From 6320ba96e099bb73ac419062ee56fe0a0a87cd69 Mon Sep 17 00:00:00 2001
From: Fritz Heiden <fritz.heiden@mailbox.org>
Date: Tue, 27 May 2025 12:31:08 +0200
Subject: [PATCH] feat: add file manager and file browser view

---
 data/audio/some_song.mp3           |   0
 data/test_file.txt                 |   0
 include/lv_conf.h                  |   2 +-
 platformio.ini                     |   1 +
 src/input/user_input_manager.cpp   |   2 -
 src/main.cpp                       |   2 +
 src/tools/file_manager.cpp         |  47 ++++++++++++
 src/tools/file_manager.hpp         |  21 +++++
 src/ui/display.cpp                 |   4 -
 src/ui/views/file_browser_view.cpp | 119 +++++++++++++++++++++++++++++
 src/ui/views/file_browser_view.hpp |  12 +++
 src/ui/views/main_view.cpp         |  31 +-------
 12 files changed, 206 insertions(+), 35 deletions(-)
 create mode 100644 data/audio/some_song.mp3
 create mode 100644 data/test_file.txt
 create mode 100644 src/tools/file_manager.cpp
 create mode 100644 src/tools/file_manager.hpp
 create mode 100644 src/ui/views/file_browser_view.cpp
 create mode 100644 src/ui/views/file_browser_view.hpp

diff --git a/data/audio/some_song.mp3 b/data/audio/some_song.mp3
new file mode 100644
index 0000000..e69de29
diff --git a/data/test_file.txt b/data/test_file.txt
new file mode 100644
index 0000000..e69de29
diff --git a/include/lv_conf.h b/include/lv_conf.h
index aab9a5d..283862f 100644
--- a/include/lv_conf.h
+++ b/include/lv_conf.h
@@ -285,7 +285,7 @@
     *LV_LOG_LEVEL_ERROR       Only critical issue, when the system may fail
     *LV_LOG_LEVEL_USER        Only logs added by the user
     *LV_LOG_LEVEL_NONE        Do not log anything*/
-    #define LV_LOG_LEVEL LV_LOG_LEVEL_INFO
+    #define LV_LOG_LEVEL LV_LOG_LEVEL_WARN
 
     /*1: Print the log with 'printf';
     *0: User need to register a callback with `lv_log_register_print_cb()`*/
diff --git a/platformio.ini b/platformio.ini
index b47e359..4c5b70a 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -13,6 +13,7 @@ platform = espressif32
 board = esp32doit-devkit-v1
 framework = arduino
 monitor_speed = 115200
+board_build.filesystem = littlefs
 lib_deps = 
 	ruiseixasm/Versatile_RotaryEncoder@^1.3.1
 	bodmer/TFT_eSPI@^2.5.43
diff --git a/src/input/user_input_manager.cpp b/src/input/user_input_manager.cpp
index 15393ef..455d99f 100644
--- a/src/input/user_input_manager.cpp
+++ b/src/input/user_input_manager.cpp
@@ -51,10 +51,8 @@ namespace UserInputManager
 
     void pushEvent(InputEvent event)
     {
-        Serial.println("pushing new event " + String(event));
         for (auto &queue : input_event_queues)
         {
-            Serial.println("pushing event to queue " + queue.first + " (" + String(queue.second.size()) + ")");
             queue.second.push(event);
         }
     }
diff --git a/src/main.cpp b/src/main.cpp
index 0e0d7fb..795a8ff 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -15,6 +15,7 @@
 #include <input/pad_reader.hpp>
 #include <input/user_input_manager.hpp>
 #include <audio/tone_generator.hpp>
+#include <tools/file_manager.hpp>
 
 const int ONBOARD_LED_PIN = 2;
 
@@ -25,6 +26,7 @@ void setup()
 
   PadReader::init();
   Encoder::init();
+  FileManager::init();
   Display::init();
   ToneGenerator::init();
   UserInputManager::init();
diff --git a/src/tools/file_manager.cpp b/src/tools/file_manager.cpp
new file mode 100644
index 0000000..6ac6fdb
--- /dev/null
+++ b/src/tools/file_manager.cpp
@@ -0,0 +1,47 @@
+#include <Arduino.h>
+#include <LittleFS.h>
+
+#include <tools/file_manager.hpp>
+
+#include <vector>
+
+namespace FileManager
+{
+    using std::vector;
+
+    void init()
+    {
+        if (!LittleFS.begin())
+        {
+            Serial.println("LittleFS Mount Failed");
+            return;
+        }
+    }
+
+    vector<File> listFiles(const String path)
+    {
+        vector<File> files;
+
+        fs::File root = LittleFS.open(path, "r");
+        if (!root)
+        {
+            Serial.println("Failed to open root directory");
+        }
+        if (!root.isDirectory())
+        {
+            Serial.println("Root is not a directory");
+        }
+
+        fs::File fsFile = root.openNextFile();
+        while (fsFile)
+        {
+            File file;
+            file.name = fsFile.name();
+            file.isDirectory = fsFile.isDirectory();
+            files.push_back(file);
+            fsFile = root.openNextFile();
+        }
+
+        return files;
+    }
+}
\ No newline at end of file
diff --git a/src/tools/file_manager.hpp b/src/tools/file_manager.hpp
new file mode 100644
index 0000000..1ceb195
--- /dev/null
+++ b/src/tools/file_manager.hpp
@@ -0,0 +1,21 @@
+#ifndef DRUMZ_TOOLS_FILE_MANAGER
+#define DRUMZ_TOOLS_FILE_MANAGER
+
+#include <Arduino.h>
+#include <vector>
+
+namespace FileManager
+{
+    using std::vector;
+
+    struct File
+    {
+        String name;
+        bool isDirectory;
+    };
+
+    void init();
+    vector<File> listFiles(const String path);
+}
+
+#endif //DRUMZ_TOOLS_FILE_MANAGER
\ No newline at end of file
diff --git a/src/ui/display.cpp b/src/ui/display.cpp
index 950dd81..d9d48c7 100644
--- a/src/ui/display.cpp
+++ b/src/ui/display.cpp
@@ -167,22 +167,18 @@ namespace Display
     case InputEvent::EncoderButtonRelease:
       data->key = LV_KEY_ENTER;
       data->state = LV_INDEV_STATE_RELEASED;
-      Serial.println("indev event EncoderButtonRelease");
       break;
     case InputEvent::EncoderButtonPress:
       data->key = LV_KEY_ENTER;
       data->state = LV_INDEV_STATE_PRESSED;
-      Serial.println("indev event EncoderButtonPress");
       break;
     case InputEvent::EncoderRotateLeft:
       data->key = LV_KEY_PREV;
       data->state = LV_INDEV_STATE_PRESSED;
-      Serial.println("indev event EncoderRotateLeft");
       break;
     case InputEvent::EncoderRotateRight:
       data->key = LV_KEY_NEXT;
       data->state = LV_INDEV_STATE_PRESSED;
-      Serial.println("indev event EncoderRotateRight");
       break;
     }
   }
diff --git a/src/ui/views/file_browser_view.cpp b/src/ui/views/file_browser_view.cpp
new file mode 100644
index 0000000..156c6c3
--- /dev/null
+++ b/src/ui/views/file_browser_view.cpp
@@ -0,0 +1,119 @@
+#include <Arduino.h>
+#include <lvgl.h>
+#include <vector>
+
+#include <tools/file_manager.hpp>
+
+namespace FileBrowserView
+{
+  using FileManager::File;
+  using std::vector;
+
+  void renderList(lv_obj_t *parent);
+  void updateList();
+  void changeDirRelative(String dir);
+  void changeDir(String dir);
+
+  static vector<File> files;
+  String currentDir = "/";
+
+  lv_obj_t *label;
+  lv_obj_t *list;
+  lv_obj_t *content;
+  lv_group_t *group;
+  lv_indev_t *indev;
+
+  void render(lv_obj_t *parent, lv_indev_t *newIndev)
+  {
+    indev = newIndev;
+    group = lv_group_create();
+    lv_indev_set_group(indev, group);
+    content = lv_obj_create(parent);
+    lv_obj_set_width(content, lv_pct(100));
+    lv_obj_set_height(content, lv_pct(100));
+    lv_obj_center(content);
+
+    files = FileManager::listFiles(currentDir);
+    lv_obj_clean(content);
+    renderList(parent);
+  }
+
+  void update()
+  {
+  }
+
+  void renderList(lv_obj_t *parent)
+  {
+    list = lv_list_create(parent);
+    lv_obj_set_width(list, lv_pct(100));
+    lv_obj_set_height(list, lv_pct(100));
+    lv_obj_center(list);
+    updateList();
+  }
+
+  void updateList()
+  {
+    lv_obj_clean(list);
+
+    lv_obj_t *btn;
+    if (currentDir != "/")
+    {
+      btn = lv_list_add_btn(list, LV_SYMBOL_DIRECTORY, "..");
+      lv_group_add_obj(group, btn);
+      auto callback = [](lv_event_t *event) {
+        changeDirRelative("..");
+      };
+      lv_obj_add_event_cb(btn, callback, LV_EVENT_CLICKED, NULL);
+    }
+
+    for (int i = 0; i < files.size(); i++)
+    {
+      File file = files.at(i);
+      auto symbol = file.isDirectory? LV_SYMBOL_DIRECTORY : LV_SYMBOL_FILE;
+      btn = lv_list_add_btn(list, symbol, file.name.c_str());
+      lv_group_add_obj(group, btn);
+
+      auto callback = [](lv_event_t *event) {
+        File *file = (File *)lv_event_get_user_data(event);
+        if (!file->isDirectory)
+          return;
+        changeDirRelative(file->name);
+      };
+      Serial.println(file.name + "\t" + (int)&files.at(i));
+      lv_obj_add_event_cb(btn, callback, LV_EVENT_CLICKED, &files.at(i));
+    }
+  }
+
+  void changeDirRelative(String dir)
+  {
+    String newDir = currentDir;
+    if (dir == "..")
+    {
+      if (currentDir == "/")
+        return;
+      if (newDir.endsWith("/"))
+      {
+        newDir = newDir.substring(0, newDir.length() - 1);
+      }
+      int lastSlash = newDir.lastIndexOf("/");
+      if (lastSlash == -1)
+      {
+        return;
+      }
+      newDir = newDir.substring(0, lastSlash + 1);
+    }
+    else
+    {
+      newDir = newDir + dir + "/";
+    }
+    changeDir(newDir);
+  }
+
+  void changeDir(String dir)
+  {
+    Serial.println("changeDir: " + dir);
+    currentDir = dir;
+    files = FileManager::listFiles(currentDir);
+    updateList();
+  }
+}
\ No newline at end of file
diff --git a/src/ui/views/file_browser_view.hpp b/src/ui/views/file_browser_view.hpp
new file mode 100644
index 0000000..10f8285
--- /dev/null
+++ b/src/ui/views/file_browser_view.hpp
@@ -0,0 +1,12 @@
+#ifndef DRUMZ_VIEWS_FILE_BROWSER_VIEW
+#define DRUMZ_VIEWS_FILE_BROWSER_VIEW
+
+#include <lvgl.h>
+
+namespace FileBrowserView
+{
+    void update();
+    void render(lv_obj_t *parent, lv_indev_t *indev);
+}
+
+#endif //DRUMZ_VIEWS_FILE_BROWSER_VIEW
\ No newline at end of file
diff --git a/src/ui/views/main_view.cpp b/src/ui/views/main_view.cpp
index 8a3d68a..268beac 100644
--- a/src/ui/views/main_view.cpp
+++ b/src/ui/views/main_view.cpp
@@ -3,6 +3,7 @@
 
 #include <input/encoder.hpp>
 #include <audio/tone_generator.hpp>
+#include <ui/views/file_browser_view.hpp>
 
 #include <vector>
 
@@ -10,41 +11,15 @@ namespace MainView
 {
   using std::vector;
 
-  lv_obj_t *label;
-  lv_obj_t *list;
   String label_text;
 
   void render(lv_obj_t *parent, lv_indev_t *indev)
   {
-    lv_group_t *group = lv_group_create();
-    lv_indev_set_group(indev, group);
-
-    list = lv_list_create(parent);
-    lv_obj_set_width(list, lv_pct(100));
-    lv_obj_set_height(list, lv_pct(100));
-    lv_obj_center(list);
-
-    vector<String> items = {
-        "Michael Jackson",
-        "The Beatles",
-        "Rolling Stones",
-        "Led Zeppelin",
-        "Queen",
-        "Prince",
-        "The Who",
-        "Nirvana",
-        "Pink Floyd",
-        "The Clash"};
-
-    lv_obj_t *btn;
-    for (String item : items)
-    {
-      btn = lv_list_add_btn(list, NULL, item.c_str());
-      lv_group_add_obj(group, btn);
-    }
+    FileBrowserView::render(parent, indev);
   }
 
   void update()
   {
+    FileBrowserView::update();
   }
 }
\ No newline at end of file