fix: environment_type_trends table data (#6796)

Creates a migration to fix the environment_type_trends table data.


---------

Signed-off-by: andreas-unleash <andreas@getunleash.ai>
Co-authored-by: sjaanus <sellinjaanus@gmail.com>

src/migrations/20240408104624-fix-environment-type-trends.js

@@ -0,0 +1,67 @@
+exports.up = function (db, cb) {
+    db.runSql(
+        `
+    -- 1. Clear the environment_type_trends table
+    TRUNCATE TABLE environment_type_trends;
+
+    -- 2. Prepare staging table
+    with staging_environment_type_trends as (
+        SELECT
+            seu.day,
+            e.type AS environment_type,
+            SUM(seu.updates) AS total_updates
+        FROM
+            stat_environment_updates AS seu
+                JOIN
+            environments AS e ON seu.environment = e.name
+        GROUP BY
+            seu.day,
+            e.type
+        ORDER BY
+            seu.day,
+            e.type
+    ),
+    -- 3. Aggregate per week
+    set as (
+          SELECT
+                 environment_type,
+                 SUM(total_updates) AS total_updates,
+                 date_trunc('week', day) AS week_start,
+                 CONCAT(EXTRACT(YEAR FROM date_trunc('week', day))::TEXT, '-', LPAD(EXTRACT(WEEK FROM date_trunc('week', day))::TEXT, 2, '0')) AS id
+             FROM
+                 staging_environment_type_trends
+             GROUP BY
+                 environment_type,
+                 date_trunc('week', day)
+    ),
+    -- 4. Find correlating created dates
+    created as (
+        select distinct id, created_at from flag_trends
+    )
+    -- 5. Insert aggregated data with dates into environment_type_trends
+    INSERT INTO environment_type_trends (id, environment_type, total_updates, created_at)
+    SELECT
+        CONCAT(EXTRACT(YEAR FROM set.week_start)::TEXT, '-', LPAD(EXTRACT(WEEK FROM set.week_start)::TEXT, 2, '0')) AS id,
+        set.environment_type,
+        SUM(set.total_updates) AS total_updates,
+        created.created_at
+    FROM set
+        JOIN created ON set.id = created.id
+    GROUP BY
+        set.environment_type,
+        set.week_start,
+        created.created_at
+    ORDER BY
+        set.week_start;
+        `,
+        cb,
+    );
+};
+
+exports.down = function (db, cb) {
+    db.runSql(
+        `
+        `,
+        cb,
+    );
+};