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src-tauri/src/agent_id.rs

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+//! 从应用目录 `resources/data/agent` 读取代理编号。
+
+use std::path::{Path, PathBuf};
+
+use serde_json::Value;
+use tauri::{AppHandle, Manager, path::BaseDirectory};
+
+/// 相对可执行文件目录的代理配置路径：`resources/data/agent`。
+pub const AGENT_RESOURCE_RELATIVE: &[&str] = &["resources", "data", "agent"];
+
+/// 开发时源码树中的代理配置路径。
+pub const AGENT_DEV_RELATIVE: &str = "src-tauri/resources/data/agent";
+
+pub fn read_agent_id_file(path: &Path) -> Option<i64> {
+    let content = std::fs::read_to_string(path).ok()?;
+    parse_agent_id_content(&content)
+}
+
+/// 解析代理配置文件路径（打包资源 → 应用目录 → 开发目录）。
+pub fn resolve_agent_id_path(handle: &AppHandle) -> Option<PathBuf> {
+    if let Ok(path) = handle.path().resolve("data/agent", BaseDirectory::Resource) {
+        if path.is_file() {
+            return Some(path);
+        }
+    }
+    locate_agent_id_file()
+}
+
+/// 读取当前应用的代理编号；无配置文件时返回 `None`。
+pub fn load_agent_id(handle: &AppHandle) -> Option<i64> {
+    resolve_agent_id_path(handle).and_then(|path| read_agent_id_file(&path))
+}
+
+/// 按可执行文件旁 `resources/data/agent` 或开发目录定位配置文件。
+pub fn locate_agent_id_file() -> Option<PathBuf> {
+    if let Ok(path) = std::env::var("AICLIENT_AGENT_FILE") {
+        let custom = PathBuf::from(path);
+        if custom.is_file() {
+            return Some(custom);
+        }
+    }
+
+    if let Ok(exe) = std::env::current_exe() {
+        if let Some(dir) = exe.parent() {
+            let bundled = dir.join(path_from_parts(AGENT_RESOURCE_RELATIVE));
+            if bundled.is_file() {
+                return Some(bundled);
+            }
+        }
+    }
+
+    let dev = PathBuf::from(AGENT_DEV_RELATIVE);
+    if dev.is_file() {
+        return Some(dev);
+    }
+
+    None
+}
+
+fn path_from_parts(parts: &[&str]) -> PathBuf {
+    let mut path = PathBuf::new();
+    for part in parts {
+        path.push(part);
+    }
+    path
+}
+
+fn parse_agent_id_content(content: &str) -> Option<i64> {
+    let trimmed = content.trim();
+    if trimmed.is_empty() {
+        return None;
+    }
+
+    if let Ok(value) = serde_json::from_str::<Value>(trimmed) {
+        if let Some(id) = value.get("agent_id").and_then(|v| v.as_i64()) {
+            if id >= 1 {
+                return Some(id);
+            }
+        }
+        if let Some(id) = value.as_i64() {
+            if id >= 1 {
+                return Some(id);
+            }
+        }
+    }
+
+    let first_line = trimmed.lines().next()?.trim();
+    let id: i64 = first_line.parse().ok()?;
+    if id >= 1 {
+        Some(id)
+    } else {
+        None
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn parse_integer_line() {
+        assert_eq!(parse_agent_id_content("5\n"), Some(5));
+    }
+
+    #[test]
+    fn parse_json_object() {
+        assert_eq!(parse_agent_id_content(r#"{"agent_id":7}"#), Some(7));
+    }
+
+    #[test]
+    fn invalid_returns_none() {
+        assert_eq!(parse_agent_id_content("abc"), None);
+        assert_eq!(parse_agent_id_content(""), None);
+    }
+}