Rewrote user warnings backend.

database/2023_07_26_210150_redo_warnings_table.php

@@ -0,0 +1,43 @@
+<?php
+use Index\Data\IDbConnection;
+use Index\Data\Migration\IDbMigration;
+
+final class RedoWarningsTable_20230726_210150 implements IDbMigration {
+    public function migrate(IDbConnection $conn): void {
+        $conn->execute('
+            CREATE TABLE msz_users_warnings (
+                warn_id      INT(10) UNSIGNED NOT NULL AUTO_INCREMENT,
+                user_id      INT(10) UNSIGNED NOT NULL,
+                mod_id       INT(10) UNSIGNED     NULL DEFAULT NULL,
+                warn_body    TEXT             NOT NULL,
+                warn_created TIMESTAMP        NOT NULL DEFAULT current_timestamp(),
+                PRIMARY KEY (warn_id),
+                KEY users_warnings_user_foreign (user_id),
+                KEY users_warnings_mod_foreign (mod_id),
+                KEY users_warnings_created_index (warn_created),
+                CONSTRAINT users_warnings_user_foreign
+                    FOREIGN KEY (user_id)
+                    REFERENCES msz_users (user_id)
+                    ON UPDATE CASCADE
+                    ON DELETE CASCADE,
+                CONSTRAINT users_warnings_mod_foreign
+                    FOREIGN KEY (mod_id)
+                    REFERENCES msz_users (user_id)
+                    ON UPDATE CASCADE
+                    ON DELETE SET NULL
+            ) ENGINE=InnoDB COLLATE=utf8mb4_bin
+        ');
+
+        // migrate existing warnings, public and private note have been merged but that's fine in prod
+        // still specifying type = 1 as well even though that should be the only type remaining
+        $conn->execute('
+            INSERT INTO msz_users_warnings (user_id, mod_id, warn_body, warn_created)
+            SELECT user_id, issuer_id, TRIM(CONCAT(COALESCE(warning_note, ""), "\n", COALESCE(warning_note_private, ""))), warning_created
+            FROM msz_user_warnings
+            WHERE warning_type = 1
+        ');
+
+        // drop the old table with non-plural "user"
+        $conn->execute('DROP TABLE msz_user_warnings');
+    }
+}