fix: depth col issue while creating directory

internal/database/migrations/20240728154309_modify.sql

@@ -0,0 +1,48 @@
+-- +goose Up
+-- +goose StatementBegin
+DROP FUNCTION IF EXISTS teldrive.account_stats;
+DROP FUNCTION IF EXISTS teldrive.update_folder;
+
+CREATE OR REPLACE FUNCTION teldrive.create_directories(u_id bigint, long_path text)
+ RETURNS SETOF teldrive.files
+ LANGUAGE plpgsql
+AS $function$
+DECLARE
+    path_parts TEXT[];
+    current_directory_id TEXT;
+    new_directory_id TEXT;
+    directory_name TEXT;
+    path_so_far TEXT;
+BEGIN
+    path_parts := string_to_array(regexp_replace(long_path, '^/+', ''), '/');
+
+    path_so_far := '';
+
+    SELECT id INTO current_directory_id
+    FROM teldrive.files
+    WHERE parent_id = 'root' AND user_id = u_id;
+
+    FOR directory_name IN SELECT unnest(path_parts) LOOP
+        path_so_far := CONCAT(path_so_far, '/', directory_name);
+
+        SELECT id INTO new_directory_id
+        FROM teldrive.files
+        WHERE parent_id = current_directory_id
+          AND "name" = directory_name
+          AND "user_id" = u_id;
+
+        IF new_directory_id IS NULL THEN
+            INSERT INTO teldrive.files ("name", "type", mime_type, parent_id, "user_id", starred)
+            VALUES (directory_name, 'folder', 'drive/folder', current_directory_id, u_id, false)
+            RETURNING id INTO new_directory_id;
+        END IF;
+
+        current_directory_id := new_directory_id;
+    END LOOP;
+
+    RETURN QUERY SELECT * FROM teldrive.files WHERE id = current_directory_id;
+END;
+$function$
+;
+
+-- +goose StatementEnd