Add feed model, link items to feeds

src/models/feed.rs

@@ -0,0 +1,109 @@
+use chrono::NaiveDateTime;
+use serde::{Deserialize, Serialize};
+use sqlx::PgPool;
+use validator::Validate;
+
+use crate::error::{Error, Result};
+
+#[derive(Debug, Serialize, Deserialize, sqlx::Type)]
+#[sqlx(type_name = "feed_type", rename_all = "lowercase")]
+#[serde(rename_all = "lowercase")]
+pub enum FeedType {
+    Atom,
+    Rss,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Feed {
+    id: i32,
+    title: String,
+    url: String,
+    #[serde(rename = "type")]
+    feed_type: FeedType,
+    description: Option<String>,
+    created_at: NaiveDateTime,
+    updated_at: NaiveDateTime,
+    deleted_at: Option<NaiveDateTime>,
+}
+
+#[derive(Debug, Deserialize, Validate)]
+pub struct CreateFeed {
+    #[validate(length(max = 255))]
+    title: String,
+    #[validate(url)]
+    url: String,
+    #[serde(rename = "type")]
+    feed_type: FeedType,
+    #[validate(length(max = 524288))]
+    description: Option<String>,
+}
+
+pub async fn get_feed(pool: PgPool, id: i32) -> Result<Feed> {
+    sqlx::query_as!(
+        Feed,
+        // Unable to SELECT * here due to https://github.com/launchbadge/sqlx/issues/1004
+        r#"SELECT
+            id,
+            title,
+            url,
+            type as "feed_type: FeedType",
+            description,
+            created_at,
+            updated_at,
+            deleted_at
+        FROM feeds WHERE id = $1"#,
+        id
+    )
+    .fetch_one(&pool)
+    .await
+    .map_err(|error| {
+        if let sqlx::error::Error::RowNotFound = error {
+            return Error::NotFound("feed", id);
+        }
+        Error::Sqlx(error)
+    })
+}
+
+pub async fn get_feeds(pool: PgPool) -> sqlx::Result<Vec<Feed>> {
+    sqlx::query_as!(
+        Feed,
+        r#"SELECT
+            id,
+            title,
+            url,
+            type as "feed_type: FeedType",
+            description,
+            created_at,
+            updated_at,
+            deleted_at
+        FROM feeds"#)
+        .fetch_all(&pool)
+        .await
+}
+
+pub async fn create_feed(pool: PgPool, payload: CreateFeed) -> Result<Feed> {
+    payload.validate()?;
+    Ok(sqlx::query_as!(
+        Feed,
+        r#"INSERT INTO feeds (
+            title, url, type, description, created_at, updated_at
+        ) VALUES (
+            $1, $2, $3, $4, now(), now()
+        ) RETURNING
+            id,
+            title,
+            url,
+            type as "feed_type: FeedType",
+            description,
+            created_at,
+            updated_at,
+            deleted_at
+        "#,
+        payload.title,
+        payload.url,
+        payload.feed_type as FeedType,
+        payload.description
+    )
+    .fetch_one(&pool)
+    .await?)
+}