implement blog tag filtering

1 files changed, 39 insertions, 16 deletions

diff --git a/src/posts/mod.rs b/src/posts/mod.rs
index be1e1a9..2dc5c4b 100644
--- a/src/posts/mod.rs
+++ b/src/posts/mod.rs
@@ -1,3 +1,6 @@
+mod article;
+mod note;
+
 use std::collections::HashSet;
 
 use async_trait::async_trait;
@@ -16,12 +19,6 @@ enum PostType {
     Note,
 }
 
-enum TextFormat {
-    Markdown,
-    Plaintext,
-    Html,
-}
-
 #[derive(Debug)]
 pub struct Post<D: Content> {
     // id: i64,
@@ -34,7 +31,7 @@ pub struct Post<D: Content> {
     data: D,
 }
 
-impl<D: Content + Serialize> Post<D> {
+impl<D: Content> Post<D> {
     pub async fn render(&mut self) -> Result<()> {
         self.render = Some(self.data.render().await?);
         Ok(())
@@ -74,6 +71,8 @@ pub async fn get_blogposts() -> Result<Vec<Post<Article>>> {
         let blogpost = Post::try_from(blogpost).await.unwrap();
         blogposts.push(blogpost);
     }
+    blogposts.sort_by_key(|post| post.created_at);
+    blogposts.reverse();
     Ok(blogposts)
 }
 
@@ -87,21 +86,45 @@ pub async fn get_blogpost(post_name: &str) -> Result<Post<Article>> {
                 path: file.path().to_str().unwrap_or_default().to_owned(),
                 name: name.to_owned(),
             };
-            let blogpost = Post::try_from(blogpost).await.unwrap();
+            let blogpost = Post::try_from(blogpost).await?;
             return Ok(blogpost);
         }
     }
     Err(BlossomError::NotFound(Status::new(404)))
 }
 
-pub fn get_tags<D: Content>(posts: &Vec<Post<D>>) -> HashSet<String> {
-    posts.into_iter().fold(HashSet::new(), |mut acc, post| {
-        let tags = &post.tags;
-        for tag in tags {
-            acc.insert(tag.to_owned());
-        }
-        acc
-    })
+pub fn get_tags<D: Content>(posts: &Vec<Post<D>>) -> Vec<&String> {
+    let mut tags = posts
+        .into_iter()
+        .fold(HashSet::new(), |mut acc, post| {
+            let tags = &post.tags;
+            for tag in tags {
+                acc.insert(tag);
+            }
+            acc
+        })
+        .into_iter()
+        .collect::<Vec<_>>();
+    tags.sort();
+    tags
+}
+
+pub fn filter_by_tags<'p, D: Content>(
+    posts: Vec<Post<D>>,
+    filter_tags: &HashSet<String>,
+) -> Vec<Post<D>> {
+    posts
+        .into_iter()
+        .filter(|post| {
+            for tag in &post.tags {
+                match filter_tags.contains(tag) {
+                    true => return true,
+                    false => continue,
+                }
+            }
+            false
+        })
+        .collect()
 }
 
 #[async_trait]