added comment index pagination, added author routes

backend/public/src/datasources/authors.rs

@@ -1,2 +1,31 @@
+use sqlx::{Pool, Postgres};
+
+use crate::routes::{authors::Author, comments::Pagination};
+
 pub struct AuthorsDatasource;
-impl AuthorsDatasource {}
+impl AuthorsDatasource {
+    pub async fn get_all(
+        pool: &Pool<Postgres>,
+        pagination: Pagination,
+    ) -> Result<Vec<Author>, sqlx::Error> {
+        let offset: i64 = (pagination.page_number - 1) * pagination.page_size;
+        sqlx::query_as!(
+            Author,
+            "SELECT author_id, first_name, last_name, bio FROM authors ORDER BY created_at DESC LIMIT $1 OFFSET $2",
+            pagination.page_size,
+            offset,
+        )
+        .fetch_all(pool)
+        .await
+    }
+
+    pub async fn get_one(pool: &Pool<Postgres>, author_id: i32) -> Result<Author, sqlx::Error> {
+        sqlx::query_as!(
+            Author,
+            "SELECT author_id, first_name, last_name, bio FROM authors WHERE author_id = $1",
+            author_id
+        )
+        .fetch_one(pool)
+        .await
+    }
+}

backend/public/src/datasources/comments.rs

@@ -1,4 +1,4 @@
-use crate::routes::comments::{Comment, CommentInputPayload};
+use crate::routes::comments::{Comment, CommentInputPayload, Pagination};
 use sqlx::{Pool, Postgres};
 
 pub struct CommentsDatasource;
@@ -11,12 +11,23 @@ impl CommentsDatasource {
             .fetch_all(pool)
             .await
     }
+
     pub async fn insert_comment(
         pool: &Pool<Postgres>,
         comment_input: CommentInputPayload,
     ) -> Result<Comment, sqlx::Error> {
-        sqlx::query!("INSERT INTO comments (post_id, name, body) VALUES ($1, $2, $3) RETURNING comment_id, name, body, created_at", comment_input.post_id, comment_input.name, comment_input.body)
+        sqlx::query_as!(Comment, "INSERT INTO comments (post_id, name, body) VALUES ($1, $2, $3) RETURNING comment_id, name, body, created_at", comment_input.post_id, comment_input.name, comment_input.body)
             .fetch_one(pool)
             .await
     }
+
+    pub async fn get_index_comments(
+        pool: &Pool<Postgres>,
+        pagination: Pagination,
+    ) -> Result<Vec<Comment>, sqlx::Error> {
+        let offset: i64 = (pagination.page_number - 1) * pagination.page_size;
+        sqlx::query_as!(Comment, "SELECT comment_id, name, body, created_at FROM comments ORDER BY created_at DESC LIMIT $1 OFFSET $2", pagination.page_size, offset)
+            .fetch_all(pool)
+            .await
+    }
 }