@kldit/cms/lib/validators/unique.js

A CMS Framework for @kldit/mvc

const Request = require('@kldit/cms/lib/Request');
const { MQL, MQLtoMySQL } = require.main.require('mql-mysql');

module.exports = async function (cms, fieldName, value, rule, db) // types: 
// full-query: uses the entire query to check if it's unique
// table-query: uses the table query removing joins
// table: just look if in the table exists anyother with the same value
//print_r( $result ); exit;
{
	const type = rule.type !== undefined ? rule.type : "table";
	const request = Request.createRequestFromTarget(
		cms.mapName,
		cms.map,
		cms.path,
		cms.ids,
		db);

	const mql = await request.matrixQueryForSelect(cms);
	const field = request.column(fieldName).field;
	mql[field.from()].addColumn(fieldName, undefined, value, MQL.EQUAL_TO);
	
	var temp = mql.tables[mql.target];

	var id;
	
	if(mql[mql.target].column( temp.id ))
	{
		id = mql.data[mql.target][temp.id].value;
		mql[mql.target].addColumn(temp.id, undefined, undefined, MQL.GET);
	}
	
	if(type != "full-query")
	{
		var from = field.from();
		mql.target = from;
		{
			let _tmp_0 = mql.tables;

			for(var key in _tmp_0)
			{
				var obj = _tmp_0[key];

				if(key != from)
				{
					mql.removeTable(key);
				}
			}
		}
		var data = mql.data[from];

		// TODO: Revise this portion of code
		mql.data[from] = {};
		var table = from == cms.mapName ? cms.map.tables.main : cms.map.tables[from];
		var where = undefined !== table.where ? table.where : [];
		
		for(var key in data)
		{
			var item = data[key];

			if(type == "table-query" && -1 !== where.indexOf(key) || key == fieldName)
			{
				mql.data[from][key] = item;
			}
		}
		console.log( table );
		mql[from].addColumn(table.id, undefined, "", MQL.GET);
	}
	
	const [rows, fields] = await MQLtoMySQL.select(mql, db);
	
	if(rows && rows.length > 0)
	{
		for(var item of rows)
		{
			if(item.id != id) return false;
		}

		return true;
	}
	else return true;

	return !(rows.length > 0);
};