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;
	}
});