use std::{ops::Range, sync::Arc}; use anyhow::Result;use async_trait::async_trait;use collections::BTreeMap;use derive_more::{Deref, DerefMut};use gpui::{AppContext, Global};use http_client::HttpClient;use parking_lot::RwLock;use url::Url; use crate::Oid; #[derive(Debug, PartialEq, Eq, Clone)]pub struct PullRequest {    pub number: u32,    pub url: Url,} pub struct BuildCommitPermalinkParams<'a> {    pub sha: &'a str,} pub struct BuildPermalinkParams<'a> {    pub sha: &'a str,    pub path: &'a str,    pub selection: Option<Range<u32>>,} /// A Git hosting provider.#[async_trait]pub trait GitHostingProvider {    /// Returns the name of the provider.    fn name(&self) -> String;     /// Returns the base URL of the provider.    fn base_url(&self) -> Url;     /// Returns a permalink to a Git commit on this hosting provider.    fn build_commit_permalink(        &self,        remote: &ParsedGitRemote,        params: BuildCommitPermalinkParams,    ) -> Url;     /// Returns a permalink to a file and/or selection on this hosting provider.    fn build_permalink(&self, remote: ParsedGitRemote, params: BuildPermalinkParams) -> Url;     /// Returns whether this provider supports avatars.    fn supports_avatars(&self) -> bool;     /// Returns a URL fragment to the given line selection.    fn line_fragment(&self, selection: &Range<u32>) -> String {        if selection.start == selection.end {            let line = selection.start + 1;             self.format_line_number(line)        } else {            let start_line = selection.start + 1;            let end_line = selection.end + 1;             self.format_line_numbers(start_line, end_line)        }    }     /// Returns a formatted line number to be placed in a permalink URL.    fn format_line_number(&self, line: u32) -> String;     /// Returns a formatted range of line numbers to be placed in a permalink URL.    fn format_line_numbers(&self, start_line: u32, end_line: u32) -> String;     fn parse_remote_url(&self, url: &str) -> Option<ParsedGitRemote>;     fn extract_pull_request(        &self,        _remote: &ParsedGitRemote,        _message: &str,    ) -> Option<PullRequest> {        None    }     async fn commit_author_avatar_url(        &self,        _repo_owner: &str,        _repo: &str,        _commit: Oid,        _http_client: Arc<dyn HttpClient>,    ) -> Result<Option<Url>> {        Ok(None)    }} #[derive(Default, Deref, DerefMut)]struct GlobalGitHostingProviderRegistry(Arc<GitHostingProviderRegistry>); impl Global for GlobalGitHostingProviderRegistry {} #[derive(Default)]struct GitHostingProviderRegistryState {    providers: BTreeMap<String, Arc<dyn GitHostingProvider + Send + Sync + 'static>>,} #[derive(Default)]pub struct GitHostingProviderRegistry {    state: RwLock<GitHostingProviderRegistryState>,} impl GitHostingProviderRegistry {    /// Returns the global [`GitHostingProviderRegistry`].    pub fn global(cx: &AppContext) -> Arc<Self> {        cx.global::<GlobalGitHostingProviderRegistry>().0.clone()    }     /// Returns the global [`GitHostingProviderRegistry`], if one is set.    pub fn try_global(cx: &AppContext) -> Option<Arc<Self>> {        cx.try_global::<GlobalGitHostingProviderRegistry>()            .map(|registry| registry.0.clone())    }     /// Returns the global [`GitHostingProviderRegistry`].    ///    /// Inserts a default [`GitHostingProviderRegistry`] if one does not yet exist.    pub fn default_global(cx: &mut AppContext) -> Arc<Self> {        cx.default_global::<GlobalGitHostingProviderRegistry>()            .0            .clone()    }     /// Sets the global [`GitHostingProviderRegistry`].    pub fn set_global(registry: Arc<GitHostingProviderRegistry>, cx: &mut AppContext) {        cx.set_global(GlobalGitHostingProviderRegistry(registry));    }     /// Returns a new [`GitHostingProviderRegistry`].    pub fn new() -> Self {        Self {            state: RwLock::new(GitHostingProviderRegistryState {                providers: BTreeMap::default(),            }),        }    }     /// Returns the list of all [`GitHostingProvider`]s in the registry.    pub fn list_hosting_providers(        &self,    ) -> Vec<Arc<dyn GitHostingProvider + Send + Sync + 'static>> {        self.state.read().providers.values().cloned().collect()    }     /// Adds the provided [`GitHostingProvider`] to the registry.    pub fn register_hosting_provider(        &self,        provider: Arc<dyn GitHostingProvider + Send + Sync + 'static>,    ) {        self.state            .write()            .providers            .insert(provider.name(), provider);    }} #[derive(Debug, PartialEq)]pub struct ParsedGitRemote {    pub owner: Arc<str>,    pub repo: Arc<str>,} pub fn parse_git_remote_url(    provider_registry: Arc<GitHostingProviderRegistry>,    url: &str,) -> Option<(    Arc<dyn GitHostingProvider + Send + Sync + 'static>,    ParsedGitRemote,)> {    provider_registry        .list_hosting_providers()        .into_iter()        .find_map(|provider| {            provider                .parse_remote_url(url)                .map(|parsed_remote| (provider, parsed_remote))        })}