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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | 1x 1x 66x 61x 66x 147x 147x 46x 46x 1x 45x 5x 3x 3x 3x 3x 19x 3x 2x 8x 8x 1x 7x 8x 12x 28x 28x 8x 20x 61x 61x 61x 146x 146x 50x 146x 61x | const DECIMAL_RESOLUTION_REGEX = /^(\d+)x(\d+)$/; // eslint-disable-line no-useless-escape
const ATTR_LIST_REGEX = /\s*(.+?)\s*=((?:\".*?\")|.*?)(?:,|$)/g; // eslint-disable-line no-useless-escape
// adapted from https://github.com/kanongil/node-m3u8parse/blob/master/attrlist.js
class AttrList {
constructor (attrs) {
if (typeof attrs === 'string')
attrs = AttrList.parseAttrList(attrs);
for (let attr in attrs) {
Eif (attrs.hasOwnProperty(attr))
this[attr] = attrs[attr];
}
}
decimalInteger (attrName) {
const intValue = parseInt(this[attrName], 10);
if (intValue > Number.MAX_SAFE_INTEGER)
return Infinity;
return intValue;
}
hexadecimalInteger (attrName) {
if (this[attrName]) {
let stringValue = (this[attrName] || '0x').slice(2);
stringValue = ((stringValue.length & 1) ? '0' : '') + stringValue;
const value = new Uint8Array(stringValue.length / 2);
for (let i = 0; i < stringValue.length / 2; i++)
value[i] = parseInt(stringValue.slice(i * 2, i * 2 + 2), 16);
return value;
} else {
return null;
}
}
hexadecimalIntegerAsNumber (attrName) {
const intValue = parseInt(this[attrName], 16);
if (intValue > Number.MAX_SAFE_INTEGER)
return Infinity;
return intValue;
}
decimalFloatingPoint (attrName) {
return parseFloat(this[attrName]);
}
enumeratedString (attrName) {
return this[attrName];
}
decimalResolution (attrName) {
const res = DECIMAL_RESOLUTION_REGEX.exec(this[attrName]);
if (res === null)
return undefined;
return {
width: parseInt(res[1], 10),
height: parseInt(res[2], 10)
};
}
static parseAttrList (input) {
let match, attrs = {};
ATTR_LIST_REGEX.lastIndex = 0;
while ((match = ATTR_LIST_REGEX.exec(input)) !== null) {
let value = match[2], quote = '"';
if (value.indexOf(quote) === 0 &&
value.lastIndexOf(quote) === (value.length - 1))
value = value.slice(1, -1);
attrs[match[1]] = value;
}
return attrs;
}
}
export default AttrList;
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