refactor: use ajv instead of cafy (#8324)

* wip

* wip

* Update abuse-user-reports.ts

* Update files.ts

* Update list-remote.ts

* Update list.ts

* Update show-users.ts

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update update.ts

* Update search.ts

* Update reactions.ts

* Update search.ts

* wip

* wip

* wip

* wip

* Update update.ts

* Update relation.ts

* Update available.ts

* wip

* wip

* wip

* Update packages/backend/src/server/api/define.ts

Co-authored-by: Johann150 <johann.galle@protonmail.com>

* Update define.ts

* Update define.ts

* typo

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* Update update.ts

* wip

* Update signup.ts

* Update call.ts

* minimum for limit

* type

* remove needless annotation

* wip

* Update signup.ts

* wip

* wip

* fix

* Update create.ts

Co-authored-by: Johann150 <johann.galle@protonmail.com>

packages/backend/src/services/chart/core.ts

@@ -82,6 +82,38 @@ type Unflatten<T extends Record<string, any>> = UnionToIntersection<
 	}[Extract<keyof T, string>]
 >;
 
+type ToJsonSchema<S> = {
+	type: 'object';
+	properties: {
+		[K in keyof S]: S[K] extends number[] ? { type: 'array'; items: { type: 'number'; }; } : ToJsonSchema<S[K]>;
+	},
+	required: (keyof S)[];
+};
+
+export function getJsonSchema<S extends Schema>(schema: S): ToJsonSchema<Unflatten<ChartResult<S>>> {
+	const object = {};
+	for (const [k, v] of Object.entries(schema)) {
+		nestedProperty.set(object, k, null);
+	}
+
+	function f(obj: Record<string, null | Record<string, unknown>>) {
+		const jsonSchema = {
+			type: 'object',
+			properties: {} as Record<string, unknown>,
+			required: [],
+		};
+		for (const [k, v] of Object.entries(obj)) {
+			jsonSchema.properties[k] = v === null ? {
+				type: 'array',
+				items: { type: 'number' },
+			} : f(v as Record<string, null | Record<string, unknown>>);
+		}
+		return jsonSchema;
+	}
+
+	return f(object) as ToJsonSchema<Unflatten<ChartResult<S>>>;
+}
+
 /**
  * 様々なチャートの管理を司るクラス
  */