add MiUserProfile.defaultCW property and API

packages/backend/src/server/api/endpoints/i/update.ts

@@ -133,6 +133,12 @@ export const meta = {
 			id: '0b3f9f6a-2f4d-4b1f-9fb4-49d3a2fd7191',
 			httpStatusCode: 422,
 		},
+
+		maxCwLength: {
+			message: 'You tried setting a default content warning which is too long.',
+			code: 'MAX_CW_LENGTH',
+			id: '7004c478-bda3-4b4f-acb2-4316398c9d52',
+		},
 	},
 
 	res: {
@@ -243,6 +249,7 @@ export const paramDef = {
 			uniqueItems: true,
 			items: { type: 'string' },
 		},
+		defaultCW: { type: 'string', nullable: true },
 	},
 } as const;
 
@@ -494,6 +501,16 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				updates.alsoKnownAs = newAlsoKnownAs.size > 0 ? Array.from(newAlsoKnownAs) : null;
 			}
 
+			let defaultCW = ps.defaultCW;
+			if (defaultCW !== undefined) {
+				if (defaultCW === '') defaultCW = null;
+				if (defaultCW && defaultCW.length > this.config.maxCwLength) {
+					throw new ApiError(meta.errors.maxCwLength);
+				}
+
+				profileUpdates.defaultCW = defaultCW;
+			}
+
 			//#region emojis/tags
 
 			let emojis = [] as string[];