added light novel tracking

src/ln/tracker.rs

@@ -0,0 +1,50 @@
+use serde_json;
+use std::fs;
+//
+//
+pub fn get_json() -> serde_json::Value {
+    let config_path = dirs::config_dir().unwrap().join("kami");
+    if !config_path.exists() {
+        fs::create_dir_all(&config_path).unwrap();
+    }
+    let json_path = config_path.join("ln_progress.json");
+    if !json_path.exists() {
+        fs::File::create(&json_path).unwrap();
+    }
+    let json = fs::read_to_string(&json_path).unwrap();
+    let json: serde_json::Value = serde_json::from_str(&json).unwrap_or(serde_json::Value::Null);
+    json
+}
+
+pub fn write_ln_progress(title: &str, current_page: &u32, selected: &usize) {
+    let config_path = dirs::config_dir().unwrap().join("kami");
+    let json_path = config_path.join("ln_progress.json");
+    let json = fs::read_to_string(&json_path).unwrap();
+    let mut json: serde_json::Value =
+        serde_json::from_str(&json).unwrap_or(serde_json::Value::Null);
+    let mut title_json = serde_json::Map::new();
+    title_json.insert(
+        "current_page".to_string(),
+        serde_json::Value::from(current_page.clone()),
+    );
+    title_json.insert(
+        "selected".to_string(),
+        serde_json::Value::from(selected.clone()),
+    );
+    //insert title_json into json
+    if json[title].is_null() {
+        json[title] = serde_json::Value::from(title_json);
+    } else {
+        json[title]["current_page"] = serde_json::Value::from(current_page.clone());
+        json[title]["selected"] = serde_json::Value::from(selected.clone());
+    }
+    let json = serde_json::to_string_pretty(&json).unwrap();
+    fs::write(&json_path, json).unwrap();
+}
+
+pub fn get_ln_progress(title: &str) -> (u32, usize) {
+    let json = get_json();
+    let current_page = json[title]["current_page"].as_u64().unwrap_or(1) as u32;
+    let selected = json[title]["selected"].as_u64().unwrap_or(0) as usize;
+    (current_page, selected)
+}