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/*
Fosscord: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Fosscord and Fosscord Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import Ajv from "ajv";
import addFormats from "ajv-formats";
import fs from "fs";
import path from "path";
const SchemaPath = path.join(
__dirname,
"..",
"..",
"..",
"assets",
"schemas.json",
);
const schemas = JSON.parse(fs.readFileSync(SchemaPath, { encoding: "utf8" }));
export const ajv = new Ajv({
allErrors: true,
parseDate: true,
allowDate: true,
schemas,
coerceTypes: true,
messages: true,
strict: true,
strictRequired: true,
allowUnionTypes: true,
});
addFormats(ajv);
export function validateSchema<G extends object>(schema: string, data: G): G {
const valid = ajv.validate(schema, normalizeBody(data));
if (!valid) throw ajv.errors;
return data;
}
// Normalizer is introduced to workaround https://github.com/ajv-validator/ajv/issues/1287
// this removes null values as ajv doesn't treat them as undefined
// normalizeBody allows to handle circular structures without issues
// taken from https://github.com/serverless/serverless/blob/master/lib/classes/ConfigSchemaHandler/index.js#L30 (MIT license)
export const normalizeBody = (body: object = {}) => {
const normalizedObjectsSet = new WeakSet();
const normalizeObject = (object: object) => {
if (normalizedObjectsSet.has(object)) return;
normalizedObjectsSet.add(object);
if (Array.isArray(object)) {
for (const [, value] of object.entries()) {
if (typeof value === "object") normalizeObject(value);
}
} else {
for (const [key, value] of Object.entries(object)) {
if (value == null) {
if (
key === "icon" ||
key === "avatar" ||
key === "banner" ||
key === "splash" ||
key === "discovery_splash"
)
continue;
// eslint-disable-next-line @typescript-eslint/ban-ts-comment
//@ts-ignore
delete object[key];
} else if (typeof value === "object") {
normalizeObject(value);
}
}
}
};
normalizeObject(body);
return body;
};
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