miridoo-js-orm/sgbd/Functions.js

miridoo javascript orm for database

module.exports = function(){

    this.tableName = '';
    this.tableAliasName = '';

    this.expr = [];
    var self = this;

    this.getRefName = function(arguments){
        return (typeof arguments == 'string')? this.tableAliasName+'.'+arguments : Array.from(arguments).map(function(value, index){
            if(typeof value != 'string')
                return value;
            else if(!(/[^a-zA-Z0-9_$]/.test(value)))
                return self.tableAliasName+'.'+value;
            return '"'+(value.replace(/^\+/, ''))+'"';
        });
    };
    this.append = function (str) {
        this.expr.push(str);
        return this;
    };

    this.sum = function(colname){
        return this.append('SUM('+this.getRefName(colname)+')');
    };

    this.count = function(colname){
        return this.append('COUNT('+this.getRefName(colname)+')');
    };

    this.min = function(colname){
        return this.append('MIN('+this.getRefName(colname)+')');
    };

    this.max = function(colname){
        return this.append('MAX('+this.getRefName(colname)+')');
    };

    this.avg = function(){
        return this.append('AVG('+this.getRefName(arguments).join('+')+')');
    };

    this.concat = function(){
        return this.append('CONCAT('+this.getRefName(arguments).join(', ')+')');
    };

    this.toUpperCase = function(colname){
        return this.append('UPPER('+this.getRefName(colname)+')');
    };

    this.toLowerCase = function(colname){
        return this.append('LOWER('+this.getRefName(colname)+')');
    };

    this.month = function(colname){
        return this.append('MONTH('+this.getRefName(colname)+')');
    };

    this.year = function(colname){
        return this.append('YEAR('+this.getRefName(colname)+')');
    };

    this.day = function(colname){
        return this.append('DAY('+this.getRefName(colname)+')');
    };

    this.dayCount = function(colname){
        return this.append('TO_DAYS('+this.getRefName(colname)+')');
    };

    this.datediff = function(colname){
        return this.append('DATEDIFF('+this.getRefName(colname)+')');
    };

    this.hour = function(){
        return this.append('HOUR('+this.getRefName(colname)+')');
    };

    this.timediff = function(colname){
        return this.append('TIMEDIFF('+this.getRefName(colname)+')');
    };

    this.now = function(){
        return this.append('NOW()');
    };


    this.as = function(name){
        this.expr[this.expr.length-1] += ' AS '+name;
        return this;
    };

    this.toString = function(){
        return this.expr.join(', ');
    };
    this.toArray = function(){
        return this.expr;
    };
};