show top tags on index page

axum_server/src/main.rs

@@ -10,6 +10,7 @@ mod pages;
 mod post_list;
 mod post_parser;
 mod router;
+mod tag_list;
 // mod template;
 
 #[tokio::main]

axum_server/src/pages/index.rs

@@ -1,8 +1,12 @@
 use askama::Template;
+use axum::http::StatusCode;
 
-use crate::components::{
-    site_footer::{render_site_footer, SiteFooter},
-    site_header::HeaderProps,
+use crate::{
+    components::{
+        site_footer::{render_site_footer, SiteFooter},
+        site_header::HeaderProps,
+    },
+    tag_list::get_popular_blog_tags,
 };
 
 #[derive(Template)]
@@ -10,12 +14,24 @@ use crate::components::{
 pub struct IndexTemplate {
     site_footer: SiteFooter,
     header_props: HeaderProps,
+    blog_tags: Vec<String>,
 }
 
-pub async fn render_index() -> IndexTemplate {
-    let site_footer = render_site_footer().await;
-    IndexTemplate {
+pub async fn render_index() -> Result<IndexTemplate, StatusCode> {
+    let site_footer = tokio::spawn(render_site_footer());
+    let blog_tags = tokio::spawn(get_popular_blog_tags());
+
+    let blog_tags = blog_tags
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)??;
+
+    let site_footer = site_footer
+        .await
+        .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
+
+    Ok(IndexTemplate {
         site_footer,
         header_props: HeaderProps::default(),
-    }
+        blog_tags,
+    })
 }

axum_server/src/pages/post_list.rs

@@ -51,7 +51,6 @@ pub async fn render_post_list(tag: Option<Path<String>>) -> Result<PostListTempl
         .await
         .map_err(|_| StatusCode::INTERNAL_SERVER_ERROR)?;
 
-    // TODO if we have a tag we want to go back to all posts, otherwise we don't
     let header_props = match tag {
         Some(_) => HeaderProps::with_back_link(Link {
             href: "/blog".to_string(),
@@ -68,6 +67,3 @@ pub async fn render_post_list(tag: Option<Path<String>>) -> Result<PostListTempl
         header_props,
     })
 }
-
-// TODO Do we want pagination or not? Ask designer/ We don't want itt
-// TODO when tags are true render different "see all post" message

axum_server/src/tag_list.rs

@@ -0,0 +1,34 @@
+use crate::{pages::post::PostMetadata, post_list::get_post_list};
+use axum::http::StatusCode;
+use std::collections::HashMap;
+use tracing::debug;
+
+pub async fn get_popular_blog_tags() -> Result<Vec<String>, StatusCode> {
+    const TAGS_LENGTH: usize = 7;
+
+    let post_list = get_post_list::<PostMetadata>().await?;
+    let tags_sum = post_list
+        .into_iter()
+        .flat_map(|post| post.metadata.tags)
+        .fold(HashMap::new(), |mut acc, tag| {
+            *acc.entry(tag).or_insert(0) += 1;
+            acc
+        });
+
+    let mut sorted_tags_by_count: Vec<_> = tags_sum.into_iter().collect();
+    sorted_tags_by_count.sort_by_key(|&(_, count)| std::cmp::Reverse(count));
+
+    // Log the counts
+    for (tag, count) in &sorted_tags_by_count {
+        debug!("Tag: {}, Count: {}", tag, count);
+    }
+
+    let popular_blog_tags = sorted_tags_by_count
+        .into_iter()
+        .map(|tag_count| tag_count.0)
+        .filter(|tag| tag != "dev")
+        .take(TAGS_LENGTH)
+        .collect::<Vec<String>>();
+
+    Ok(popular_blog_tags)
+}