cersei-tools 0.1.9

//! File read tool.

use super::*;
use crate::tool_primitives::fs as pfs;
use serde::Deserialize;

pub struct FileReadTool;

#[async_trait]
impl Tool for FileReadTool {
    fn name(&self) -> &str {
        "Read"
    }
    fn description(&self) -> &str {
        "Read a file from the filesystem."
    }
    fn permission_level(&self) -> PermissionLevel {
        PermissionLevel::ReadOnly
    }
    fn category(&self) -> ToolCategory {
        ToolCategory::FileSystem
    }

    fn input_schema(&self) -> Value {
        serde_json::json!({
            "type": "object",
            "properties": {
                "file_path": { "type": "string", "description": "Absolute path to the file" },
                "offset": { "type": "integer", "description": "Line number to start reading from" },
                "limit": { "type": "integer", "description": "Number of lines to read" }
            },
            "required": ["file_path"]
        })
    }

    async fn execute(&self, input: Value, _ctx: &ToolContext) -> ToolResult {
        #[derive(Deserialize)]
        struct Input {
            file_path: String,
            offset: Option<usize>,
            limit: Option<usize>,
        }

        let input: Input = match serde_json::from_value(input) {
            Ok(i) => i,
            Err(e) => return ToolResult::error(format!("Invalid input: {}", e)),
        };

        let path = std::path::Path::new(&input.file_path);
        if !path.exists() {
            return ToolResult::error(format!("File not found: {}", input.file_path));
        }

        let offset = input.offset.unwrap_or(0);
        let limit = input.limit.unwrap_or(2000);

        match pfs::read_file(path, offset, limit).await {
            Ok(fc) => ToolResult::success(fc.content),
            Err(e) => ToolResult::error(format!("Failed to read file: {}", e)),
        }
    }
}