Add migration script

migrations/20240210133900_macro_restructure.sql

@@ -0,0 +1,43 @@
+CREATE TABLE command_macro (
+    id INT UNSIGNED AUTO_INCREMENT,
+    guild_id INT UNSIGNED NOT NULL,
+
+    name VARCHAR(100) NOT NULL,
+    description VARCHAR(100),
+    commands JSON NOT NULL,
+
+    FOREIGN KEY (guild_id) REFERENCES guilds(id) ON DELETE CASCADE,
+    PRIMARY KEY (id)
+);
+
+# New JSON structure is {command_name: "Remind", "<option name>": "<option value>", ...}
+INSERT INTO command_macro (guild_id, description, name, commands)
+SELECT
+    guild_id,
+    description,
+    name,
+    (
+        SELECT JSON_ARRAYAGG(
+            JSON_MERGE_PATCH(
+                '{}',
+                (
+                    SELECT JSON_OBJECTAGG(t2.name, t2.value)
+                    FROM JSON_TABLE(
+                        JSON_ARRAY_APPEND(t1.options, '$', JSON_OBJECT('name', 'command_name', 'value', t1.command_name)),
+                        '$[*]' COLUMNS (
+                            name VARCHAR(64) PATH '$.name' ERROR ON ERROR,
+                            value TEXT PATH '$.value' ERROR ON ERROR
+                        )) AS t2
+                )
+            )
+        )
+        FROM macro m2
+        JOIN JSON_TABLE(
+            commands,
+            '$[*]' COLUMNS (
+                command_name VARCHAR(64) PATH '$.command_name' ERROR ON ERROR,
+                options JSON PATH '$.options' ERROR ON ERROR
+            )) AS t1
+        WHERE m1.id = m2.id
+    )
+FROM macro m1;