ts-db-helper/src/core/models/queries/raw-query.js

Simple ORM based on TypeScript

import { QueryError } from '../../errors/query.error';
import { QueryManager } from '../../managers/query-manager';
import { DbQuery } from '../db-query.model';
/**
 * @public
 * @function RawQuery
 *
 * @description
 * this function allow integrators to make RawQuery, any query not permitted
 * by the current api will be able here
 *
 * @param {string} query        the query string
 * @param {Array<any>} params   the query paraeters
 * @param {number} size         optional result size
 * @param {number} page         optional result page
 *
 * @return {Object} query object to execute with 'exec()' method
 */
export function RawQuery(query, params, size, page) {
    var types = ['PRAGMA', 'ALTER', 'DROP', 'CREATE', 'SELECT', 'UPDATE', 'INSERT', 'DELETE'];
    var dbQuery = new DbQuery();
    dbQuery.query = query;
    dbQuery.params = params;
    dbQuery.size = size || 1000;
    dbQuery.page = page || 0;
    var trimedQuery = query.trim();
    var firstWord = trimedQuery.substr(0, trimedQuery.indexOf(' '));
    firstWord = firstWord ? firstWord.toUpperCase() : '';
    if (firstWord && types.indexOf(firstWord[0])) {
        dbQuery.type = firstWord;
    }
    else {
        throw new QueryError('Unsupported raw query', query, params.join(', '));
    }
    var q = {
        /**
         * @public
         * @method exec to execute the query and asynchronously retreive result.
         *
         * @return observable to subscribe
         */
        exec: function () {
            return QueryManager.getInstance().query(dbQuery);
        }
    };
    return q;
}
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