Add check for correct icon format

src/helpers/helpers.js

@@ -1,5 +1,7 @@
 import os from 'os';
 import axios from 'axios';
+import hasBinary from 'hasbin';
+import path from 'path';
 
 function isOSX() {
     return os.platform() === 'darwin';
@@ -15,12 +17,87 @@ function downloadFile(fileUrl) {
             responseType: 'arraybuffer'
         })
         .then(function(response) {
-            return response.data;
+            if (!response.data) {
+                return null;
+            }
+            return {
+                data: response.data,
+                ext: path.extname(fileUrl)
+            };
         });
 }
 
+function allowedIconFormats(platform) {
+    const hasIdentify = hasBinary.sync('identify');
+    const hasConvert = hasBinary.sync('convert');
+    const hasIconUtil = hasBinary.sync('iconutil');
+
+    const pngToIcns = hasConvert && hasIconUtil;
+    const pngToIco = hasConvert;
+    const icoToIcns = pngToIcns && hasIdentify;
+    const icoToPng = hasConvert;
+
+    // todo scripts for the following
+    const icnsToPng = false;
+    const icnsToIco = false;
+
+    const formats = [];
+
+    // todo shell scripting is not supported on windows, temporary override
+    if (isWindows()) {
+        switch (platform) {
+            case 'darwin':
+                formats.push('.icns');
+                break;
+            case 'linux':
+                formats.push('.png');
+                break;
+            case 'win32':
+                formats.push('ico');
+                break;
+            default:
+                throw `function allowedIconFormats error: Unknown platform ${platform}`;
+        }
+        return formats;
+    }
+
+    switch (platform) {
+        case 'darwin':
+            formats.push('.icns');
+            if (pngToIcns) {
+                formats.push('.png');
+            }
+            if (icoToIcns) {
+                formats.push('.ico');
+            }
+            break;
+        case 'linux':
+            formats.push('.png');
+            if (icoToPng) {
+                formats.push('.ico');
+            }
+            if (icnsToPng) {
+                formats.push('icns');
+            }
+            break;
+        case 'win32':
+            formats.push('.ico');
+            if (pngToIco) {
+                formats.push('.png');
+            }
+            if (icnsToIco) {
+                formats.push('icns');
+            }
+            break;
+        default:
+            throw `function allowedIconFormats error: Unknown platform ${platform}`;
+    }
+    return formats;
+}
+
 export default {
     isOSX,
     isWindows,
-    downloadFile
+    downloadFile,
+    allowedIconFormats
 };

src/infer/inferIcon.js

@@ -3,27 +3,38 @@ import path from 'path';
 import fs from 'fs';
 import tmp from 'tmp';
 import gitCloud from 'gitcloud';
+import helpers from './../helpers/helpers';
+
+const {downloadFile, allowedIconFormats} = helpers;
 tmp.setGracefulCleanup();
 
-import helpers from './../helpers/helpers';
-const {downloadFile} = helpers;
-
 function inferIconFromStore(targetUrl, platform) {
-    if (platform === 'win32') {
-        return new Promise((resolve, reject) => reject('Skipping icon retrieval from store on windows'));
-    }
+    const allowedFormats = allowedIconFormats(platform);
 
     return gitCloud('http://jiahaog.com/nativefier-icons/')
         .then(fileIndex => {
-            const matchingUrls = fileIndex
+            const matchingIcons = fileIndex
                 .filter(item => {
+                    // todo might have problems with matching length, e.g. `book` vs `facebook`
                     return targetUrl
                         .toLowerCase()
                         .includes(item.name);
                 })
-                .map(item => item.url);
+                .map(item => {
+                    item.ext = path.extname(item.url);
+                    return item;
+                });
+
+            let matchingUrl;
+            for (let format of allowedFormats) {
+                for (let icon of matchingIcons) {
+                    if (icon.ext !== format) {
+                        continue;
+                    }
+                    matchingUrl = icon.url;
+                }
+            }
 
-            const matchingUrl = matchingUrls[0];
             if (!matchingUrl) {
                 return null;
             }
@@ -49,11 +60,14 @@ function inferFromPage(targetUrl, platform, outDir) {
         preferredExt = 'ico';
     }
 
+    // todo might want to pass list of preferences instead
     return pageIcon(targetUrl, {ext: preferredExt})
         .then(icon => {
             if (!icon) {
-                throw 'Icon not found';
+                return null;
             }
+
+            // note that ext from page icon does not contain a '.'
             const outfilePath = path.join(outDir, `/icon.${icon.ext}`);
             return writeFilePromise(outfilePath, icon.data);
         });
@@ -67,18 +81,13 @@ function inferFromPage(targetUrl, platform, outDir) {
 function inferIconFromUrlToPath(targetUrl, platform, outDir) {
 
     return inferIconFromStore(targetUrl, platform)
-        .then(iconData => {
-
-            if (!iconData) {
-                throw 'Unable to find icon from store';
+        .then(icon => {
+            if (!icon) {
+                return inferFromPage(targetUrl, platform, outDir);
             }
 
-            const outfilePath = path.join(outDir, `/icon.png`);
-            return writeFilePromise(outfilePath, iconData);
-        }).catch(error => {
-            console.warn('Unable to find icon on store', error);
-            console.warn('Falling back to inferring from url');
-            return inferFromPage(targetUrl, platform, outDir);
+            const outfilePath = path.join(outDir, `/icon${icon.ext}`);
+            return writeFilePromise(outfilePath, icon.data);
         });
 }