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rules.js
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rules.js
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var Immutable = require('immutable');
var is = require('is');
var inherits = require('util').inherits;
var Rule = require('./rule');
var RulesSetRecord = Immutable.Record({
rules: new Immutable.List()
});
function RulesSet(rules) {
if (!(this instanceof RulesSet)) return new RulesSet(rules);
rules = RulesList(rules);
RulesSetRecord.call(this, {
rules: rules
});
}
inherits(RulesSet, RulesSetRecord);
// ---- GETTERS ----
RulesSet.prototype.getRules = function() {
return this.get('rules');
};
// ---- METHODS ----
/**
* Add a rule / or rules
* @param {Rule|RulesSet|Array} rules
* @return {RulesSet}
*/
RulesSet.prototype.add = function(newRules) {
var rules = this.getRules();
// Prepare new rules
newRules = RulesList(newRules);
// Concat rules
rules = newRules.concat(rules);
return this.set('rules', rules);
};
/**
* Add a rule / or rules at the beginning
* @param {Rule|RulesSet|Array} rules
* @return {RulesSet}
*/
RulesSet.prototype.unshift = function(newRules) {
var rules = this.getRules();
// Prepare new rules
newRules = RulesList(newRules);
// Add rules
rules = rules.unshift.apply(rules, newRules.toArray());
return this.set('rules', rules);
};
/**
* Remove a rule by its type
* @param {String} ruleType
* @return {RulesSet}
*/
RulesSet.prototype.del = function(ruleType) {
var rules = this.getRules();
rules = rules.filterNot(function(rule) {
return rule.getType() == ruleType;
});
return this.set('rules', rules);
};
/**
* Replace a rule type by a new rule
* @param {Rule} rule
* @return {RulesSet}
*/
RulesSet.prototype.replace = function(rule) {
return this
.del(rule.getType())
.add(rule);
};
/**
* Get a specific rule using its type
* @param {String} ruleType
* @return {Rule}
*/
RulesSet.prototype.getRule = function(ruleType) {
var rules = this.getRules();
return rules.find(function(rule) {
return rule.getType() == ruleType;
});
};
/**
* Build a list of rules
* @param {Rule|RulesSet|Array} rules
* @return {List<Rule>}
*/
function RulesList(rules) {
if (rules instanceof Rule) {
return new Immutable.List([rules]);
}
if (is.array(rules)) {
return new Immutable.List(rules);
}
if (rules instanceof RulesSet) {
return rules.getRules();
}
return rules || new Immutable.List();
}
module.exports = RulesSet;