update WTVBGMusic class/system

- rename getCategoryList to getCategorySongList
- add proper getCategoryList which filters client usable categories
- do not show empty categories to classic clients

zefie_wtvp_minisrv/ServiceVault/wtv-setup/choose-bg-songs.js

@@ -68,22 +68,27 @@ Choose a style name to see the songs for that style.
 <input type="hidden" autosubmit="onLeave">
 `;
 var catsListed = 0;
-var numCats = wtvbgm.categories.length;
+var categories = wtvbgm.getCategoryList();
+var numCats = categories.length;
 var divide = Math.round(numCats / 2, 0);
-Object.keys(wtvbgm.categories).forEach(function (k) {
-	if (catsListed == divide) {
-		data += `</td ><td width="20">
-</td><td width="198" valign="top" align="left">`;
-	}
+
+Object.keys(categories).forEach(function (k) {
 	var pubcat = parseInt(k) + 1;
-	data += `<table>
+	var songsInCat = wtvbgm.getCategorySongList(pubcat);
+	if (songsInCat.length > 0) {
+		if (catsListed == divide) {
+			data += `</td ><td width="20">
+</td><td width="198" valign="top" align="left">`;
+		}
+		data += `<table>
 <tbody><tr>
 <td valign="top">
 <input type="checkbox" name="enableCategory" value=${pubcat}${(wtvbgm.isCategoryEnabled(pubcat)) ? ' checked="checked"' : ''}>
 </td><td valign="bottom">
-<a href="wtv-setup:/set-bg?category=${pubcat}">${wtvbgm.categories[k]}</a><br>
+<a href="wtv-setup:/set-bg?category=${pubcat}">${categories[k]}</a><br>
 </td></tr></tbody></table>`;
-	catsListed++;
+		catsListed++;
+	}
 });
 
 data += `

zefie_wtvp_minisrv/ServiceVault/wtv-setup/set-bg.js

@@ -3,7 +3,7 @@ var minisrv_service_file = true;
 var WTVBGMusic = require("./WTVBGMusic.js");
 var wtvbgm = new WTVBGMusic(minisrv_config, ssid_sessions[socket.ssid]);
 if (request_headers.query.category) {
-	var musicList = wtvbgm.getCategoryList(request_headers.query.category);
+	var musicList = wtvbgm.getCategorySongList(request_headers.query.category);
 	var categoryName = wtvbgm.getCategoryName(request_headers.query.category);
 
 	headers = `200 OK

zefie_wtvp_minisrv/WTVBGMusic.js

@@ -1077,7 +1077,8 @@ class WTVBGMusic {
         return null;
     }
 
-    getCategoryList(category) {
+
+    getCategorySongList(category) {
         if (this.session_data.hasCap("client-can-do-rmf")) {
             // use rmf list
             var musiclist = this.musiclist_rmf;
@@ -1099,6 +1100,17 @@ class WTVBGMusic {
         return songList.filter(value => Object.keys(value).length !== 0);
     }
 
+    getCategoryList() {
+        var categories = [];
+        var self = this;
+        Object.keys(self.categories).forEach(function (k) {
+            var songList = self.getCategorySongList(parseInt(k) + 1);
+            if (songList.length > 0) categories[k] = self.categories[k];
+        });
+        return categories.filter(value => Object.keys(value).length !== 0);
+    }
+
+
     getCategoryName(category) {
         return this.categories[parseInt(category) - 1];
     }