Improve example JavaScript example and README section

README.md

@@ -349,14 +349,16 @@ Here are some Bash examples which illustrate getting and setting tag information
   tageditor set --pedantic debug --java-script path/to/script.js -f foo.mp3
   ```
 
-    - This feature is still experimental. The script API is still very limited and subject to change.
+    - This feature is still experimental. The script API is still subject to change.
     - The script needs to be ECMAScript as supported by the Qt framework.
     - This feature requires the tag editor to be configured with Qt QML as JavaScript provider at
       compile time. Checkout the build instructions under "Building with Qt GUI" for details.
-    - It needs to export a `main()` function. This function gets executed for every file and passed
-      and object representing this file as first argument.
-    - The option `--pedantic debug` is not required but useful for debugging.
-    - Checkout the file `testfiles/set-tags.js` directory in this repository for a basic example.
+    - The script needs to export a `main()` function. This function gets executed for every file and
+      passed an object representing this file as first argument.
+    - Checkout the file `testfiles/set-tags.js` directory in this repository for an example that
+      applies basic fixes and tries to fetch lyrics and cover art.
+    - The option `--pedantic debug` is not required but useful for debugging. You may also add
+      `--script-settings dryRun=1` and use that setting within the script as shown in the example.
     - Common tag fields are exposed as object properties as shown in the mentioned example.
         - Only properties for fields that are supported by the tag are added to the "fields" object.
         - Adding properties of unsupported fields manually does not work; those will just be ignored.
@@ -364,9 +366,9 @@ Here are some Bash examples which illustrate getting and setting tag information
           also assign an empty array to fields to delete them.
         - The content of binary fields is exposed as `ArrayBuffer`. Use must also use an `ArrayBuffer`
           to set the value of binary fields such as the cover.
-        - The content of other fields is mostly exposed as `String` or `Number`. Use must also use
-          these types to set the value of those fields. The string-representation of the assigned
-          content will then be converted automatically to what's needed internally.
+        - The content of other fields is mostly exposed as `String` or `Number`. You must also use
+          one of those types to set the value of those fields. The string-representation of the
+          assigned content will then be converted automatically to what's needed internally.
     - The `utility` object exposes useful methods, e.g. for logging and controlling the event loop.
     - Checkout the file `testfiles/http.js` in this repository for an example of using XHR and
       controlling the event loop.

testfiles/metadatasearch.js

@@ -4,19 +4,21 @@ const albumColumn = 1;
 
 export function queryLyrics(searchCriteria) {
     return cacheValue(lyricsCache, searchCriteria.title + "_" + searchCriteria.artist, () => {
+        utility.log(" - Querying lyrics for '" + searchCriteria.title + "' from '" + searchCriteria.artist + "' ...");
         return queryLyricsFromProviders(["Tekstowo", "MakeItPersonal"], searchCriteria)
     });
 }
 
 export function queryCover(searchCriteria) {
     return cacheValue(coverCache, searchCriteria.album + "_" + searchCriteria.artist, () => {
+        utility.log(" - Querying cover art for '" + searchCriteria.album + "' from '" + searchCriteria.artist + "' ...");
         return queryCoverFromProvider("MusicBrainz", searchCriteria);
     });
 }
 
 function cacheValue(cache, key, generator) {
     const cachedValue = cache[key];
-    return cachedValue ? cachedValue : cache[key] = generator();
+    return cachedValue ? cachedValue : (cache[key] = generator());
 }
 
 function waitFor(signal) {

testfiles/set-tags.js

@@ -13,7 +13,7 @@ export function main(file) {
     return !isTruthy(settings.dryRun);
 }
 
-const mainTextFields = ["title", "artist", "album"];
+const mainTextFields = ["title", "artist", "album", "genre"];
 const personalFields = ["comment", "rating"];
 
 function isString(value) {
@@ -105,6 +105,12 @@ function addMiscFields(file, tag) {
     if (!fields.disk.length) {
         fields.disk = "1/1";
     }
+    const dir = file.containingDirectory.toLowerCase();
+    if (dir.includes("bootleg")) {
+        fields.comment = "bootleg";
+    } else if (dir.includes("singles")) {
+        fields.comment = "single";
+    }
 }
 
 function changeTagFields(file, tag) {
@@ -114,5 +120,5 @@ function changeTagFields(file, tag) {
     addTotalNumberOfTracks(file, tag);
     addMiscFields(file, tag);
     addLyrics(file, tag);
-    addCover(file, tag);
+    //addCover(file, tag);
 }