access-strategy.js
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access-strategy.js
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	var Sealious = require("../main.js");
	var Promise = require("bluebird");
	var Chip = require("./chip.js");

	function AccessStrategy (declaration) {
	if (typeof declaration.name != "string") {
	throw new Sealious.Errors.DeveloperError("Access strategy declaration has an invalid or missing `name` attribute");
	}
	Chip.call(this, true, "access_strategy", declaration.name);
	this.checker_function = null;
	this.item_sensitive = false;
	if (declaration) this._process_declaration(declaration);
	}

	AccessStrategy.prototype = new function(){

	this._process_declaration = function(declaration){
	this.checker_function = declaration.checker_function === undefined ? null : declaration.checker_function;
	if (declaration.item_sensitive !== undefined) {
	this.item_sensitive = declaration.item_sensitive;
	}
	}

	this.set_checker_function = function(checker_function){
	this.checker_function = checker_function;
	}

	this.check = function(context, item){
	var arguments_to_check_function = arguments;
	return this.checker_function.apply(this, arguments_to_check_function)
	.then(function(){
	return Promise.resolve(item);
	}).catch(function(error_message){
	if (typeof error_message == "string") {
	return Promise.reject(new Sealious.Errors.BadContext(error_message));
	} else {
	return Promise.reject(error_message);
	}
	});
	}
	}

	AccessStrategy.type_name = "access_strategy";

	module.exports = AccessStrategy;