/
metadata.ts
51 lines (47 loc) · 1.73 KB
/
metadata.ts
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import { TypeDecorator } from './type-decorator';
import { UpdateQuery } from './../../helpers/update-query';
let debug = require('debug')('deco-api:decorators:types:metadata');
export interface Metadata {
key: string;
value: any;
type?: string;
}
export let inputMetadata = (value: any, options: any) => {
if (value === 'null') value = undefined;
if (value === 'undefined') value = undefined;
if (value === null) value = undefined;
return value;
};
export let validateMetadata = (value: any, options: any) => {
if (value === null) return true;
if (value === undefined) return true;
if (value === 'null') return true;
if (!Array.isArray(value)) return false;
let allowedKeys = ['key', 'value', 'type'];
for (let data of value) {
if (typeof data !== 'object') return false;
let keys = Object.keys(data);
for (let key of keys) {
if (allowedKeys.indexOf(key) === -1) return false;
}
if (data.key === undefined) return false;
if (data.value === undefined) return false;
}
return true;
}
export let metadataDecorator = new TypeDecorator('metadata');
metadataDecorator.input = (key: string, value: any, options: any, target: any) => {
return Promise.resolve(inputMetadata(value, options));
};
metadataDecorator.validate = (value: any, obj: any, options: any) => {
return validateMetadata(value, options);
};
metadataDecorator.toDocument = (updateQuery: UpdateQuery, key: string, value: any, operation: 'insert' | 'update' | 'upsert', options: any, element: any, target: any) => {
if (value === null || value === undefined || value === 'null') {
updateQuery.unset(key, '');
} else {
updateQuery.set(key, value);
}
return Promise.resolve();
}
export const metadata = metadataDecorator.decorator();