From 513fce723c7e37aa353844303f36022517f2db43 Mon Sep 17 00:00:00 2001
From: DanConwayDev <DanConwayDev@protonmail.com>
Date: Fri, 25 Jul 2025 21:02:26 +0100
Subject: refactor: move `utils` and `list` helpers to lib

to enable forthcoming `ngit sync` cmd
---
 src/lib/list.rs | 159 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 159 insertions(+)
 create mode 100644 src/lib/list.rs

(limited to 'src/lib/list.rs')

diff --git a/src/lib/list.rs b/src/lib/list.rs
new file mode 100644
index 0000000..b940546
--- /dev/null
+++ b/src/lib/list.rs
@@ -0,0 +1,159 @@
+use std::collections::HashMap;
+
+use anyhow::{Result, anyhow};
+use auth_git2::GitAuthenticator;
+use nostr::hashes::sha1::Hash as Sha1Hash;
+
+use crate::{
+    git::{
+        Repo, RepoActions,
+        nostr_url::{CloneUrl, NostrUrlDecoded, ServerProtocol},
+    },
+    repo_ref::is_grasp_server,
+    utils::{Direction, get_read_protocols_to_try, join_with_and, set_protocol_preference},
+};
+
+pub fn list_from_remotes(
+    term: &console::Term,
+    git_repo: &Repo,
+    git_servers: &Vec<String>,
+    decoded_nostr_url: &NostrUrlDecoded,
+    grasp_servers: &[String],
+) -> HashMap<String, (HashMap<String, String>, bool)> {
+    let mut remote_states = HashMap::new();
+    let mut errors = HashMap::new();
+    for url in git_servers {
+        let is_grasp_server = is_grasp_server(url, grasp_servers);
+        match list_from_remote(term, git_repo, url, decoded_nostr_url, is_grasp_server) {
+            Err(error) => {
+                errors.insert(url, error);
+            }
+            Ok(state) => {
+                remote_states.insert(url.to_string(), (state, is_grasp_server));
+            }
+        }
+    }
+    remote_states
+}
+
+pub fn list_from_remote(
+    term: &console::Term,
+    git_repo: &Repo,
+    git_server_url: &str,
+    decoded_nostr_url: &NostrUrlDecoded,
+    is_grasp_server: bool,
+) -> Result<HashMap<String, String>> {
+    let server_url = git_server_url.parse::<CloneUrl>()?;
+    let protocols_to_attempt =
+        get_read_protocols_to_try(git_repo, &server_url, decoded_nostr_url, is_grasp_server);
+
+    let mut failed_protocols = vec![];
+    let mut remote_state: Option<HashMap<String, String>> = None;
+
+    for protocol in &protocols_to_attempt {
+        term.write_line(
+            format!(
+                "fetching {} ref list over {protocol}...",
+                server_url.short_name(),
+            )
+            .as_str(),
+        )?;
+
+        let formatted_url = server_url.format_as(protocol, &decoded_nostr_url.user)?;
+        let res = list_from_remote_url(
+            git_repo,
+            &formatted_url,
+            [ServerProtocol::UnauthHttps, ServerProtocol::UnauthHttp].contains(protocol),
+            term,
+        );
+
+        match res {
+            Ok(state) => {
+                remote_state = Some(state);
+                term.clear_last_lines(1)?;
+                if !failed_protocols.is_empty() {
+                    term.write_line(
+                        format!(
+                            "list: succeeded over {protocol} from {}",
+                            server_url.short_name(),
+                        )
+                        .as_str(),
+                    )?;
+                    let _ =
+                        set_protocol_preference(git_repo, protocol, &server_url, &Direction::Fetch);
+                }
+                break;
+            }
+            Err(error) => {
+                term.clear_last_lines(1)?;
+                term.write_line(
+                    format!("list: {formatted_url} failed over {protocol}: {error}").as_str(),
+                )?;
+                failed_protocols.push(protocol);
+            }
+        }
+    }
+    if let Some(remote_state) = remote_state {
+        if failed_protocols.is_empty() {
+            term.clear_last_lines(1)?;
+        }
+        Ok(remote_state)
+    } else {
+        let error = anyhow!(
+            "{} failed over {}{}",
+            server_url.short_name(),
+            join_with_and(&failed_protocols),
+            if decoded_nostr_url.protocol.is_some() {
+                " and nostr url contains protocol override so no other protocols were attempted"
+            } else {
+                ""
+            },
+        );
+        term.write_line(format!("list: {error}").as_str())?;
+        Err(error)
+    }
+}
+
+fn list_from_remote_url(
+    git_repo: &Repo,
+    git_server_remote_url: &str,
+    dont_authenticate: bool,
+    term: &console::Term,
+) -> Result<HashMap<String, String>> {
+    let git_config = git_repo.git_repo.config()?;
+
+    let mut git_server_remote = git_repo.git_repo.remote_anonymous(git_server_remote_url)?;
+    // authentication may be required
+    let auth = GitAuthenticator::default();
+    let mut remote_callbacks = git2::RemoteCallbacks::new();
+    if !dont_authenticate {
+        remote_callbacks.credentials(auth.credentials(&git_config));
+    }
+    term.write_line("list: connecting...")?;
+    git_server_remote.connect_auth(git2::Direction::Fetch, Some(remote_callbacks), None)?;
+    term.clear_last_lines(1)?;
+    let mut state = HashMap::new();
+    for head in git_server_remote.list()? {
+        if let Some(symbolic_reference) = head.symref_target() {
+            state.insert(
+                head.name().to_string(),
+                format!("ref: {symbolic_reference}"),
+            );
+        // ignore dereferenced tags
+        } else if !head.name().to_string().ends_with("^{}") {
+            state.insert(head.name().to_string(), head.oid().to_string());
+        }
+    }
+    git_server_remote.disconnect()?;
+    Ok(state)
+}
+
+pub fn get_ahead_behind(
+    git_repo: &Repo,
+    base_ref_or_oid: &str,
+    latest_ref_or_oid: &str,
+) -> Result<(Vec<Sha1Hash>, Vec<Sha1Hash>)> {
+    let base = git_repo.get_commit_or_tip_of_reference(base_ref_or_oid)?;
+    let latest = git_repo.get_commit_or_tip_of_reference(latest_ref_or_oid)?;
+    git_repo.get_commits_ahead_behind(&base, &latest)
+}
-- 
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