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Merged esm branch into feature-magic. Ported FileType ops.

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n1474335 2018-05-20 16:49:42 +01:00
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src/core/operations/FromBase64.mjs Normal file
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/**
* @author n1474335 [n1474335@gmail.com]
* @copyright Crown Copyright 2016
* @license Apache-2.0
*/
import Operation from "../Operation";
import {fromBase64, ALPHABET_OPTIONS} from "../lib/Base64";
/**
* From Base64 operation
*/
class FromBase64 extends Operation {
/**
* FromBase64 constructor
*/
constructor() {
super();
this.name = "From Base64";
this.module = "Default";
this.description = "Base64 is a notation for encoding arbitrary byte data using a restricted set of symbols that can be conveniently used by humans and processed by computers.<br><br>This operation decodes data from an ASCII Base64 string back into its raw format.<br><br>e.g. <code>aGVsbG8=</code> becomes <code>hello</code>";
this.inputType = "string";
this.outputType = "byteArray";
this.args = [
{
name: "Alphabet",
type: "editableOption",
value: ALPHABET_OPTIONS
},
{
name: "Remove non-alphabet chars",
type: "boolean",
value: true
}
];
this.patterns = [
{
match: "^(?:[A-Z\\d+/]{4})+(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?$",
flags: "i",
args: ["A-Za-z0-9+/=", false]
},
{
match: "^[A-Z\\d\\-_]{20,}$",
flags: "i",
args: ["A-Za-z0-9-_", false]
},
{
match: "^(?:[A-Z\\d+\\-]{4}){5,}(?:[A-Z\\d+\\-]{2}==|[A-Z\\d+\\-]{3}=)?$",
flags: "i",
args: ["A-Za-z0-9+\\-=", false]
},
{
match: "^(?:[A-Z\\d./]{4}){5,}(?:[A-Z\\d./]{2}==|[A-Z\\d./]{3}=)?$",
flags: "i",
args: ["./0-9A-Za-z=", false]
},
{
match: "^[A-Z\\d_.]{20,}$",
flags: "i",
args: ["A-Za-z0-9_.", false]
},
{
match: "^(?:[A-Z\\d._]{4}){5,}(?:[A-Z\\d._]{2}--|[A-Z\\d._]{3}-)?$",
flags: "i",
args: ["A-Za-z0-9._-", false]
},
{
match: "^(?:[A-Z\\d+/]{4}){5,}(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?$",
flags: "i",
args: ["0-9a-zA-Z+/=", false]
},
{
match: "^(?:[A-Z\\d+/]{4}){5,}(?:[A-Z\\d+/]{2}==|[A-Z\\d+/]{3}=)?$",
flags: "i",
args: ["0-9A-Za-z+/=", false]
},
{
match: "^[ !\"#$%&'()*+,\\-./\\d:;<=>?@A-Z[\\\\\\]^_]{20,}$",
flags: "",
args: [" -_", false]
},
{
match: "^[A-Z\\d+\\-]{20,}$",
flags: "i",
args: ["+\\-0-9A-Za-z", false]
},
{
match: "^[!\"#$%&'()*+,\\-0-689@A-NP-VX-Z[`a-fh-mp-r]{20,}$",
flags: "",
args: ["!-,-0-689@A-NP-VX-Z[`a-fh-mp-r", false]
},
{
match: "^(?:[N-ZA-M\\d+/]{4}){5,}(?:[N-ZA-M\\d+/]{2}==|[N-ZA-M\\d+/]{3}=)?$",
flags: "i",
args: ["N-ZA-Mn-za-m0-9+/=", false]
},
{
match: "^[A-Z\\d./]{20,}$",
flags: "i",
args: ["./0-9A-Za-z", false]
},
];
}
/**
* @param {ArrayBuffer} input
* @param {Object[]} args
* @returns {string}
*/
run(input, args) {
const [alphabet, removeNonAlphChars] = args;
return fromBase64(input, alphabet, "byteArray", removeNonAlphChars);
}
/**
* Highlight to Base64
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlight(pos, args) {
pos[0].start = Math.ceil(pos[0].start / 4 * 3);
pos[0].end = Math.floor(pos[0].end / 4 * 3);
return pos;
}
/**
* Highlight from Base64
*
* @param {Object[]} pos
* @param {number} pos[].start
* @param {number} pos[].end
* @param {Object[]} args
* @returns {Object[]} pos
*/
highlightReverse(pos, args) {
pos[0].start = Math.floor(pos[0].start / 3 * 4);
pos[0].end = Math.ceil(pos[0].end / 3 * 4);
return pos;
}
}
export default FromBase64;