ESM: Ported Bzip2, Diff and Tar operations

2025-04-20 14:56:19 -04:00 · 2018-05-21 18:23:05 +00:00 · 2018-05-21 18:23:05 +00:00 · cefe3fc542
commit cefe3fc542
parent 749b0510e7
6 changed files with 459 additions and 2 deletions
--- a/src/core/operations/Diff.mjs
+++ b/src/core/operations/Diff.mjs
@ -0,0 +1,124 @@
+/**
+ * @author n1474335 [n1474335@gmail.com]
+ * @copyright Crown Copyright 2016
+ * @license Apache-2.0
+ */
+
+import Operation from "../Operation";
+import Utils from "../Utils";
+import * as JsDiff from "diff";
+import OperationError from "../errors/OperationError";
+
+/**
+ * Diff operation
+ */
+class Diff extends Operation {
+
+    /**
+     * Diff constructor
+     */
+    constructor() {
+        super();
+
+        this.name = "Diff";
+        this.module = "Diff";
+        this.description = "Compares two inputs (separated by the specified delimiter) and highlights the differences between them.";
+        this.inputType = "string";
+        this.outputType = "html";
+        this.args = [
+            {
+                "name": "Sample delimiter",
+                "type": "binaryString",
+                "value": "\\n\\n"
+            },
+            {
+                "name": "Diff by",
+                "type": "option",
+                "value": ["Character", "Word", "Line", "Sentence", "CSS", "JSON"]
+            },
+            {
+                "name": "Show added",
+                "type": "boolean",
+                "value": true
+            },
+            {
+                "name": "Show removed",
+                "type": "boolean",
+                "value": true
+            },
+            {
+                "name": "Ignore whitespace (relevant for word and line)",
+                "type": "boolean",
+                "value": false
+            }
+        ];
+    }
+
+    /**
+     * @param {string} input
+     * @param {Object[]} args
+     * @returns {html}
+     */
+    run(input, args) {
+        const [
+                sampleDelim,
+                diffBy,
+                showAdded,
+                showRemoved,
+                ignoreWhitespace
+            ] = args,
+            samples = input.split(sampleDelim);
+        let output = "",
+            diff;
+
+        if (!samples || samples.length !== 2) {
+            throw new OperationError("Incorrect number of samples, perhaps you need to modify the sample delimiter or add more samples?");
+        }
+
+        switch (diffBy) {
+            case "Character":
+                diff = JsDiff.diffChars(samples[0], samples[1]);
+                break;
+            case "Word":
+                if (ignoreWhitespace) {
+                    diff = JsDiff.diffWords(samples[0], samples[1]);
+                } else {
+                    diff = JsDiff.diffWordsWithSpace(samples[0], samples[1]);
+                }
+                break;
+            case "Line":
+                if (ignoreWhitespace) {
+                    diff = JsDiff.diffTrimmedLines(samples[0], samples[1]);
+                } else {
+                    diff = JsDiff.diffLines(samples[0], samples[1]);
+                }
+                break;
+            case "Sentence":
+                diff = JsDiff.diffSentences(samples[0], samples[1]);
+                break;
+            case "CSS":
+                diff = JsDiff.diffCss(samples[0], samples[1]);
+                break;
+            case "JSON":
+                diff = JsDiff.diffJson(samples[0], samples[1]);
+                break;
+            default:
+                throw new OperationError("Invalid 'Diff by' option.");
+        }
+
+        for (let i = 0; i < diff.length; i++) {
+            if (diff[i].added) {
+                if (showAdded) output += "<span class='hl5'>" + Utils.escapeHtml(diff[i].value) + "</span>";
+            } else if (diff[i].removed) {
+                if (showRemoved) output += "<span class='hl3'>" + Utils.escapeHtml(diff[i].value) + "</span>";
+            } else {
+                output += Utils.escapeHtml(diff[i].value);
+            }
+        }
+
+        return output;
+    }
+
+}
+
+export default Diff;