Tidied up 'Split Colour Channels' operation and added 'Multimedia' category

CHANGELOG.md

@@ -2,6 +2,9 @@
 All major and minor version changes will be documented in this file. Details of patch-level version changes can be found in [commit messages](https://github.com/gchq/CyberChef/commits/master).
 
 
+### [8.18.0] - 2018-12-26
+- 'Split Colour Channels' operation added [@artemisbot] | [#449]
+
 ### [8.17.0] - 2018-12-25
 - 'Generate QR Code' and 'Parse QR Code' operations added [@j433866] | [#448]
 
@@ -82,6 +85,7 @@ All major and minor version changes will be documented in this file. Details of
 
 
 
+[8.18.0]: https://github.com/gchq/CyberChef/releases/tag/v8.18.0
 [8.17.0]: https://github.com/gchq/CyberChef/releases/tag/v8.17.0
 [8.16.0]: https://github.com/gchq/CyberChef/releases/tag/v8.16.0
 [8.15.0]: https://github.com/gchq/CyberChef/releases/tag/v8.15.0
@@ -150,3 +154,4 @@ All major and minor version changes will be documented in this file. Details of
 [#443]: https://github.com/gchq/CyberChef/pull/443
 [#446]: https://github.com/gchq/CyberChef/pull/446
 [#448]: https://github.com/gchq/CyberChef/pull/448
+[#449]: https://github.com/gchq/CyberChef/pull/449

src/core/config/Categories.json

@@ -347,9 +347,17 @@
             "Detect File Type",
             "Scan for Embedded Files",
             "Remove EXIF",
-            "Extract EXIF",
+            "Extract EXIF"
+        ]
+    },
+    {
+        "name": "Multimedia",
+        "ops": [
             "Render Image",
-            "Play Media"
+            "Play Media",
+            "Remove EXIF",
+            "Extract EXIF",
+            "Split Colour Channels"
         ]
     },
     {
@@ -366,10 +374,6 @@
             "Generate QR Code",
             "Parse QR Code",
             "Haversine distance",
-            "Render Image",
-            "Remove EXIF",
-            "Extract EXIF",
-            "Split Colour Channels",
             "Numberwang",
             "XKCD Random Number"
         ]

src/core/operations/SplitColourChannels.mjs

@@ -24,25 +24,12 @@ class SplitColourChannels extends Operation {
 
         this.name = "Split Colour Channels";
         this.module = "Image";
-        this.description = "Splits given image into its red, green and blue colour channels.";
-        this.infoURL = "https://en.wikipedia.org/wiki/Channel_(digital_image)";
+        this.description = "Splits the given image into its red, green and blue colour channels.";
+        this.infoURL = "https://wikipedia.org/wiki/Channel_(digital_image)";
         this.inputType = "byteArray";
         this.outputType = "List<File>";
         this.presentType = "html";
-        this.args = [
-            /* Example arguments. See the project wiki for full details.
-            {
-                name: "First arg",
-                type: "string",
-                value: "Don't Panic"
-            },
-            {
-                name: "Second arg",
-                type: "number",
-                value: 42
-            }
-            */
-        ];
+        this.args = [];
     }
 
     /**
@@ -55,18 +42,22 @@ class SplitColourChannels extends Operation {
         // Make sure that the input is an image
         if (type && type.mime.indexOf("image") === 0) {
             const parsedImage = await jimp.read(Buffer.from(input));
+
             const red = new Promise(async (resolve, reject) => {
                 try {
-                    const split = parsedImage.clone()
+                    const split = parsedImage
+                        .clone()
                         .color([
                             {apply: "blue", params: [-255]},
                             {apply: "green", params: [-255]}
-                        ]).getBufferAsync(jimp.MIME_PNG);
+                        ])
+                        .getBufferAsync(jimp.MIME_PNG);
                     resolve(new File([new Uint8Array((await split).values())], "red.png", {type: "image/png"}));
                 } catch (err) {
                     reject(new OperationError(`Could not split red channel: ${err}`));
                 }
             });
+
             const green = new Promise(async (resolve, reject) => {
                 try {
                     const split = parsedImage.clone()
@@ -79,6 +70,7 @@ class SplitColourChannels extends Operation {
                     reject(new OperationError(`Could not split green channel: ${err}`));
                 }
             });
+
             const blue = new Promise(async (resolve, reject) => {
                 try {
                     const split = parsedImage
@@ -91,6 +83,7 @@ class SplitColourChannels extends Operation {
                     reject(new OperationError(`Could not split blue channel: ${err}`));
                 }
             });
+
             return await Promise.all([red, green, blue]);
         } else {
             throw new OperationError("Invalid file type.");

test/index.mjs

@@ -74,7 +74,6 @@ import "./tests/operations/SeqUtils";
 import "./tests/operations/SetDifference";
 import "./tests/operations/SetIntersection";
 import "./tests/operations/SetUnion";
-//import "./tests/operations/SplitColourChannels";
 import "./tests/operations/StrUtils";
 import "./tests/operations/SymmetricDifference";
 import "./tests/operations/TextEncodingBruteForce";
@@ -84,6 +83,9 @@ import "./tests/operations/Magic";
 import "./tests/operations/ParseTLV";
 import "./tests/operations/Media";
 
+// Cannot test operations that use the File type yet
+//import "./tests/operations/SplitColourChannels";
+
 let allTestsPassing = true;
 const testStatusCounts = {
     total: 0,