webui-aria2/js/services/utils.js

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angular.module('webui.services.utils', ['webui.services.constants'])
.factory('$utils', ['$filter', "$name", function(filter, $name) {
var rnd16 = (function() {
"use strict";
var rndBuffer = new Uint8Array(16);
var rnd16Weak = function() {
for (var i = 0, r; i < 16; i++) {
if (!(i % 0x3)) r = Math.random() * 0x100000000 | 0;
rndBuffer[i] = r >>> ((i & 0x3) << 0x3) & 0xff;
}
return rndBuffer;
};
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if (!window.crypto || !crypto.getRandomValues) {
return rnd16Weak;
}
return function() {
try {
crypto.getRandomValues(rndBuffer);
return rndBuffer;
}
catch (ex) {
// Entropy might be exhausted
return rnd16Weak();
}
};
})();
var utils = {
fmtsize: function(len) {
len = +len; // coerce to number
if (len <= 1024) {
return len.toFixed(0) + " B";
}
len /= 1024;
if (len <= 1024) {
return len.toFixed(1) + " KB"
}
len /= 1024;
if (len <= 1024) {
return len.toFixed(2) + " MB";
}
len /= 1024;
return len.toFixed(3) + " GB";
},
fmtspeed: function(speed) {
return utils.fmtsize(speed) + "/s";
},
// saves the key value pair in cookies
setCookie: function(key, value) {
var exdate = new Date();
exdate.setDate(exdate.getDate() + 30 * 12);
var cvalue = escape(JSON.stringify(value)) + "; expires=" + exdate.toUTCString();
document.cookie = key + "=" + cvalue;
},
// gets a value for a key stored in cookies
getCookie: function(key) {
var chunks = document.cookie.split(";");
for (var i = 0; i < chunks.length; i++) {
var ckey = chunks[i].substr(0, chunks[i].indexOf("=")).replace(/^\s+|\s+$/g,"");
var cvalue = chunks[i].substr(chunks[i].indexOf("=") + 1);
if (key == ckey) {
return JSON.parse(unescape(cvalue));
}
}
return null;
},
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getFileName: function(path) {
var seed = path.split(/[/\\]/);
return seed[seed.length - 1];
},
uuid: (function() {
var bt = [];
for (var i = 0; i < 0x100; ++i) {
bt.push((i + 0x100).toString(16).substr(1));
}
Object.freeze(bt);
return function() {
var r = rnd16();
r[6] = (r[6] & 0xf) | 0x40; // Version 4
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r[8] = (r[8] & 0x3f) | 0x80; // Version 4y
return bt[r[0]] + bt[r[1]] + bt[r[2]] + bt[r[3]] + "-" +
bt[r[4]] + bt[r[5]] + "-" +
bt[r[6]] + bt[r[7]] + "-" +
bt[r[8]] + bt[r[9]] + "-" +
bt[r[10]] + bt[r[11]] + bt[r[12]] + bt[r[13]] + bt[r[14]] + bt[r[15]];
};
})(),
randStr: function() {
return utils.uuid();
},
// maps the array in place to the destination
// arr, dest (optional): array
// func: a merge mapping func, see ctrls/download.js
mergeMap: function(arr, dest, func) {
if (!dest) {
dest = [];
}
for (var i = 0, e = Math.min(arr.length, dest.length); i < e; ++i) {
func(arr[i], dest[i]);
}
// Insert newly created downloads
while (i < arr.length) {
dest.push(func(arr[i++]));
}
// Truncate if necessary.
dest.length = arr.length;
return dest;
},
// get info title from global statistics
getTitle: function(stats) {
var title =
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'active: ' + stats.numActive
+ ' - waiting: ' + stats.numWaiting
+ ' - stopped: ' + stats.numStopped
+ ' — '
+ $name;
return title;
},
// get download chunks from aria2 bitfield
getChunksFromHex: function(bitfield, numOfPieces) {
var chunks = [], len = 0, numPieces = parseInt(numOfPieces);
if (!bitfield) return [];
var totalDownloaded = 0;
if (numPieces > 1) {
var chunk_ratio = 1 / numPieces;
var piecesProcessed = 0;
for (var i = 0; i < bitfield.length; i++) {
var hex = parseInt(bitfield[i], 16);
for (var j = 1; j <= 4; j++) {
var bit = hex & (1 << (4 - j));
if (bit) totalDownloaded++;
var prog = !!bit;
if (len >= 1 && chunks[len - 1].show == prog) {
chunks[len - 1].ratio += chunk_ratio;
}
else {
chunks.push({
ratio: chunk_ratio,
show: prog
});
len++;
}
piecesProcessed++;
if (piecesProcessed == numPieces)
return chunks;
}
}
}
return chunks;
}
};
return utils;
}]);