72 lines
No EOL
1.7 KiB
JavaScript
72 lines
No EOL
1.7 KiB
JavaScript
/**
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* Specialized class for conducting an HTTP poll, while properly preventing multiple calls.
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*/
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angular.module('quay').factory('AngularPollChannel', ['ApiService', '$timeout', function(ApiService, $timeout) {
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var _PollChannel = function(scope, requester, opt_sleeptime) {
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this.scope_ = scope;
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this.requester_ = requester;
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this.sleeptime_ = opt_sleeptime || (60 * 1000 /* 60s */);
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this.timer_ = null;
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this.working = false;
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this.polling = false;
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var that = this;
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scope.$on('$destroy', function() {
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that.stop();
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});
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};
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_PollChannel.prototype.stop = function() {
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if (this.timer_) {
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$timeout.cancel(this.timer_);
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this.timer_ = null;
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this.polling_ = false;
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}
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this.working = false;
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};
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_PollChannel.prototype.start = function() {
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// Make sure we invoke call outside the normal digest cycle, since
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// we'll call $scope.$apply ourselves.
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var that = this;
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setTimeout(function() { that.call_(); }, 0);
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};
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_PollChannel.prototype.call_ = function() {
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if (this.working) { return; }
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var that = this;
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this.working = true;
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this.scope_.$apply(function() {
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that.requester_(function(status) {
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if (status) {
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that.working = false;
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that.setupTimer_();
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} else {
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that.stop();
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}
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});
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});
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};
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_PollChannel.prototype.setupTimer_ = function() {
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if (this.timer_) { return; }
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var that = this;
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this.polling = true;
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this.timer_ = $timeout(function() {
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that.timer_ = null;
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that.call_();
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}, this.sleeptime_)
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};
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var service = {
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'create': function(scope, requester, opt_sleeptime) {
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return new _PollChannel(scope, requester, opt_sleeptime);
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}
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};
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return service;
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}]); |