use std::collections::HashMap;use std::{env, fs}; use serde::Deserialize;use zed_extension_api::{self as zed, serde_json, Result}; const SERVER_PATH: &str = "node_modules/@astrojs/language-server/bin/nodeServer.js";const PACKAGE_NAME: &str = "@astrojs/language-server"; const TYPESCRIPT_PACKAGE_NAME: &str = "typescript"; /// The relative path to TypeScript's SDK.const TYPESCRIPT_TSDK_PATH: &str = "node_modules/typescript/lib"; #[derive(Debug, Deserialize)]#[serde(rename_all = "camelCase")]struct PackageJson {    #[serde(default)]    dependencies: HashMap<String, String>,    #[serde(default)]    dev_dependencies: HashMap<String, String>,} struct AstroExtension {    did_find_server: bool,    typescript_tsdk_path: String,} impl AstroExtension {    fn server_exists(&self) -> bool {        fs::metadata(SERVER_PATH).map_or(false, |stat| stat.is_file())    }     fn server_script_path(        &mut self,        language_server_id: &zed::LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<String> {        let server_exists = self.server_exists();        if self.did_find_server && server_exists {            self.install_typescript_if_needed(worktree)?;            return Ok(SERVER_PATH.to_string());        }         zed::set_language_server_installation_status(            language_server_id,            &zed::LanguageServerInstallationStatus::CheckingForUpdate,        );        let version = zed::npm_package_latest_version(PACKAGE_NAME)?;         if !server_exists            || zed::npm_package_installed_version(PACKAGE_NAME)?.as_ref() != Some(&version)        {            zed::set_language_server_installation_status(                language_server_id,                &zed::LanguageServerInstallationStatus::Downloading,            );            let result = zed::npm_install_package(PACKAGE_NAME, &version);            match result {                Ok(()) => {                    if !self.server_exists() {                        Err(format!(                            "installed package '{PACKAGE_NAME}' did not contain expected path '{SERVER_PATH}'",                        ))?;                    }                }                Err(error) => {                    if !self.server_exists() {                        Err(error)?;                    }                }            }        }         self.install_typescript_if_needed(worktree)?;        self.did_find_server = true;        Ok(SERVER_PATH.to_string())    }     /// Returns whether a local copy of TypeScript exists in the worktree.    fn typescript_exists_for_worktree(&self, worktree: &zed::Worktree) -> Result<bool> {        let package_json = worktree.read_text_file("package.json")?;        let package_json: PackageJson = serde_json::from_str(&package_json)            .map_err(|err| format!("failed to parse package.json: {err}"))?;         let dev_dependencies = &package_json.dev_dependencies;        let dependencies = &package_json.dependencies;         // Since the extension is not allowed to read the filesystem within the project        // except through the worktree (which does not contains `node_modules`), we check        // the `package.json` to see if `typescript` is listed in the dependencies.        Ok(dev_dependencies.contains_key(TYPESCRIPT_PACKAGE_NAME)            || dependencies.contains_key(TYPESCRIPT_PACKAGE_NAME))    }     fn install_typescript_if_needed(&mut self, worktree: &zed::Worktree) -> Result<()> {        if self            .typescript_exists_for_worktree(worktree)            .unwrap_or_default()        {            println!("found local TypeScript installation at '{TYPESCRIPT_TSDK_PATH}'");            return Ok(());        }         let installed_typescript_version =            zed::npm_package_installed_version(TYPESCRIPT_PACKAGE_NAME)?;        let latest_typescript_version = zed::npm_package_latest_version(TYPESCRIPT_PACKAGE_NAME)?;         if installed_typescript_version.as_ref() != Some(&latest_typescript_version) {            println!("installing {TYPESCRIPT_PACKAGE_NAME}@{latest_typescript_version}");            zed::npm_install_package(TYPESCRIPT_PACKAGE_NAME, &latest_typescript_version)?;        } else {            println!("typescript already installed");        }         self.typescript_tsdk_path = env::current_dir()            .unwrap()            .join(TYPESCRIPT_TSDK_PATH)            .to_string_lossy()            .to_string();         Ok(())    }} impl zed::Extension for AstroExtension {    fn new() -> Self {        Self {            did_find_server: false,            typescript_tsdk_path: TYPESCRIPT_TSDK_PATH.to_owned(),        }    }     fn language_server_command(        &mut self,        language_server_id: &zed::LanguageServerId,        worktree: &zed::Worktree,    ) -> Result<zed::Command> {        let server_path = self.server_script_path(language_server_id, worktree)?;        Ok(zed::Command {            command: zed::node_binary_path()?,            args: vec![                env::current_dir()                    .unwrap()                    .join(&server_path)                    .to_string_lossy()                    .to_string(),                "--stdio".to_string(),            ],            env: Default::default(),        })    }     fn language_server_initialization_options(        &mut self,        _language_server_id: &zed::LanguageServerId,        _worktree: &zed::Worktree,    ) -> Result<Option<serde_json::Value>> {        Ok(Some(serde_json::json!({            "provideFormatter": true,            "typescript": {                "tsdk": self.typescript_tsdk_path            }        })))    }} zed::register_extension!(AstroExtension);