downloads route (#713)

src/clickhouse/fetch.rs

@@ -29,6 +29,13 @@ pub struct ReturnViews {
     pub total_views: u64,
 }
 
+#[derive(clickhouse::Row, Serialize, Deserialize, Clone, Debug)]
+pub struct ReturnDownloads {
+    pub time: u64,
+    pub id: u64,
+    pub total_downloads: u64,
+}
+
 // Only one of project_id or version_id should be used
 // Fetches playtimes as a Vec of ReturnPlaytimes
 pub async fn fetch_playtimes(
@@ -125,6 +132,53 @@ pub async fn fetch_views(
     Ok(query.fetch_all().await?)
 }
 
+// Fetches downloads as a Vec of ReturnDownloads
+pub async fn fetch_downloads(
+    projects: Option<Vec<ProjectId>>,
+    versions: Option<Vec<VersionId>>,
+    start_date: NaiveDate,
+    end_date: NaiveDate,
+    resolution_minutes: u32,
+    client: Arc<clickhouse::Client>,
+) -> Result<Vec<ReturnDownloads>, ApiError> {
+    let project_or_version = if projects.is_some() && versions.is_none() {
+        "project_id"
+    } else if versions.is_some() {
+        "version_id"
+    } else {
+        return Err(ApiError::InvalidInput(
+            "Only one of 'project_id' or 'version_id' should be used.".to_string(),
+        ));
+    };
+
+    let mut query = client
+        .query(&format!(
+            "
+            SELECT  
+                toYYYYMMDDhhmmss((toStartOfInterval(recorded, toIntervalMinute(?)) AS time)),
+                {project_or_version},
+                count(id) AS total_downloads
+            FROM downloads
+            WHERE time >= toDate(?) AND time <= toDate(?)
+            AND {project_or_version} IN ? 
+            GROUP BY
+            time,
+        {project_or_version}
+                    "
+        ))
+        .bind(resolution_minutes)
+        .bind(start_date)
+        .bind(end_date);
+
+    if projects.is_some() {
+        query = query.bind(projects.unwrap().iter().map(|x| x.0).collect::<Vec<_>>());
+    } else if versions.is_some() {
+        query = query.bind(versions.unwrap().iter().map(|x| x.0).collect::<Vec<_>>());
+    }
+
+    Ok(query.fetch_all().await?)
+}
+
 // Fetches countries as a Vec of ReturnCountry
 pub async fn fetch_countries(
     projects: Option<Vec<ProjectId>>,