playlist fix (#1043)

* first commit for playlist fix
* format for playlist fix
* playlist fix -textual change
thanks @kallanreed for giving the new name of the extension XD

firmware/application/apps/ui_playlist.cpp

@@ -31,6 +31,7 @@
 #include "portapack.hpp"
 #include "portapack_persistent_memory.hpp"
 #include <unistd.h>
+#include <fstream>
 
 using namespace portapack;
 
@@ -53,11 +54,13 @@ void PlaylistView::load_file(std::filesystem::path playlist_path) {
             if ((int)one_char[0] >= ' ') {
                 line += one_char[0];
             } else if (one_char[0] == '\n') {
+                total_tracks++;
                 txtline_process(line);
                 line.clear();
             }
         }
         if (line.length() > 0) {
+            total_tracks++;
             txtline_process(line);
         }
     }
@@ -91,8 +94,10 @@ void PlaylistView::on_file_changed(std::filesystem::path new_file_path, rf::Freq
     File data_file;
     // Get file size
     auto data_open_error = data_file.open("/" + new_file_path.string());
-    if (data_open_error.is_valid()) {
-        file_error();
+    if (!data_open_error.is_valid()) {
+        track_number++;
+    } else if (data_open_error.is_valid()) {
+        file_error("C16 file\n" + new_file_path.string() + "\nread error.");
         return;
     }
 
@@ -109,6 +114,7 @@ void PlaylistView::on_file_changed(std::filesystem::path new_file_path, rf::Freq
     progressbar.set_max(file_size);
     text_filename.set(file_path.filename().string().substr(0, 12));
     text_duration.set(to_string_time_ms(duration));
+    // text_track.set(std::to_string(track_number) + "/" + std::to_string(total_tracks));
 
     button_play.focus();
 }
@@ -121,8 +127,8 @@ void PlaylistView::focus() {
     button_open.focus();
 }
 
-void PlaylistView::file_error() {
-    nav_.display_modal("Error", "File " + file_path.string() + " read error. " + file_path.string());
+void PlaylistView::file_error(std::string error_message) {
+    nav_.display_modal("Error", "Error for \n" + file_path.string() + "\n" + error_message);
 }
 
 bool PlaylistView::is_active() const {
@@ -136,7 +142,16 @@ bool PlaylistView::loop() const {
 void PlaylistView::toggle() {
     if (is_active()) {
         stop(false);
+        total_tracks = 0;
+        track_number = 0;
+        playlist_db.clear();
+        playlist_masterdb.clear();
     } else {
+        total_tracks = 0;
+        track_number = 0;
+        playlist_db.clear();
+        playlist_masterdb.clear();
+        load_file(now_play_list_file);
         start();
     }
 }
@@ -158,7 +173,7 @@ void PlaylistView::start() {
     auto p = std::make_unique<FileReader>();
     auto open_error = p->open(file_path);
     if (open_error.is_valid()) {
-        file_error();
+        file_error("illegal grammar(176)");
         return;  // Fixes TX bug if there's a file error
     } else {
         reader = std::move(p);
@@ -198,17 +213,41 @@ void PlaylistView::stop(const bool do_loop) {
     if (is_active()) {
         replay_thread.reset();
     }
-    if (do_loop) {
-        if (playlist_db.size() > 0) {
-            start();
+
+    // TODO: the logic here could be more beautiful but maybe they are all same for compiler anyway....
+    // Notes of the logic here in case if it needed to be changed in the future:
+    // 1. check_loop.value() is for the LOOP checkbox
+    // 2. do_loop is a part of the replay thread, not a user - control thing.
+    // 3. when (total_tracks != track_number) is true, it means that the current track is not the last track.
+    // Thus, (do_loop && (total_tracks != track_number)) is for the case when the start() func were called with true AND not the last track.
+    // Which means it do loop until the last track.
+
+    if (check_loop.value()) {
+        if (do_loop) {
+            if (playlist_db.size() > 0) {
+                start();
+            } else {
+                playlist_db = playlist_masterdb;
+                start();
+            }
         } else {
-            playlist_db = playlist_masterdb;
-            start();
+            radio::set_antenna_bias(false);  // Turn off Bias Tee
+            radio::disable();
+            button_play.set_bitmap(&bitmap_play);
+        }
+    } else if (!check_loop.value()) {
+        if (do_loop && (total_tracks != track_number)) {
+            if (playlist_db.size() > 0) {
+                start();
+            } else {
+                playlist_db = playlist_masterdb;
+                start();
+            }
+        } else {
+            radio::set_antenna_bias(false);  // Turn off Bias Tee
+            radio::disable();
+            button_play.set_bitmap(&bitmap_play);
         }
-    } else {
-        radio::set_antenna_bias(false);  // Turn off Bias Tee
-        radio::disable();
-        button_play.set_bitmap(&bitmap_play);
     }
 
     ready_signal = false;
@@ -219,7 +258,7 @@ void PlaylistView::handle_replay_thread_done(const uint32_t return_code) {
         stop(true);
     } else if (return_code == ReplayThread::READ_ERROR) {
         stop(false);
-        file_error();
+        file_error("Illegal grammar(255)");
     }
 
     progressbar.set_value(0);
@@ -240,6 +279,8 @@ PlaylistView::PlaylistView(
         &tx_view,  // this handles now the previous rfgain, rfamp
         &check_loop,
         &button_play,
+        // &text_track,
+        // TODO: add track number
         &waterfall,
     });
 
@@ -264,8 +305,9 @@ PlaylistView::PlaylistView(
     };
 
     button_open.on_select = [this, &nav](Button&) {
-        auto open_view = nav.push<FileLoadView>(".TXT");
+        auto open_view = nav.push<FileLoadView>(".PPL");
         open_view->on_changed = [this](std::filesystem::path new_file_path) {
+            now_play_list_file = new_file_path;
             load_file(new_file_path);
         };
     };