1 files changed, 144 insertions, 3 deletions
diff --git a/src/show_commit/mod.rs b/src/show_commit/mod.rs
index ba21d8f..cf3ede0 100644
--- a/src/show_commit/mod.rs
+++ b/src/show_commit/mod.rs
@@ -1,6 +1,147 @@
 mod data;
-#[allow(clippy::module_inception)]
-mod show_commit;
 mod util;
 
-pub use self::show_commit::ShowCommit;
+use crate::commit::Commit;
+use crate::display::display_color::DisplayColor;
+use crate::git_interactive::GitInteractive;
+use crate::input::input_handler::InputHandler;
+use crate::input::Input;
+use crate::process::handle_input_result::{HandleInputResult, HandleInputResultBuilder};
+use crate::process::process_module::ProcessModule;
+use crate::process::process_result::{ProcessResult, ProcessResultBuilder};
+use crate::process::state::State;
+use crate::scroll::scroll_position::ScrollPosition;
+use crate::show_commit::data::Data;
+use crate::view::View;
+
+pub(crate) struct ShowCommit {
+	commit: Option<Result<Commit, String>>,
+	data: Data,
+	scroll_position: ScrollPosition,
+}
+
+impl ProcessModule for ShowCommit {
+	fn activate(&mut self, _state: State, git_interactive: &GitInteractive) {
+		self.scroll_position.reset();
+		self.commit = Some(git_interactive.load_commit_stats());
+	}
+
+	fn deactivate(&mut self) {
+		self.data.reset();
+	}
+
+	fn process(&mut self, _git_interactive: &mut GitInteractive, view: &View) -> ProcessResult {
+		let (view_width, view_height) = view.get_view_size();
+		let mut result = ProcessResultBuilder::new();
+
+		if let Some(commit) = &self.commit {
+			match commit {
+				Ok(c) => self.data.update(&c, view_width, view_height),
+				Err(e) => {
+					result = result.error(e.as_str(), State::List(false));
+					self.data.reset()
+				},
+			}
+		}
+
+		result.build()
+	}
+
+	fn handle_input(
+		&mut self,
+		input_handler: &InputHandler,
+		_git_interactive: &mut GitInteractive,
+		view: &View,
+	) -> HandleInputResult
+	{
+		let (view_width, view_height) = view.get_view_size();
+
+		let input = input_handler.get_input();
+		let mut result = HandleInputResultBuilder::new(input);
+		match input {
+			Input::MoveCursorLeft => {
+				self.scroll_position
+					.scroll_left(view_width, self.get_max_line_length(view_height))
+			},
+			Input::MoveCursorRight => {
+				self.scroll_position
+					.scroll_right(view_width, self.get_max_line_length(view_height))
+			},
+			Input::MoveCursorDown => {
+				self.scroll_position
+					.scroll_down(view_height, self.get_commit_stats_length())
+			},
+			Input::MoveCursorUp => {
+				self.scroll_position
+					.scroll_up(view_height, self.get_commit_stats_length())
+			},
+			Input::Resize => {
+				self.scroll_position
+					.scroll_up(view_height, self.get_commit_stats_length());
+			},
+			_ => {
+				result = result.state(State::List(false));
+			},
+		}
+		result.build()
+	}
+
+	fn render(&self, view: &View, _git_interactive: &GitInteractive) {
+		let (_, window_height) = view.get_view_size();
+		let view_height = window_height - 2;
+
+		view.draw_title(false);
+
+		match &self.commit {
+			None => {
+				view.draw_error("Not commit data to show");
+				return;
+			},
+			Some(c) => c.as_ref().unwrap(), // safe unwrap
+		};
+
+		view.draw_view_lines(
+			self.data.get_lines(),
+			self.scroll_position.get_top_position(),
+			self.scroll_position.get_left_position(),
+			view_height,
+		);
+
+		view.set_color(DisplayColor::IndicatorColor, false);
+		view.draw_str("Any key to close");
+	}
+}
+
+impl ShowCommit {
+	pub(crate) fn new() -> Self {
+		Self {
+			commit: None,
+			data: Data::new(),
+			scroll_position: ScrollPosition::new(3, 6, 3),
+		}
+	}
+
+	fn get_commit_stats_length(&self) -> usize {
+		if let Some(commit) = &self.commit {
+			if let Ok(c) = commit {
+				let mut len = c.get_file_stats_length();
+
+				match c.get_body() {
+					Some(b) => {
+						len += b.lines().count();
+					},
+					None => {},
+				}
+				return len + 3; // author + date + commit hash
+			}
+		}
+		0
+	}
+
+	fn get_max_line_length(&self, view_height: usize) -> usize {
+		self.data.get_max_line_length(
+			self.scroll_position.get_top_position(),
+			self.scroll_position.get_top_position() + view_height,
+		)
+	}
+}