node-qsb/index.js

Node.js Simple Database Query String Builder (QSB) for MySQL/MariaDB

function bq(str) { 
	if(str.indexOf('.') > 0) {
		str = str.split('.');
		return "`" + str[0] + "`.`" + str[1] + "`";  
	}
	return "`" + str + "`"; 
}	//add Back Quote
function esc(str) {
	if(typeof(str) !== "string")
		str = "" + str;
	str = str.replace(/[\0\n\r\b\t\\\'\"\x1a]/g, function(res) {
		switch(res) {
			case "\0": return "\\0";
			case "\n": return "\\n";
			case "\r": return "\\r";
			case "\b": return "\\b";
			case "\t": return "\\t";
			case "\x1a": return "\\Z";
		default: return "\\"+res;
		}
	});
	return "'"+str+"'";
}	//apply Esapce Character

module.exports = function() {
	this._comm = "";
	this._get = "";
	this._cols = "";
	this._values = "";
	this._set = "";
	this._from = "";
	this._join = "";
	this._where = "";
	this._limit = "";
	this._order = "";
  this._group = "";
	this._qs = "SELECT 'QUERY NOT BUILD'";
};

module.exports.prototype.forceQuery = function(query) {
	this._qs = query;
	return this;
};

module.exports.prototype.select = function(from, short) {
	if(this._from.length !== 0) { this._from += ", "; }
	if(this._from.length === 0) { this._from = " FROM "; }
	this._comm = "SELECT ";
	this._from += bq(from);
	if(short !== undefined) { this._from += " " + bq(short); }
	return this;
};

module.exports.prototype.update = function(table) {
	this._comm = "UPDATE ";
	this._from = bq(table);
	return this;
};

module.exports.prototype.insert = function(table) {
	this._comm = "INSERT ";
	this._from = "INTO " + bq(table);
	return this;
};

module.exports.prototype.delete = function(table) {
	this._comm = "DELETE ";
	this._from = "FROM " + bq(table);
	return this;
};

module.exports.prototype.join = function(table, short) {
	this._join += " JOIN " + bq(table);
	if(short !== undefined) { this._join += " " + bq(short); }
	return this;
};

module.exports.prototype.on = function(a, b, c) {
	if(this._on.length !== 0) { this._on += " AND "; }
	if(this._on.length === 0) { this._on += " ON "; }
	this._on += esc(a) + " " + esc(b) + " " + esc(c);
	return this;
};

module.exports.prototype.values = function(cols, values) {
	var i;
	this._cols += "(";
	for(i=0; i<cols.length; i++) {
		this._cols += bq(cols[i]);
		if(i < cols.length - 1) {
			this._cols += ", ";
		}
	}
	this._cols += ")";
	this._values += " VALUES (";
	for(i=0; i<values.length; i++) {
		this._values += esc(values[i]);
		if(i < values.length - 1) {
			this._values += ", ";
		}
	}
	this._values += ")";
	return this;
};

module.exports.prototype.addValues = function(values) {
	this._values += ",(";
	for(var i=0; i<values.length; i++) {
		this._values += esc(values[i]);
		if(i < values.length - 1) {
			this._values += ", ";
		}
	}
	this._values += ")";
	return this;
};

module.exports.prototype.get = function(get) {
	if(this._get.length !== 0) { this._get += ", ";	}
	this._get += bq(get);
	return this;
};

module.exports.prototype.set = function(set, value) {
	if(this._set.length !== 0) { this._set += ", "; }
	if(this._set.length === 0) { this._set += " SET "; }
	this._set += bq(set) + " = " + esc(value);
	return this;
};


module.exports.prototype.where = function(a, b, c) {
	if(this._where.length !== 0) { this._where += " AND "; }
	if(this._where.length === 0) { this._where += " WHERE "; }
	this._where += bq(a) + " " + b + " " + esc(c);
	return this;
};

module.exports.prototype.whereOr = function(a, b, c) {
	if(this._where.length !== 0) { this._where += " OR "; }
	if(this._where.length === 0) { this._where += " WHERE "; }
	this._where += bq(a) + " " + b + " " + esc(c);
	return this;
};

module.exports.prototype.limit = function(a, b) {
	if(this._limit.length === 0) { this._limit += " LIMIT "; }
	this._limit += a + ", " + b;
	return this;
};

module.exports.prototype.orderBy = function(col, sort) {
	if(this._order.length !== 0) { this._order += ", "; }
	if(this._order.length === 0) { this._order += " ORDER BY "; }
	this._order += bq(col) + " " + sort;
	return this;
};

module.exports.prototype.groupBy = function(col) {
	this._group += " GROUP BY " + bq(col);
	return this;
};

module.exports.prototype.build = function() {
	if(this._comm === "SELECT ") { this._qs = this._comm + (this._get.length === 0 ? "*" : this._get) + this._from + this._join + this._where + this._order + this._group + this._limit + ";"; }
	if(this._comm === "UPDATE ") { this._qs = this._comm + this._from + this._set + this._where + ";"; }
	if(this._comm === "INSERT ") { this._qs = this._comm + this._from + this._cols + this._values + ";"; }
	if(this._comm === "DELETE ") { this._qs = this._comm + this._from + this._where + ";"; }
	return this;
};

module.exports.prototype.printObject = function() {
	console.log(this);
	return this;
};

module.exports.prototype.printString = function() {
	console.log(this._qs);
	return this;
};

module.exports.prototype.returnString = function() {
	return this._qs;
};