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/* global DEBUG, DEBUG_WORKER */
/* global REQUEST_GET_CURRENT_CALLS */
/* global REQUEST_ANSWER, REQUEST_CONFERENCE, REQUEST_DIAL */
/* global REQUEST_DIAL_EMERGENCY_CALL, REQUEST_HANGUP */
/* global REQUEST_HANGUP_FOREGROUND_RESUME_BACKGROUND */
/* global REQUEST_HANGUP_WAITING_OR_BACKGROUND */
/* global REQUEST_SEPARATE_CONNECTION */
/* global REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE, REQUEST_UDUB */
"use strict";
(function(exports) {
const TELEPHONY_REQUESTS = [
REQUEST_GET_CURRENT_CALLS,
REQUEST_ANSWER,
REQUEST_CONFERENCE,
REQUEST_DIAL,
REQUEST_DIAL_EMERGENCY_CALL,
REQUEST_HANGUP,
REQUEST_HANGUP_FOREGROUND_RESUME_BACKGROUND,
REQUEST_HANGUP_WAITING_OR_BACKGROUND,
REQUEST_SEPARATE_CONNECTION,
REQUEST_SWITCH_WAITING_OR_HOLDING_AND_ACTIVE,
REQUEST_UDUB
];
// Set to true in ril_consts.js to see debug messages
let DEBUG = DEBUG_WORKER;
/**
* Queue entry; only used in the queue.
*/
let TelephonyRequestEntry = function(request, callback) {
this.request = request;
this.callback = callback;
};
let TelephonyRequestQueue = function(ril) {
this.ril = ril;
this.currentQueue = null; // Point to the current running queue.
this.queryQueue = [];
this.controlQueue = [];
};
TelephonyRequestQueue.prototype._getQueue = function(request) {
return (request === REQUEST_GET_CURRENT_CALLS) ? this.queryQueue
: this.controlQueue;
};
TelephonyRequestQueue.prototype._getAnotherQueue = function(queue) {
return (this.queryQueue === queue) ? this.controlQueue : this.queryQueue;
};
TelephonyRequestQueue.prototype._find = function(queue, request) {
for (let i = 0; i < queue.length; ++i) {
if (queue[i].request === request) {
return i;
}
}
return -1;
};
TelephonyRequestQueue.prototype._startQueue = function(queue) {
if (queue.length === 0) {
return;
}
// We only need to keep one entry for queryQueue.
if (queue === this.queryQueue) {
queue.splice(1, queue.length - 1);
}
this.currentQueue = queue;
for (let entry of queue) {
this._executeEntry(entry);
}
};
TelephonyRequestQueue.prototype._executeEntry = function(entry) {
if (DEBUG) {
this.debug("execute " + this._getRequestName(entry.request));
}
entry.callback();
};
TelephonyRequestQueue.prototype._getRequestName = function(request) {
let method = this.ril[request];
return (typeof method === 'function') ? method.name : "";
};
TelephonyRequestQueue.prototype.debug = function(msg) {
this.ril.context.debug("[TeleQ] " + msg);
};
TelephonyRequestQueue.prototype.isValidRequest = function(request) {
return TELEPHONY_REQUESTS.indexOf(request) !== -1;
};
TelephonyRequestQueue.prototype.push = function(request, callback) {
if (!this.isValidRequest(request)) {
if (DEBUG) {
this.debug("Error: " + this._getRequestName(request) +
" is not a telephony request");
}
return;
}
if (DEBUG) {
this.debug("push " + this._getRequestName(request));
}
let entry = new TelephonyRequestEntry(request, callback);
let queue = this._getQueue(request);
queue.push(entry);
// Try to run the request.
if (this.currentQueue === queue) {
this._executeEntry(entry);
} else if (!this.currentQueue) {
this._startQueue(queue);
}
};
TelephonyRequestQueue.prototype.pop = function(request) {
if (!this.isValidRequest(request)) {
if (DEBUG) {
this.debug("Error: " + this._getRequestName(request) +
" is not a telephony request");
}
return;
}
if (DEBUG) {
this.debug("pop " + this._getRequestName(request));
}
let queue = this._getQueue(request);
let index = this._find(queue, request);
if (index === -1) {
throw new Error("Cannot find the request in telephonyRequestQueue.");
} else {
queue.splice(index, 1);
}
if (queue.length === 0) {
this.currentQueue = null;
this._startQueue(this._getAnotherQueue(queue));
}
};
// Before we make sure to form it as a module would not add extra
// overhead of module loading, we need to define it in this way
// rather than 'module.exports' it as a module component.
exports.TelephonyRequestQueue = TelephonyRequestQueue;
})(self); // in worker self is the global
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