDirectory"
+  }
+
+badCustomPages :: Arguments
+badCustomPages = bothDefault {
+    pagesPath = Just "missingDirectory"
+  }

test/Mock/Article.hs

@@ -0,0 +1,23 @@
+module Mock.Article (
+      noDescription
+    , noImage
+    , noMeta
+    , simple
+  ) where
+
+import Article (Article(..))
+import qualified Data.Map as Map (fromList)
+import Markdown (Markdown(..))
+import Mock.Markdown (article)
+
+simple :: Article
+simple = Article article
+
+noImage :: Article
+noImage = Article $ article {metadata = Map.fromList [("summary", "It's a test")]}
+
+noDescription :: Article
+noDescription = Article $ article {metadata = Map.fromList [("featuredImage", "test.png")]}
+
+noMeta :: Article
+noMeta = Article $ article {metadata = Map.fromList []}

test/Mock/ArticlesList.hs

@@ -0,0 +1,22 @@
+module Mock.ArticlesList (
+      longMain
+    , longTesting
+    , shortMain
+    , shortTesting
+  ) where
+
+import ArticlesList (ArticlesList(..))
+import Mock.Collection (main, testing)
+import Prelude hiding (all)
+
+shortMain :: IO ArticlesList
+shortMain = ArticlesList False <$> main
+
+shortTesting :: IO ArticlesList
+shortTesting = ArticlesList False <$> testing
+
+longMain :: IO ArticlesList
+longMain = ArticlesList True <$> main
+
+longTesting :: IO ArticlesList
+longTesting = ArticlesList True <$> testing

test/Mock/Blog.hs

@@ -0,0 +1,39 @@
+{-# LANGUAGE NamedFieldPuns #-}
+module Mock.Blog (
+      noCards
+    , noRSS
+    , simple
+  ) where
+
+import Blog (Blog(..))
+import qualified Data.Map as Map (fromList)
+import qualified Data.Set as Set (fromList)
+import qualified Mock.Article (simple)
+import qualified Mock.Blog.Path (defaultArticles)
+import qualified Mock.Blog.Skin (simple)
+import qualified Mock.Blog.Template (simple)
+import qualified Mock.Blog.URL (simple, noCards)
+import qualified Mock.Blog.Wording (defaultWording)
+
+simple :: IO Blog
+simple =
+  let wording = Mock.Blog.Wording.defaultWording in do
+  templates <- Mock.Blog.Template.simple
+  return $ Blog {
+        articles = Map.fromList [("test", Mock.Article.simple)]
+      , hasRSS = True
+      , name = "The Test Blog"
+      , pages = Map.fromList []
+      , path = Mock.Blog.Path.defaultArticles
+      , skin = Mock.Blog.Skin.simple
+      , tags = Map.fromList [("testing", Set.fromList ["test"])]
+      , templates
+      , urls = Mock.Blog.URL.simple
+      , wording
+    }
+
+noCards :: IO Blog
+noCards = (\b -> b {urls = Mock.Blog.URL.noCards}) <$> simple
+
+noRSS :: IO Blog
+noRSS = (\b -> b {hasRSS = False}) <$> simple

test/Mock/Blog/Path.hs

@@ -0,0 +1,66 @@
+module Mock.Blog.Path (
+      bothCustom
+    , bothDefault
+    , customArticles
+    , customArticlesDefaultPages
+    , customPages
+    , customPagesDefaultArticles
+    , defaultArticles
+    , defaultPages
+  ) where
+
+import Blog.Path (Path(..))
+
+defaultArticles :: Path
+defaultArticles = Path {
+      articlesPath = Just "articles"
+    , pagesPath = Nothing
+    , remarkableConfig = Nothing
+    , root = "test/Structure/defaultArticles"
+  }
+
+defaultPages :: Path
+defaultPages = Path {
+      articlesPath = Nothing
+    , pagesPath = Just "pages"
+    , remarkableConfig = Nothing
+    , root = "test/Structure/defaultPages"
+  }
+
+bothDefault :: Path
+bothDefault = Path {
+      articlesPath = Just "articles"
+    , pagesPath = Just "pages"
+    , remarkableConfig = Nothing
+    , root = "test/Structure/both"
+  }
+
+customArticles :: Path
+customArticles = Path {
+      articlesPath = Just "customArticles"
+    , pagesPath = Nothing
+    , remarkableConfig = Nothing
+    , root = "test/Structure/custom"
+  }
+
+bothCustom :: Path
+bothCustom = customArticles {
+    pagesPath = Just "customPages"
+  }
+
+customPages :: Path
+customPages = bothCustom {
+    articlesPath = Nothing
+  }
+
+customArticlesDefaultPages :: Path
+customArticlesDefaultPages = bothDefault {
+      articlesPath = Just "customArticles"
+    , pagesPath = Just "pages"
+  }
+
+customPagesDefaultArticles :: Path
+customPagesDefaultArticles = customArticlesDefaultPages {
+      articlesPath = Just "articles"
+    , pagesPath = Just "customPages"
+  }

test/Mock/Blog/Skin.hs

@@ -0,0 +1,16 @@
+module Mock.Blog.Skin (
+    simple
+  ) where
+
+import Blog.Skin (Skin(..))
+import Prelude hiding (head)
+
+simple :: Skin
+simple = Skin {
+      banner = Nothing
+    , cardImage = Nothing
+    , favicon = Nothing
+    , head = Nothing
+    , previewArticlesCount = 3
+    , previewLinesCount = 10
+  }

test/Mock/Blog/Template.hs

@@ -0,0 +1,9 @@
+module Mock.Blog.Template (
+    simple
+  ) where
+
+import Blog.Template (Templates, build)
+import Mock.Blog.Wording (defaultWording)
+
+simple :: IO Templates
+simple = build Mock.Blog.Wording.defaultWording

test/Mock/Blog/URL.hs

@@ -0,0 +1,16 @@
+module Mock.Blog.URL (
+      noCards
+    , simple
+  ) where
+
+import Blog.URL (URL(..))
+
+simple :: URL
+simple = URL {
+      cards = Just "https://test.net"
+    , comments = Nothing
+    , rss = Nothing
+  }
+
+noCards :: URL
+noCards = simple {cards = Nothing}

test/Mock/Blog/Wording.hs

@@ -0,0 +1,25 @@
+{-# LANGUAGE OverloadedStrings #-}
+module Mock.Blog.Wording (
+    defaultWording
+  ) where
+
+import Blog.Wording (Wording(..))
+import qualified Data.Map as Map (fromList)
+
+defaultWording :: Wording
+defaultWording = Wording $ Map.fromList [
+      ("allLink", "See all")
+    , ("allPage", "All articles{? tagged ${tag}?}")
+    , ("articleDescription", "A new article on ${name}")
+    , ("commentsLink", "Comment on the fediverse")
+    , ("commentsSection", "Comments")
+    , ("dateFormat", "en-US")
+    , ("latestLink", "See only latest")
+    , ("latestPage", "Latest articles{? tagged ${tag}?}")
+    , ("metadata", "{?by ${author} ?}on ${date}{? tagged ${tags}?}")
+    , ("pageDescription", "Read on ${name}")
+    , ("pagesList", "Pages")
+    , ("rssLink", "Subscribe")
+    , ("rssTitle", "Follow all articles{? tagged ${tag}?}")
+    , ("tagsList", "Tags")
+  ]

test/Mock/Collection.hs

@@ -0,0 +1,28 @@
+module Mock.Collection (
+      main
+    , testing
+  ) where
+
+import Blog (Blog(..), Path(..))
+import Collection (Collection(..))
+import Data.Map as Map (elems)
+import qualified Mock.Blog (simple)
+import System.FilePath ((</>))
+
+main :: IO Collection
+main = do
+  blog <- Mock.Blog.simple
+  return $ Collection {
+      featured = Map.elems $ articles blog
+    , basePath = root $ path blog
+    , tag = Nothing
+  }
+
+testing :: IO Collection
+testing = do
+  blog <- Mock.Blog.simple
+  return $ Collection {
+      featured = Map.elems $ articles blog
+    , basePath = root (path blog) </> "testing"
+    , tag = Just "testing"
+  }

test/Mock/Markdown.hs

@@ -0,0 +1,33 @@
+module Mock.Markdown (
+      article
+    , page
+  ) where
+
+import qualified Data.Map as Map (fromList)
+import Markdown (Markdown(..))
+
+article :: Markdown
+article = Markdown {
+      key = "test"
+    , path = "articles/test"
+    , Markdown.title = "Some test"
+    , metadata = Map.fromList [
+            ("summary", "It's a test")
+          , ("featuredImage", "test.png")
+        ]
+    , bodyOffset = 3
+    , body = []
+  }
+
+page :: Markdown
+page = Markdown {
+      key = "test"
+    , path = "pages/test"
+    , Markdown.title = "A test page"
+    , metadata = Map.fromList [
+            ("summary", "Tests are useful")
+          , ("featuredImage", "test.png")
+        ]
+    , bodyOffset = 3
+    , body = []
+  }

test/Structure.hs

@@ -0,0 +1,40 @@
+module Structure (
+    test
+  ) where
+
+import Arguments (Arguments(..))
+import Blog (Path)
+import qualified Blog.Path as Path (build)
+import Distribution.TestSuite
+import qualified Mock.Arguments as Arguments
+import qualified Mock.Blog.Path as Path
+import System.Directory (withCurrentDirectory)
+import Utils (simpleTest, tag)
+
+checkPath :: Arguments -> Maybe Path -> IO Progress
+checkPath input expected = do
+  withCurrentDirectory root $ do
+    actual <- either (\_ -> Nothing) Just <$> Path.build root input
+    return . Finished $
+      if actual == expected
+      then Pass
+      else Fail $ "Expected " ++ show expected ++ " but got " ++ show actual
+  where
+    root = sourceDir input
+
+test :: Test
+test = tag "structure" . testGroup "Blog structure" $ simpleTest <$> [
+      ("empty structure", checkPath Arguments.emptyBlog Nothing)
+    , ("default articles", checkPath Arguments.defaultArticles $ Just Path.defaultArticles)
+    , ("default pages", checkPath Arguments.defaultPages $ Just Path.defaultPages)
+    , ("both default", checkPath Arguments.bothDefault $ Just Path.bothDefault)
+    , ("custom articles", checkPath Arguments.customArticles $ Just Path.customArticles)
+    , ("custom pages", checkPath Arguments.customPages $ Just Path.customPages)
+    , ("both custom", checkPath Arguments.bothCustom $ Just Path.bothCustom)
+    , ("custom articles, default pages"
+        , checkPath Arguments.customArticlesDefaultPages $ Just Path.customArticlesDefaultPages)
+    , ("custom pages, default articles"
+        , checkPath Arguments.customPagesDefaultArticles $ Just Path.customPagesDefaultArticles)
+    , ("bad custom articles", checkPath Arguments.badCustomArticles $ Nothing)
+    , ("bad custom pages", checkPath Arguments.badCustomPages $ Nothing)
+  ]

test/Tests.hs

@@ -0,0 +1,14 @@
+module Tests (
+    tests
+  ) where
+
+import Distribution.TestSuite
+import qualified Structure (test)
+import Utils (tag)
+import qualified XML.Card (test)
+
+tests :: IO [Test]
+tests = return $ tag "xml" <$> [
+      XML.Card.test
+    , Structure.test
+  ]

test/Utils.hs

@@ -0,0 +1,49 @@
+{-# LANGUAGE NamedFieldPuns #-}
+module Utils (
+      assertAll
+    , assertEqual
+    , simpleTest
+    , tag
+    , testDataPath
+  ) where
+
+import Distribution.TestSuite
+import System.FilePath ((</>))
+import Text.Printf (printf)
+
+tagInstance :: String -> TestInstance -> TestInstance
+tagInstance tagName testInstance = testInstance {
+    tags = tagName : (tags testInstance)
+  }
+
+tag :: String -> Test -> Test
+tag tagName (Test testInstance) = Test (tagInstance tagName testInstance)
+tag tagName group = group {groupTests = tag tagName <$> groupTests group}
+
+simpleTest :: (String, IO Progress) -> Test
+simpleTest (name, run) = Test testInstance
+  where
+    testInstance = TestInstance {
+          run
+        , name
+        , tags = []
+        , options = []
+        , setOption = \_ _ -> Right testInstance
+      }
+
+wrong :: Show a => String -> a -> a -> IO Progress
+wrong message expected actual = return . Finished . Fail $
+  printf "%s: %s vs. %s" message (show expected) (show actual)
+
+assertAll :: [(Bool, IO Progress, String)] -> IO Progress
+assertAll = foldr assert (return $ Finished Pass)
+  where
+    assert (bool, badIssue, checkMessage) next =
+      if bool then return $ Progress checkMessage next else badIssue
+
+assertEqual :: (Show a, Eq a) => String -> a -> a -> (Bool, IO Progress, String)
+assertEqual what a b =
+  (a == b, wrong (what ++ " do not match !") a b, what ++ " ok")
+
+testDataPath :: FilePath -> FilePath
+testDataPath = ("test" </>)

test/XML/Card.hs

@@ -0,0 +1,11 @@
+module XML.Card (
+    test
+  ) where
+
+import Distribution.TestSuite
+import Utils (tag)
+import qualified XML.Card.Component as Component (test)
+import qualified XML.Card.Output as Output (test)
+
+test :: Test
+test = tag "card" $ testGroup "Cards" [Component.test, Output.test]

test/XML/Card/Component.hs

@@ -0,0 +1,89 @@
+{-# LANGUAGE OverloadedStrings #-}
+module XML.Card.Component (
+    test
+  ) where
+
+import Blog (Blog)
+import Control.Monad.IO.Class (MonadIO(..))
+import Control.Monad.Reader (runReaderT)
+import Data.Text (Text)
+import Distribution.TestSuite
+import DOM.Card (HasCard(..))
+import Mock.Blog as Blog (simple)
+import Mock.Article as Article (noDescription, noImage, simple)
+import Mock.ArticlesList as ArticlesList (
+    longMain, longTesting, shortMain, shortTesting
+  )
+import Utils (assertAll, assertEqual, simpleTest, tag)
+
+check :: HasCard a => IO Blog -> a -> (Text, Text, Maybe String, String, String) -> IO Progress
+check getBlog input (expectedCT, expectedD, expectedI, expectedT, expectedU) =
+  getBlog >>= runReaderT (
+      sequence [
+            assertEqual "card types" expectedCT <$> cardType input
+          , assertEqual "descriptions" expectedD <$> description input
+          , assertEqual "images" expectedI <$> image input
+          , assertEqual "titles" expectedT <$> title input
+          , assertEqual "urls" expectedU <$> urlPath input
+        ] >>= liftIO . assertAll
+    )
+
+articleCard :: Test
+articleCard = tag "article" . testGroup "Article cards" $ simpleTest <$> [
+      ("simple article components", check Blog.simple Article.simple (
+            "article"
+          , "It's a test"
+          , Just "test.png"
+          , "Some test"
+          , "articles/test.html"
+        ))
+    , ("article components without description", check Blog.simple Article.noDescription (
+            "article"
+          , "A new article on The Test Blog"
+          , Just "test.png"
+          , "Some test"
+          , "articles/test.html"
+        ))
+    , ("article components without image", check Blog.simple Article.noImage (
+            "article"
+          , "It's a test"
+          , Nothing
+          , "Some test"
+          , "articles/test.html"
+        ))
+  ]
+
+articlesListCard :: Test
+articlesListCard = tag "articlesList" . testGroup "Articles list cards" $ simpleTest <$> [
+      ("short untagged page component", ArticlesList.shortMain >>= (flip (check Blog.simple) (
+            "website"
+          , "Latest articles"
+          , Nothing
+          , "The Test Blog"
+          , "index.html"
+        )))
+    , ("long untagged page component", ArticlesList.longMain >>= (flip (check Blog.simple) (
+            "website"
+          , "All articles"
+          , Nothing
+          , "The Test Blog"
+          , "all.html"
+        )))
+    , ("short tagged page component", ArticlesList.shortTesting >>= (flip (check Blog.simple) (
+            "website"
+          , "Latest articles tagged testing"
+          , Nothing
+          , "The Test Blog - testing"
+          , "testing/index.html"
+        )))
+    , ("long tagged page component", ArticlesList.longTesting >>= (flip (check Blog.simple) (
+            "website"
+          , "All articles tagged testing"
+          , Nothing
+          , "The Test Blog - testing"
+          , "testing/all.html"
+        )))
+  ]
+
+test :: Test
+test = tag "component" $ testGroup "Cards components" [articleCard, articlesListCard]

test/XML/Card/Output.hs

@@ -0,0 +1,49 @@
+module XML.Card.Output (
+    test
+  ) where
+
+import Blog (Blog(..), URL(..))
+import Control.Monad.IO.Class (MonadIO(..))
+import Control.Monad.Reader (asks, runReaderT)
+import qualified Data.Text.Lazy.IO as Lazy (readFile)
+import Distribution.TestSuite
+import DOM.Card (HasCard(..), make)
+import Lucid (renderTextT)
+import Mock.Blog as Blog (noCards, simple)
+import Mock.Article as Article (noDescription, noImage, simple)
+import Mock.ArticlesList as ArticlesList (
+    longMain, longTesting, shortMain, shortTesting
+  )
+import Pretty ((.$))
+import System.FilePath ((</>))
+import Utils (assertAll, assertEqual, simpleTest, tag, testDataPath)
+
+check :: HasCard a => IO Blog -> a -> FilePath -> IO Progress
+check getBlog input expectedFile =
+  getBlog >>= runReaderT (do
+      actual <- renderTextT $ maybe (return ()) (DOM.Card.make input) =<< (asks $urls.$cards)
+      expected <- liftIO . Lazy.readFile $ testDataPath "XML/Card/Output" </> expectedFile
+      liftIO $ assertAll [
+          assertEqual "card HTML output" expected actual
+        ]
+    )
+
+articleCard :: Test 
+articleCard = tag "article" . testGroup "Article cards" $ simpleTest <$> [
+      ("simple article output", check Blog.simple Article.simple "simple.html")
+    , ("article output without description", check Blog.simple Article.noDescription "noDescription.html")
+    , ("article output without image", check Blog.simple Article.noImage "noImage.html")
+    , ("no card article output", check Blog.noCards Article.simple "/dev/null")
+  ]
+
+articlesListCard :: Test 
+articlesListCard = tag "article" . testGroup "Article cards" $ simpleTest <$> [
+      ("short untagged page output", ArticlesList.shortMain >>= flip (check Blog.simple) "shortMain.html")
+    , ("long untagged page output", ArticlesList.longMain >>= flip (check Blog.simple) "longMain.html")
+    , ("short tagged page output", ArticlesList.shortTesting >>= flip (check Blog.simple) "shortTesting.html")
+    , ("long tagged page output", ArticlesList.longTesting >>= flip (check Blog.simple) "longTesting.html")
+    , ("no card articlesList output", ArticlesList.shortMain >>= flip (check Blog.noCards) "/dev/null")
+  ]
+
+test :: Test
+test = tag "output" $ testGroup "Cards outputs" [articleCard, articlesListCard]

test/XML/Card/Output/longMain.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/all.html"><meta property="og:type" content="website"><meta property="og:title" content="The Test Blog"><meta property="og:description" content="All articles"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/longTesting.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/testing/all.html"><meta property="og:type" content="website"><meta property="og:title" content="The Test Blog - testing"><meta property="og:description" content="All articles tagged testing"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/noDescription.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/articles/test.html"><meta property="og:type" content="article"><meta property="og:title" content="Some test"><meta property="og:description" content="A new article on The Test Blog"><meta property="og:image" content="https://test.net/test.png"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/noImage.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/articles/test.html"><meta property="og:type" content="article"><meta property="og:title" content="Some test"><meta property="og:description" content="It&#39;s a test"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/shortMain.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/index.html"><meta property="og:type" content="website"><meta property="og:title" content="The Test Blog"><meta property="og:description" content="Latest articles"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/shortTesting.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/testing/index.html"><meta property="og:type" content="website"><meta property="og:title" content="The Test Blog - testing"><meta property="og:description" content="Latest articles tagged testing"><meta property="og:site_name" content="The Test Blog">

test/XML/Card/Output/simple.html

@@ -0,0 +1 @@
+<meta property="og:url" content="https://test.net/articles/test.html"><meta property="og:type" content="article"><meta property="og:title" content="Some test"><meta property="og:description" content="It&#39;s a test"><meta property="og:image" content="https://test.net/test.png"><meta property="og:site_name" content="The Test Blog">