Toob File Player checkpoint.

src/AudioFiles.cpp

@@ -0,0 +1,149 @@
+/*
+ *   Copyright (c) 2025 Robin E. R. Davies
+ *   All rights reserved.
+
+ *   Permission is hereby granted, free of charge, to any person obtaining a copy
+ *   of this software and associated documentation files (the "Software"), to deal
+ *   in the Software without restriction, including without limitation the rights
+ *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ *   copies of the Software, and to permit persons to whom the Software is
+ *   furnished to do so, subject to the following conditions:
+ 
+ *   The above copyright notice and this permission notice shall be included in all
+ *   copies or substantial portions of the Software.
+ 
+ *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ *   SOFTWARE.
+ */
+
+
+ #include "AudioFiles.hpp"
+ #include <filesystem>
+ #include <limits>
+
+ #include <sqlite3.h>
+
+
+ using namespace pipedal;
+
+
+static constexpr size_t INVALID_INDEX = std::numeric_limits<size_t>::max();
+
+ namespace fs = std::filesystem;
+
+ namespace {
+    class DirectoryList {
+    public:
+        DirectoryList(const fs::path&path);
+    
+        const std::vector<std::filesystem::path> &files() {
+            return files_;
+        }
+    private:
+
+        std::vector<std::filesystem::path> files_;
+    };
+    
+    class AudioFileInfoImpl: public AudioFileInfo {
+    public:
+        virtual ~AudioFileInfoImpl() { }
+    protected:
+        virtual std::string GetNextAudioFile(const std::string&path) override;
+        virtual std::string GetPreviousAudioFile(const std::string&path) override;
+    };
+    /////////////////////
+
+    DirectoryList::DirectoryList(const fs::path&path)
+    {
+        for (const auto&dirEntry: fs::directory_iterator(path))
+        {
+            if (dirEntry.is_regular_file())
+            {
+                fs::path t = dirEntry.path();
+                if (!t.filename().string().starts_with('.'))
+                {
+                    files_.push_back(std::move(t));
+                }
+            }
+        }
+    }
+    
+    std::string AudioFileInfoImpl::GetNextAudioFile(const std::string&path_) {
+        try
+        {
+            fs::path path {path_};
+            if (fs::exists(path) && fs::is_regular_file(path))
+            {
+                DirectoryList directoryList(path.parent_path());
+                size_t index = INVALID_INDEX;
+                auto &files = directoryList.files();
+                for (size_t i= 0; i < files.size(); ++i)
+                {
+                    if (files[i] == path)
+                    {
+                        size_t next = i;
+                        if (next == files.size()-1)
+                        {
+                            next = 0;
+                        } else {
+                            ++next;
+                        }
+                        return files[next];
+                    }
+                }
+
+            } 
+        } catch (const std::exception&e)
+        {
+
+        }
+        return "";
+
+    }
+    std::string AudioFileInfoImpl::GetPreviousAudioFile(const std::string&path_) 
+    {
+        try
+        {
+            fs::path path {path_};
+            if (fs::exists(path) && fs::is_regular_file(path))
+            {
+                DirectoryList directoryList(path.parent_path());
+                size_t index = INVALID_INDEX;
+                auto &files = directoryList.files();
+                for (size_t i= 0; i < files.size(); ++i)
+                {
+                    if (files[i] == path)
+                    {
+                        size_t previous = i;
+                        if (previous == 0)
+                        {
+                            previous = files.size()-1;
+                        } else {
+                            --previous;
+                        }
+                        return files[previous];
+                    }
+                }
+
+            } 
+        } catch (const std::exception&e)
+        {
+
+        }
+        return "";
+
+    }
+
+ }
+
+ static AudioFileInfoImpl instance;
+
+ AudioFileInfo&AudioFileInfo::GetInstance()
+ {
+    return instance;
+ }