# Code Review Result for browserinfocm (Review #3)

## Summary
The `browserinfocm` project has successfully addressed several points raised in previous reviews, such as replacing deprecated functions and improving global state management. This review identifies further refinements in macro implementation, network efficiency, and error handling.

## Improvements Validated from Previous Reviews
- **Modernized Home Directory Access:** The project now uses the `dirs` crate instead of the deprecated `std::env::home_dir()`.
- **Improved Global State:** The `forwarder.rs` backend now uses `std::sync::LazyLock` for `NEXT_URL`, which is more idiomatic and safer than the previous `thread_local!` approach.
- **Refactored Database Logic:** The redundant loops and unnecessary `-1` checks in the main save functions have been removed, leading to cleaner code.

## New Observations and Recommendations

### 1. Refactor `simple_get_or_store!` Macro
The current implementation of the `simple_get_or_store!` macro in `db_sqlite.rs` uses a mutable variable and multiple `if let` blocks. This can be refactored into a more idiomatic `match` statement:
```rust
match sqlx::query(...).bind(val).fetch_one(&mut **tx).await {
    Ok(row) => Ok(row.get(0)),
    Err(sqlx::Error::RowNotFound) => {
        let r = sqlx::query(...).bind(val).execute(&mut **tx).await?;
        Ok(r.last_insert_rowid())
    }
    Err(e) => Err(e.into()),
}
```
This approach is more readable and reduces the chance of returning an uninitialized or incorrect `tbl_id`.

### 2. Reqwest Client Reuse
In `src/li/backends/forwarder.rs`, a new `reqwest::Client` is instantiated for every HTTP request. This prevents the application from benefiting from connection pooling.
- **Recommendation:** Store the `reqwest::Client` in a `LazyLock` or pass it as part of a shared state to improve performance and resource utilization.

### 3. Graceful Handling of Missing Configuration
The `NEXT_URL` in `forwarder.rs` defaults to the string `"Not found env: NEXT_URL"` if the environment variable is missing. This will cause subsequent requests to fail with a URL parsing error.
- **Recommendation:** Consider making `NEXT_URL` an `Option<String>` or using a pattern that allows the application to report a configuration error early during startup rather than failing with a cryptic network error at runtime.

### 4. Robust Parsing of `eval` Results
The `get_browserinfo` function in `src/lib.rs` uses `v.to_string()` on the result of `document::eval`. This often results in JSON-quoted strings (e.g., `"\"value\""`), necessitating manual trimming in the backend.
- **Recommendation:** Use `v.as_str()` to directly obtain the string value if the JS returns a string, or use `serde_json::from_value` for more complex objects to avoid manual string manipulation.

### 5. Configurable Production URL
`src/main.rs` contains a hardcoded URL (`https://aki.omusubi.org/broinfo`) for non-debug builds.
- **Recommendation:** Move this URL to an environment variable or a configuration file to make the component more reusable across different environments without recompilation.

### 6. Data Integrity in `jsinfo`
In `save_broinfo`, newlines in the TOML representation are replaced with `<BR>` before being stored in the database. 
- **Recommendation:** While this might aid in simple visualization, it compromises the integrity of the TOML format. It is generally better to store the raw data and handle formatting at the presentation layer.

### 7. Cleanup of Stale Code
The file `src/li/backends/debug.rs` appears to be stale, with imports that do not match the current project structure.
- **Recommendation:** Remove this file if it is no longer used, or update it to reflect the current `BroInfo` and backend structures.

---
Review Date: 2026-04-17
Reviewer: Gemini CLI Agent
