var Stmt = require('./stmt');
var Holder = require('./holder');

/**
 * Literal SQL string.
 */
module.exports = new Class({
	Extends: Stmt
	,Tag: 'sql-string'
	,Properties: {
		query: {
			type: String
			,value: null
		}
	}

	,regexp: /#\w+/g

	,appendChild: function(child) {
		if (child.nodeType === Node.TEXT_NODE)
			this.query = child.textContent;
	}

	,render: function(params) {
		if (!this.query)
			return null;
			
		function replaceFunc(token) {
			var holder = new Holder({id: token.substr(1)});
			return holder.render(params);
		}

		return this.query.replace(this.regexp, replaceFunc);
	}

	,findHolders: function() {
		var ids = this.query.match(this.regexp);
		
		if (ids)
		for (var i = 0; i < ids.length; i++)
			ids[i] = ids[i].substr(1);
			
		return ids;
	}
});