feat(picker): save and read configuration on disk. #2.

src-tauri/Cargo.lock

@@ -584,6 +584,7 @@ dependencies = [
  "serde_json",
  "tauri",
  "tauri-build",
+ "test_dir",
  "time",
  "tokio",
  "tracing",
@@ -3165,6 +3166,15 @@ dependencies = [
  "utf-8",
 ]
 
+[[package]]
+name = "test_dir"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fc19daf9fc57fadcf740c4abaaa0cd08d9ce22a2a0629aaf6cbd9ae4b80683a"
+dependencies = [
+ "rand 0.8.5",
+]
+
 [[package]]
 name = "thin-slice"
 version = "0.1.1"

src-tauri/Cargo.toml

@@ -41,3 +41,6 @@ default = [ "custom-protocol" ]
 # this feature is used used for production builds where `devPath` points to the filesystem
 # DO NOT remove this
 custom-protocol = [ "tauri/custom-protocol" ]
+
+[dev-dependencies]
+test_dir = "0.2.0"

src-tauri/src/picker/config/display_config.rs

@@ -1,11 +1,13 @@
-#[derive(Clone, Copy)]
+use serde::{Deserialize, Serialize};
+
+#[derive(Clone, Copy, Serialize, Deserialize)]
 pub struct LedStripConfig {
     pub index: usize,
     pub global_start_position: usize,
     pub global_end_position: usize,
 }
 
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy, Serialize, Deserialize)]
 pub struct DisplayConfig {
     pub index_of_display: usize,
     pub display_width: usize,
@@ -16,17 +18,6 @@ pub struct DisplayConfig {
     pub right_led_strip: LedStripConfig,
 }
 
-#[derive(Clone, Copy)]
-pub enum LedFlowX {
-    LR, // from left to right
-    RL, // from right to left
-}
-#[derive(Clone, Copy)]
-pub enum LedFlowY {
-    TB, // from top to bottom
-    BT, // from bottom to top
-}
-
 impl DisplayConfig {
     pub fn default(index_of_display: usize, display_width: usize, display_height: usize) -> Self {
         Self {

src-tauri/src/picker/config/manger.rs

@@ -0,0 +1,122 @@
+use std::{
+    env::current_dir,
+    fs::{self, File},
+    io::Read,
+    path::PathBuf,
+};
+
+use once_cell::sync::OnceCell;
+use serde::{Deserialize, Serialize};
+use tauri::api::path::config_dir;
+
+use super::DisplayConfig;
+
+#[derive(Serialize, Deserialize, Clone)]
+pub struct Configuration {
+    config_version: u8,
+    display_configs: Vec<DisplayConfig>,
+}
+
+impl Configuration {
+    pub fn default() -> Self {
+        Self {
+            config_version: 1,
+            display_configs: vec![],
+        }
+    }
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Manager {
+    config: Configuration,
+}
+
+impl Manager {
+    pub fn global() -> &'static Manager {
+        static DISPLAY_CONFIG_MANAGE: OnceCell<Manager> = OnceCell::new();
+
+        DISPLAY_CONFIG_MANAGE.get_or_init(|| Self::init_from_disk())
+    }
+
+    pub fn default() -> Self {
+        Self::new(Configuration::default())
+    }
+
+    pub fn new(config: Configuration) -> Self {
+        Self { config }
+    }
+
+    pub fn get_config_file_path() -> PathBuf {
+        config_dir()
+            .unwrap_or(current_dir().unwrap())
+            .join("display_config.json")
+    }
+
+    pub fn init_from_disk() -> Self {
+        let config_file_path = Self::get_config_file_path();
+        match Self::read_config_from_disk(config_file_path) {
+            Ok(config) => Self::new(config),
+            Err(_) => Self::default(),
+        }
+    }
+
+    pub fn read_config_from_disk(config_file_path: PathBuf) -> anyhow::Result<Configuration> {
+        let mut file = File::open(config_file_path)
+            .map_err(|error| anyhow::anyhow!("config file is not existed. {}", error))?;
+        let mut contents = String::new();
+        file.read_to_string(&mut contents)
+            .map_err(|error| anyhow::anyhow!("can not read config file. {}", error))?;
+        serde_json::from_str(&contents)
+            .map_err(|error| anyhow::anyhow!("can not parse config file contents. {}", error))
+    }
+
+    pub fn write_config_to_disk(&self, config_file_path: PathBuf) -> anyhow::Result<()> {
+        let contents = serde_json::to_string(&self.config)
+            .map_err(|error| anyhow::anyhow!("can not serialize config. {}", error))?;
+        fs::write(config_file_path, contents.as_bytes())
+            .map_err(|error| anyhow::anyhow!("can not write config file. {}", error))?;
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use std::fs;
+
+    use serde_json::json;
+    use test_dir::{DirBuilder, TestDir};
+
+    use crate::picker::config::Configuration;
+
+    #[test]
+    fn write_config_to_disk_should_be_successful() {
+        let temp = TestDir::temp().create("config_dir", test_dir::FileType::Dir);
+        let config_file_path = temp.path("config_dir").join("picker.config.json");
+        let manager = crate::picker::config::manger::Manager::default();
+        manager
+            .write_config_to_disk(config_file_path.clone())
+            .unwrap();
+
+        let contents = fs::read_to_string(config_file_path.clone()).unwrap();
+        let _config: Configuration = serde_json::from_str(contents.as_str()).unwrap();
+    }
+
+    #[test]
+    fn read_config_to_disk_should_be_successful() {
+        let temp = TestDir::temp().create("config_dir", test_dir::FileType::Dir);
+        let config_file_path = temp.path("config_dir").join("picker.config.json");
+        fs::write(
+            config_file_path.clone(),
+            json!({
+                "config_version": 1,
+                "display_configs": []
+            })
+            .to_string()
+            .as_bytes(),
+        ).unwrap();
+        let _manager =
+            crate::picker::config::manger::Manager::read_config_from_disk(config_file_path.clone())
+                .unwrap();
+    }
+}

src-tauri/src/picker/config/mod.rs

@@ -0,0 +1,5 @@
+mod display_config;
+mod manger;
+
+pub use display_config::*;
+pub use manger::*;

src-tauri/src/picker/manager.rs

@@ -5,10 +5,7 @@ use scrap::Display;
 use std::sync::Arc;
 use tokio::{sync::Mutex, task};
 
-use crate::picker::{
-    config::{LedFlowX, LedFlowY, LedStripConfig},
-    screen::Screen,
-};
+use crate::picker::{config::LedStripConfig, screen::Screen};
 
 use super::{
     config::DisplayConfig, display_picker::DisplayPicker, led_color::LedColor,