Basic diff command

1 files changed, 103 insertions, 0 deletions

diff --git a/src/inquire.rs b/src/inquire.rs
new file mode 100644
index 0000000..6dd2e3c
--- /dev/null
+++ b/src/inquire.rs
@@ -0,0 +1,103 @@
+use std::fmt::Display;
+
+use chrono::Local;
+use git2::{Signature, Time};
+
+use crate::Autosave;
+
+pub struct AutosaveFilters<'a> {
+	pub signature: &'a Signature<'a>,
+	pub branch: &'a str,
+	pub earliest_time: Time,
+	pub repo_id: &'a str,
+	pub all_users: bool,
+	pub all_branches: bool,
+	pub anytime: bool,
+	pub all_devices: bool,
+}
+
+struct AutosaveOption {
+	text: String,
+	value: Autosave,
+}
+
+impl Display for AutosaveOption {
+	fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+		self.text.fmt(f)
+	}
+}
+
+pub fn filter_autosaves(
+	autosaves: impl IntoIterator<Item = Autosave>,
+	filters: AutosaveFilters<'_>,
+) -> impl Iterator<Item = Autosave> {
+	let AutosaveFilters {
+		all_users,
+		signature,
+		all_branches,
+		branch,
+		anytime,
+		earliest_time,
+		all_devices,
+		repo_id,
+	} = filters;
+	autosaves
+		.into_iter()
+		.filter(move |autosave| {
+			all_users
+				|| signature
+					.name()
+					.zip(autosave.author.clone())
+					.is_some_and(|(a, b)| a == b)
+				|| signature
+					.email()
+					.zip(autosave.email.clone())
+					.is_some_and(|(a, b)| a == b)
+		})
+		.filter(move |autosave| all_branches || autosave.branch_name == branch)
+		.filter(move |autosave| anytime || autosave.time > earliest_time)
+		.filter(move |autosave| all_devices || autosave.repo_id.as_bytes() != repo_id.as_bytes())
+}
+
+pub fn select_autosave(
+	mut autosaves: Vec<Autosave>,
+	all_branches: bool,
+	all_users: bool,
+) -> Result<Autosave, inquire::InquireError> {
+	if autosaves.len() > 1 {
+		let autosaves = autosaves
+			.into_iter()
+			.map(|autosave| {
+				let device = autosave.host_name.as_ref().unwrap_or(&autosave.repo_id);
+				let time = chrono::DateTime::from_timestamp(autosave.time.seconds(), 0)
+					.map(|time| time.with_timezone(&Local))
+					.map(|time| time.to_rfc2822())
+					.unwrap_or(autosave.time.seconds().to_string());
+				let branch = if all_branches {
+					format!(" on {}", &autosave.branch_name)
+				} else {
+					String::new()
+				};
+				let author = if let Some(author) =
+					autosave.author.as_ref().or(autosave.email.as_ref())
+					&& all_users
+				{
+					format!(" by {author}")
+				} else {
+					String::new()
+				};
+				AutosaveOption {
+					text: format!("{device} ({time}{branch}{author})"),
+					value: autosave,
+				}
+			})
+			.collect();
+		Ok(inquire::Select::new("Select an autosave:", autosaves)
+			.prompt()?
+			.value)
+	} else {
+		Ok(autosaves
+			.pop()
+			.expect("There should be an autosave to select but there isn't. This is a bug!"))
+	}
+}