From 6ff8b5886ef91ed46dba08686900d519f6c9c62d Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Mon, 19 Jun 2023 08:51:34 +1000
Subject: Support playing tracks by track id

---
 src/audio/fatfs_audio_input.cpp | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

(limited to 'src/audio/fatfs_audio_input.cpp')

diff --git a/src/audio/fatfs_audio_input.cpp b/src/audio/fatfs_audio_input.cpp
index c26ff0ad..77b104d3 100644
--- a/src/audio/fatfs_audio_input.cpp
+++ b/src/audio/fatfs_audio_input.cpp
@@ -8,7 +8,9 @@
 #include <stdint.h>
 
 #include <algorithm>
+#include <chrono>
 #include <cstdint>
+#include <future>
 #include <memory>
 #include <string>
 #include <variant>
@@ -38,6 +40,7 @@ namespace audio {
 
 FatfsAudioInput::FatfsAudioInput()
     : IAudioElement(),
+      pending_path_(),
       current_file_(),
       is_file_open_(false),
       current_container_(),
@@ -45,11 +48,19 @@ FatfsAudioInput::FatfsAudioInput()
 
 FatfsAudioInput::~FatfsAudioInput() {}
 
+auto FatfsAudioInput::OpenFile(std::future<std::optional<std::string>>&& path)
+    -> void {
+  pending_path_ = std::move(path);
+}
+
 auto FatfsAudioInput::OpenFile(const std::string& path) -> bool {
   if (is_file_open_) {
     f_close(&current_file_);
     is_file_open_ = false;
   }
+  if (pending_path_) {
+    pending_path_ = {};
+  }
   ESP_LOGI(kTag, "opening file %s", path.c_str());
 
   database::TagParserImpl tag_parser;
@@ -89,16 +100,33 @@ auto FatfsAudioInput::OpenFile(const std::string& path) -> bool {
     return false;
   }
 
+  events::Dispatch<InputFileOpened, AudioState>({});
   is_file_open_ = true;
   return true;
 }
 
 auto FatfsAudioInput::NeedsToProcess() const -> bool {
-  return is_file_open_;
+  return is_file_open_ || pending_path_;
 }
 
 auto FatfsAudioInput::Process(const std::vector<InputStream>& inputs,
                               OutputStream* output) -> void {
+  if (pending_path_) {
+    ESP_LOGI(kTag, "waiting for path");
+    if (!pending_path_->valid()) {
+      pending_path_ = {};
+    } else {
+      if (pending_path_->wait_for(std::chrono::seconds(0)) ==
+          std::future_status::ready) {
+        ESP_LOGI(kTag, "path ready!");
+        auto result = pending_path_->get();
+        if (result) {
+          OpenFile(*result);
+        }
+      }
+    }
+  }
+
   if (!is_file_open_) {
     return;
   }
-- 
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