From: sabadev <dev@sabadev.xyz>
Date: Fri, 7 May 2021 00:42:15 +0000 (-0400)
Subject: Added last modified date to the blog links.
X-Git-Url: http://sabadev.xyz:4321/?a=commitdiff_plain;h=1ba6a69b9cfb0f8721fdb37b075ea3722cad0fe4;p=website.git

Added last modified date to the blog links.
---

diff --git a/package.yaml b/package.yaml
index f7da016..37a0fa0 100644
--- a/package.yaml
+++ b/package.yaml
@@ -27,6 +27,7 @@ dependencies:
 - cmark == 0.6
 - containers == 0.6.2.1
 - directory == 1.3.6.0
+- filepath == 1.4.2.1
 - http-api-data == 0.4.1.1
 - http-media == 0.8.0.0
 - lucid == 2.9.12.1
@@ -37,6 +38,7 @@ dependencies:
 - servant-server == 0.18.2
 - tagsoup == 0.14.8
 - text == 1.2.4.1
+- time == 1.9.3
 - warp == 3.3.14
 - with-utf8 == 1.0.2.2
 
diff --git a/src/Html.hs b/src/Html.hs
index a592b93..30a809e 100644
--- a/src/Html.hs
+++ b/src/Html.hs
@@ -5,13 +5,17 @@ import Control.Exception.Safe (SomeException)
 import Control.Monad (void)
 import Control.Monad.Error.Class (MonadError(..))
 import Control.Monad.IO.Class (MonadIO(..), liftIO)
+import Data.Bifunctor (first)
 import Data.ByteString.Lazy (ByteString(..))
-import Data.List (sort)
+import Data.List (sortOn)
 import Data.Maybe (fromMaybe)
+import Data.Time.Clock (UTCTime(..))
+import Data.Time.Format (formatTime, defaultTimeLocale, iso8601DateFormat)
 import Lucid
 import Sanitize
 import Servant
-import System.Directory (getDirectoryContents)
+import System.Directory (getDirectoryContents, getModificationTime)
+import System.FilePath.Posix ((</>))
 import qualified Data.Text as T
 import qualified Data.Text.IO as T
 
@@ -67,11 +71,17 @@ navigation theme = do
     blogListItems
 
 blogList :: (MonadIO m) => Maybe Theme -> m (Html ())
-blogList theme = liftIO $ getDirectoryContents staticPath >>= pure . foldMap (blogListItem theme) . sort . filter (T.isSuffixOf markdownExtension) . fmap T.pack
+blogList theme = liftIO $ getDirectoryContents staticPath >>= mapM blogModificationTime . fmap T.unpack . filter (T.isSuffixOf markdownExtension) . fmap T.pack >>= pure . foldMap (blogListItem theme) . sortOn snd . fmap (first T.pack)
 
-blogListItem :: Maybe Theme -> T.Text -> Html ()
-blogListItem theme (blogLink -> Nothing) = pure $ mempty
-blogListItem theme (blogLink -> (Just file)) = li_ [class_ "blog-link"] $ a_ [href_ $ safeBlogLink theme $ T.unpack file] $ toHtml file
+blogModificationTime :: (MonadIO m) => FilePath -> m (FilePath, UTCTime)
+blogModificationTime filePath = liftIO $ getModificationTime (staticPath </> filePath) >>= pure . (,) filePath
+
+blogListItem :: Maybe Theme -> (T.Text, UTCTime) -> Html ()
+blogListItem theme (first blogLink -> (Nothing, _)) = pure $ mempty
+blogListItem theme (first blogLink -> (Just file, time)) = li_ [class_ "blog-link"] $ a_ [href_ $ safeBlogLink theme $ T.unpack file] $ toHtml $ blogNameWithDate file time
+
+blogNameWithDate :: T.Text -> UTCTime -> T.Text
+blogNameWithDate file time = file <> " (last modified: " <> T.pack (formatTime defaultTimeLocale (iso8601DateFormat Nothing) $ utctDay time) <> ")"
 
 blogLink :: T.Text -> Maybe T.Text
 blogLink = T.stripSuffix markdownExtension
@@ -94,10 +104,10 @@ siteTitle :: T.Text
 siteTitle = "Saba's Site"
 
 staticPath :: FilePath
-staticPath = "static/"
+staticPath = "static"
 
 imagePath :: FilePath
-imagePath = staticPath <> "img/"
+imagePath = staticPath </> "img"
 
 markdownExtension :: T.Text
 markdownExtension = ".md"
diff --git a/src/Server.hs b/src/Server.hs
index 12404bd..271f3a1 100644
--- a/src/Server.hs
+++ b/src/Server.hs
@@ -9,6 +9,7 @@ import Lucid
 import RenderBlog (renderBlog)
 import Servant
 import StyleSheet
+import System.FilePath.Posix ((</>))
 import qualified Clay as C
 import qualified Data.ByteString.Lazy as B
 import qualified Data.Text as T
@@ -30,13 +31,13 @@ blogPost :: Maybe Theme -> BlogId -> Handler (Html ())
 blogPost theme blogId = handleAny (blogNotFound theme blogId) $ findBlogPost blogId >>= htmlContainer theme (Just blogId) . renderBlog
 
 findBlogPost :: BlogId -> Handler T.Text
-findBlogPost = liftIO . T.readFile . (<>) staticPath . flip (<>) (T.unpack markdownExtension)
+findBlogPost = liftIO . T.readFile . (</>) staticPath . flip (<>) (T.unpack markdownExtension)
 
 changeTheme :: Theme -> BlogId -> Handler (Html ())
 changeTheme theme = blogPost (Just theme)
 
 imageLink :: ImageId -> Handler B.ByteString
-imageLink imageId = handleAny imageNotFound $ liftIO $ B.readFile $ imagePath <> imageId
+imageLink imageId = handleAny imageNotFound $ liftIO $ B.readFile $ imagePath </> imageId
 
 styling :: Maybe Theme -> Handler C.Css
 styling (fromMaybe defaultTheme -> theme) = pure $ getStyleFromTheme (themeType theme) $ C.rgba (themeRed theme) (themeGreen theme) (themeBlue theme) 1