1use std::path::Path;
 2use std::sync::Arc;
 3
 4use anyhow::{anyhow, Result};
 5use assistant_tool::Tool;
 6use gpui::{App, Task, WeakEntity, Window};
 7use project::{ProjectPath, WorktreeId};
 8use schemars::JsonSchema;
 9use serde::{Deserialize, Serialize};
10use workspace::Workspace;
11
12#[derive(Debug, Serialize, Deserialize, JsonSchema)]
13pub struct ReadFileToolInput {
14    /// The ID of the worktree in which the file resides.
15    pub worktree_id: usize,
16    /// The path to the file to read.
17    ///
18    /// This path is relative to the worktree root, it must not be an absolute path.
19    pub path: Arc<Path>,
20}
21
22pub struct ReadFileTool;
23
24impl Tool for ReadFileTool {
25    fn name(&self) -> String {
26        "read-file".into()
27    }
28
29    fn description(&self) -> String {
30        "Reads the content of a file specified by a worktree ID and path. Use this tool when you need to access the contents of a file in the project.".into()
31    }
32
33    fn input_schema(&self) -> serde_json::Value {
34        let schema = schemars::schema_for!(ReadFileToolInput);
35        serde_json::to_value(&schema).unwrap()
36    }
37
38    fn run(
39        self: Arc<Self>,
40        input: serde_json::Value,
41        workspace: WeakEntity<Workspace>,
42        _window: &mut Window,
43        cx: &mut App,
44    ) -> Task<Result<String>> {
45        let Some(workspace) = workspace.upgrade() else {
46            return Task::ready(Err(anyhow!("workspace dropped")));
47        };
48
49        let input = match serde_json::from_value::<ReadFileToolInput>(input) {
50            Ok(input) => input,
51            Err(err) => return Task::ready(Err(anyhow!(err))),
52        };
53
54        let project = workspace.read(cx).project().clone();
55        let project_path = ProjectPath {
56            worktree_id: WorktreeId::from_usize(input.worktree_id),
57            path: input.path,
58        };
59        cx.spawn(|cx| async move {
60            let buffer = cx
61                .update(|cx| {
62                    project.update(cx, |project, cx| project.open_buffer(project_path, cx))
63                })?
64                .await?;
65
66            cx.update(|cx| buffer.read(cx).text())
67        })
68    }
69}