webui-aria2/js/services/rpc/rpc.js

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angular
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.module('webui.services.rpc', [
'webui.services.rpc.syscall', 'webui.services.constants', 'webui.services.alerts',
'webui.services.utils'
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])
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.factory('$rpc', [
'$syscall', '$globalTimeout', '$alerts', '$utils',
'$rootScope', '$location',
function(syscall, time, alerts, utils, rootScope, uri) {
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var subscriptions = []
, configurations = [{ host: 'localhost', port: 6800, encrypt: false }]
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, currentConf = {}
, timeout = null
, forceNextUpdate = false;
if (['http', 'https'].indexOf(uri.protocol()) != -1) {
console.log(uri.host());
configurations.unshift({
host: uri.host(),
port: 6800,
encrypt: false
});
console.log(configurations);
}
var cookieConf = utils.getCookie('aria2conf');
// try at the end, so that it is not overwridden in case it doesnt work
if (cookieConf) configurations.push(cookieConf);
// update is implemented such that
// only one syscall at max is ongoing
// (i.e. serially) so should be private
// to maintain that invariant
var update = function() {
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clearTimeout(timeout);
timeout = null;
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subscriptions = _.filter(subscriptions, function(e) {
return !!e && e.once !== 2;
});
var subs = subscriptions.slice();
if (!subs.length) {
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timeout = setTimeout(update, time);
return;
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}
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if (configurations.length) {
currentConf = configurations.shift();
syscall.init(currentConf);
}
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var params = _.map(subs, function(s) {
return {
methodName: s.name,
params: s.params && s.params.length ? s.params : undefined
};
});
syscall.invoke({
name: 'system.multicall',
params: [params],
success: function(data) {
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if (configurations.length) {
// configuration worked, save it in cookie for next time and
// delete the pipelined configurations!!
alerts.log('success alas!! saving current configuration');
configurations = [];
}
utils.setCookie('aria2conf', currentConf);
var cbs = [];
_.each(data.result, function(d, i) {
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var handle = subs[i];
if (handle) {
if (d.code) {
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console.error(handle, d);
alerts.addAlert(d.message, 'error');
}
// run them later as the cb itself can mutate the subscriptions
cbs.push({cb: handle.cb, data: d});
if (handle.once) {
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handle.once = 2;
}
}
});
_.each(cbs, function(hnd) {
hnd.cb(hnd.data);
});
rootScope.$digest();
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if (forceNextUpdate) {
forceNextUpdate = false;
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timeout = setTimeout(update, 0);
}
else {
timeout = setTimeout(update, time);
}
},
error: function() {
// If some proposed configurations are still in the pipeline then retry
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if (configurations.length) {
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alerts.log('trying another configuration, last one didnt connect');
timeout = setTimeout(update, 0);
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}
else {
alerts.addAlert('<strong>Oh Snap!</strong> Could not connect to the aria2 server, retrying after ' + time / 1000 + ' secs. You might want to recheck the connection settings for your aria2 server by going to settings > connection settings', 'error');
timeout = setTimeout(update, time);
}
}
});
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};
// initiate the update loop
timeout = setTimeout(update, time);
return {
// conf can be configuration or array of configurations,
// each one will be tried one after the other till success,
// for all options for one conf read rpc/syscall.js
configure: function(conf) {
alerts.addAlert('Successfully changed aria2 connection configuration', 'success');
if (conf instanceof Array)
configurations = conf;
else
configurations = [conf];
},
// get current configuration being used
getConfiguration: function() { return currentConf },
// syscall is done only once, delay is optional
// and pass true to only dispatch it in the global timeout
// which can be used to batch up once calls
once: function(name, params, cb, delay) {
cb = cb || angular.noop;
params = params || [];
subscriptions.unshift({
once: true,
name: 'aria2.' + name,
params: params,
cb: cb
});
if (!delay) {
this.forceUpdate();
}
},
// callback is called each time with updated syscall data
// after the global timeout, delay is optional and pass it
// true to dispatch the first syscall also on global timeout
// which can be used to batch the subscribe calls
subscribe: function(name, params, cb, delay) {
cb = cb || angular.noop;
params = params || [];
var handle = {
once: false,
name: 'aria2.' + name,
params: params,
cb: cb
};
subscriptions.push(handle);
if (!delay) this.forceUpdate();
return handle;
},
// remove the subscribed callback by passing
// the returned handle bysubscribe
unsubscribe: function(handle) {
var ind = subscriptions.indexOf(handle);
subscriptions[ind] = null;
},
// force the global syscall update
forceUpdate: function() {
if (timeout) {
clearTimeout(timeout);
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timeout = setTimeout(update, 0);
}
else {
// a batch call is already in progress,
// wait till it returns and force the next one
forceNextUpdate = true;
}
}
};
}]);