Merge pull request 'Playlist Browser' (#228) from slord/tangara-fw:playlist-browser into main

Reviewed-on: https://codeberg.org/cool-tech-zone/tangara-fw/pulls/228

lua/file_browser.lua

@@ -8,11 +8,11 @@ local backstack = require("backstack")
 local font = require("font")
 local queue = require("queue")
 local playing = require("playing")
-local styles = require("styles")
 local playback = require("playback")
 local theme = require("theme")
 local screen = require("screen")
 local filesystem = require("filesystem")
+local playlist_iterator = require("playlist_iterator")
 
 return screen:new {
   create_ui = function(self)
@@ -70,8 +70,7 @@ return screen:new {
               breadcrumb = item:filepath()
             })
           elseif
-              item:filepath():match("%.playlist$") or
-              item:filepath():match("%.m3u8?$") then
+              playlist_iterator:is_playlist(item) then
             queue.open_playlist(item:filepath())
             playback.playing:set(true)
             backstack.push(playing:new())

lua/main_menu.lua

@@ -11,7 +11,6 @@ local browser = require("browser")
 local playing = require("playing")
 local styles = require("styles")
 local filesystem = require("filesystem")
-local screen = require("screen")
 local font = require("font")
 local theme = require("theme")
 local img = require("images")
@@ -129,6 +128,15 @@ return widgets.MenuScreen:new {
       })
     end
 
+    local playlist_btn = indexes_list:add_btn(nil, "Playlists")
+    playlist_btn:onClicked(function()
+      backstack.push(require("playlist_browser"):new {
+        title = "Playlists",
+        iterator = filesystem.iterator("/Playlists")
+      })
+    end)
+    playlist_btn:add_style(styles.list_item)
+
     local function show_no_indexes(msg)
       indexes_list:add_flag(lvgl.FLAG.HIDDEN)
       no_indexes_container:clear_flag(lvgl.FLAG.HIDDEN)
@@ -144,6 +152,14 @@ return widgets.MenuScreen:new {
       end
     end
 
+    local function hide_playlist_listing()
+      playlist_btn:add_flag(lvgl.FLAG.HIDDEN)
+    end
+
+    local function show_playlist_listing()
+      playlist_btn:clear_flag(lvgl.FLAG.HIDDEN)
+    end
+
     local function update_visible_indexes()
       local has_valid_index = false
       for _, idx in ipairs(indexes) do
@@ -157,6 +173,13 @@ return widgets.MenuScreen:new {
       end
       if has_valid_index then
         hide_no_indexes()
+
+        -- If we have valid indexes, then also check for playlists
+        if filesystem.iterator("/Playlists/"):next() == nil then
+          hide_playlist_listing()
+        else
+          show_playlist_listing()
+        end
       else
         if require("database").updating:get() then
           show_no_indexes("The database is updating for the first time. Please wait.")

lua/playlist_browser.lua

@@ -0,0 +1,94 @@
+-- SPDX-FileCopyrightText: 2025 Sam Lord <code@samlord.co.uk>
+--
+-- SPDX-License-Identifier: GPL-3.0-only
+
+local lvgl = require("lvgl")
+local widgets = require("widgets")
+local backstack = require("backstack")
+local playing = require("playing")
+local filesystem = require("filesystem")
+local screen = require("screen")
+local font = require("font")
+local theme = require("theme")
+local playback = require("playback")
+local queue = require("queue")
+local playlist_iterator = require("playlist_iterator")
+local img = require("images")
+
+
+return screen:new {
+  create_ui = function(self)
+    self.root = lvgl.Object(nil, {
+      flex = {
+        flex_direction = "column",
+        flex_wrap = "wrap",
+        justify_content = "flex-start",
+        align_items = "flex-start",
+        align_content = "flex-start"
+      },
+      w = lvgl.HOR_RES(),
+      h = lvgl.VER_RES()
+    })
+    self.root:center()
+
+    self.status_bar = widgets.StatusBar(self, {
+      back_cb = backstack.pop,
+      title = self.title
+    })
+
+    local header = self.root:Object {
+      flex = {
+        flex_direction = "column",
+        flex_wrap = "wrap",
+        justify_content = "flex-start",
+        align_items = "flex-start",
+        align_content = "flex-start"
+      },
+      w = lvgl.HOR_RES(),
+      h = lvgl.SIZE_CONTENT,
+      pad_left = 4,
+      pad_right = 4,
+      pad_bottom = 2,
+      scrollbar_mode = lvgl.SCROLLBAR_MODE.OFF
+    }
+    theme.set_subject(header, "header")
+
+    if self.breadcrumb then
+      header:Label {
+        text = self.breadcrumb,
+        text_font = font.fusion_10
+      }
+    end
+
+    local get_icon_func = function(item)
+      if item:is_directory() then
+        return img.files
+      else
+        return img.enqueue
+      end
+    end
+
+    widgets.InfiniteList(self.root, playlist_iterator:create(self.iterator), {
+      focus_first_item = true,
+      get_icon = get_icon_func,
+      callback = function(item)
+        return function()
+          if item:is_directory() then
+            backstack.push(
+              require("playlist_browser"):new {
+                title = self.title,
+                iterator = filesystem.iterator(item:filepath()),
+                breadcrumb = item:filepath()
+              })
+          elseif
+              playlist_iterator:is_playlist(item) then
+            -- TODO: playlist viewer
+            queue.open_playlist(item:filepath())
+            playback.playing:set(true)
+            backstack.push(playing:new())
+          end
+        end
+      end
+    })
+  end
+}

lua/playlist_iterator.lua

@@ -0,0 +1,35 @@
+local PlaylistIterator = {}
+
+function PlaylistIterator:is_playlist(item)
+  return item:filepath():match("%.playlist$")
+      or item:filepath():match("%.m3u8?$")
+end
+
+function PlaylistIterator:create(fs_iterator)
+  local iterator = fs_iterator:clone()
+  local obj = {};
+
+  local find_matching = function(iterate_fn)
+    local next = iterate_fn(iterator);
+    while next and (not PlaylistIterator:is_playlist(next) and not next:is_directory()) do
+      next = iterate_fn();
+    end
+    return next;
+  end
+
+  function obj:clone()
+    return PlaylistIterator:create(iterator)
+  end
+
+  function obj:next()
+    return find_matching(iterator.next)
+  end
+
+  function obj:prev()
+    return find_matching(iterator.prev)
+  end
+
+  return obj
+end
+
+return PlaylistIterator

lua/widgets.lua

@@ -361,7 +361,7 @@ function widgets.InfiniteList(parent, iterator, opts)
   end
 
   for idx = 0, 8 do
-    local val = fwd_iterator()
+    local val = fwd_iterator:next()
     if not val then
       break
     end