log trace

src/logline.rs

@@ -1,6 +1,8 @@
 use ahash::AHasher;
 use logsmash_data::LogLevel;
 use serde::Deserialize;
+use serde_json::Value;
+use std::fmt::{Display, Formatter};
 use std::hash::{Hash, Hasher};
 use time::OffsetDateTime;
 use tinystr::TinyAsciiStr;
@@ -73,3 +75,105 @@ impl Hash for Exception {
         self.line.hash(state);
     }
 }
+
+#[derive(Deserialize, Clone)]
+pub struct FullLogLine {
+    #[serde(rename = "reqId")]
+    pub request_id: TinyAsciiStr<32>,
+    pub level: LogLevel,
+    #[serde(with = "time::serde::iso8601")]
+    pub time: OffsetDateTime,
+    #[serde(rename = "remoteAddr")]
+    pub remote_address: String,
+    pub user: String,
+    pub app: TinyAsciiStr<32>,
+    pub method: TinyAsciiStr<16>,
+    pub url: String,
+    pub message: String,
+    #[serde(rename = "userAgent")]
+    pub user_agent: String,
+    pub version: TinyAsciiStr<16>,
+    pub exception: Option<FullException>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+#[serde(rename_all = "PascalCase")]
+pub struct FullException {
+    pub exception: String,
+    pub message: String,
+    pub code: ExceptionCode,
+    pub trace: Vec<Trace>,
+    pub file: String,
+    pub line: usize,
+    pub previous: Option<Box<FullException>>,
+}
+
+#[derive(Deserialize, Debug, Clone)]
+#[serde(untagged)]
+pub enum ExceptionCode {
+    Num(isize),
+    String(String),
+}
+
+impl FullException {
+    pub fn stack(&self) -> impl Iterator<Item = &FullException> + '_ {
+        ExceptionStack {
+            exception: Some(self),
+        }
+    }
+}
+
+#[derive(Deserialize, Debug, Clone)]
+pub struct Trace {
+    #[serde(default)]
+    pub file: String,
+    #[serde(default)]
+    pub line: usize,
+    #[serde(default)]
+    pub function: String,
+    #[serde(default)]
+    pub class: String,
+    #[serde(default, rename = "type")]
+    pub ty: Option<TinyAsciiStr<4>>,
+    #[serde(default)]
+    pub args: Vec<Value>,
+}
+
+impl Trace {
+    pub fn function(&self) -> impl Display + '_ {
+        TraceFunction {
+            function: self.function.as_str(),
+            class: self.class.as_str(),
+            ty: self.ty.as_deref(),
+        }
+    }
+}
+
+struct TraceFunction<'a> {
+    function: &'a str,
+    class: &'a str,
+    ty: Option<&'a str>,
+}
+
+impl Display for TraceFunction<'_> {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self.ty {
+            Some(ty) => write!(f, "{}{}{}", self.class, ty, self.function),
+            _ => write!(f, "{}", self.function),
+        }
+    }
+}
+
+struct ExceptionStack<'a> {
+    exception: Option<&'a FullException>,
+}
+
+impl<'a> Iterator for ExceptionStack<'a> {
+    type Item = &'a FullException;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let current = self.exception?;
+        self.exception = current.previous.as_deref();
+        Some(current)
+    }
+}

src/ui/mod.rs

@@ -170,8 +170,14 @@ fn ui(frame: &mut Frame, app: &App, state: &mut UiState) {
             );
             frame.render_widget(footer(app, page), layout[2]);
         }
-        UiState::Log(LogState { log, .. }) => {
-            frame.render_widget(single_log(app, log), layout[0].union(layout[1]));
+        UiState::Log(LogState {
+            log, table_state, ..
+        }) => {
+            frame.render_stateful_widget(
+                single_log(app, log),
+                layout[0].union(layout[1]),
+                table_state,
+            );
             frame.render_widget(footer(app, page), layout[2]);
         }
     }

src/ui/single_log.rs

@@ -1,7 +1,98 @@
 use crate::app::App;
-use crate::logline::LogLine;
-use ratatui::widgets::{Paragraph, Wrap};
+use crate::logline::{FullException, FullLogLine, LogLine, Trace};
+use crate::ui::style::{TABLE_HEADER_STYLE, TABLE_SELECTED_STYLE, TIME_FORMAT};
+use ratatui::prelude::*;
+use ratatui::widgets::{Cell, HighlightSpacing, Paragraph, Row, Table, TableState, Wrap};
+use std::iter::once;
+use time::format_description::well_known::Iso8601;
 
-pub fn single_log<'a>(_app: &App, line: &'a LogLine) -> Paragraph<'a> {
-    Paragraph::new(line.display()).wrap(Wrap::default())
+pub fn single_log(app: &App, line: &LogLine) -> SingleLog {
+    let raw_line = app.get_line(line.index).unwrap();
+    let line: FullLogLine = serde_json::from_str(raw_line).unwrap();
+    SingleLog { line }
+}
+
+pub struct SingleLog {
+    line: FullLogLine,
+}
+
+impl StatefulWidget for SingleLog {
+    type State = TableState;
+
+    fn render(self, area: Rect, buf: &mut Buffer, state: &mut Self::State)
+    where
+        Self: Sized,
+    {
+        let par = Paragraph::new(format!(
+            "{}\n\n  {} {}\n  {}\n\n  from {} by {} at {}",
+            self.line.message,
+            self.line.method,
+            self.line.url,
+            self.line.user_agent,
+            self.line.remote_address,
+            self.line.user,
+            self.line.time.format(&Iso8601::<TIME_FORMAT>).unwrap()
+        ))
+        .wrap(Wrap::default());
+
+        let layout = Layout::default()
+            .direction(Direction::Vertical)
+            .constraints(vec![Constraint::Min(7), Constraint::Percentage(100)])
+            .split(area);
+
+        par.render(layout[0], buf);
+
+        if let Some(exception) = &self.line.exception {
+            StatefulWidget::render(render_exception(exception), layout[1], buf, state);
+        }
+    }
+}
+
+pub fn render_exception(exception: &FullException) -> Table {
+    let header = [
+        Text::from("File"),
+        Text::from("Line").alignment(Alignment::Right),
+        Text::from("Function"),
+    ]
+    .into_iter()
+    .map(Cell::from)
+    .collect::<Row>()
+    .style(TABLE_HEADER_STYLE)
+    .height(1);
+
+    let widths = [
+        Constraint::Percentage(40),
+        Constraint::Min(10),
+        Constraint::Percentage(60),
+    ];
+    let rows = exception.stack().flat_map(exception_trace);
+    let table = Table::new(rows, widths)
+        .header(header)
+        .highlight_style(TABLE_SELECTED_STYLE)
+        .highlight_spacing(HighlightSpacing::Always);
+    table
+}
+
+fn exception_trace(exception: &FullException) -> impl Iterator<Item = Row> + '_ {
+    let exception_row = Row::new([
+        Text::from(""),
+        Text::from(exception.line.to_string()).alignment(Alignment::Right),
+        Text::from(exception.file.clone()),
+    ])
+    .style(TABLE_HEADER_STYLE);
+    let trace_rows = exception.trace.iter().map(trace_line);
+    once(exception_row).chain(trace_rows)
+}
+
+fn trace_line(trace: &Trace) -> Row {
+    Row::new([
+        Text::from(trace.file.clone()),
+        Text::from(if trace.line > 0 {
+            trace.line.to_string()
+        } else {
+            String::new()
+        })
+        .alignment(Alignment::Right),
+        Text::from(trace.function().to_string()),
+    ])
 }

src/ui/state.rs

@@ -1,6 +1,6 @@
 use crate::app::{App, LogMatch};
 use crate::copy_osc;
-use crate::logline::LogLine;
+use crate::logline::{FullLogLine, LogLine};
 use derive_more::From;
 use ratatui::widgets::{ScrollbarState, TableState};
 use table_state::TableStateExt;
@@ -56,7 +56,10 @@ impl<'a> LogsState<'a> {
 
 #[derive(Clone)]
 pub struct LogState<'a> {
+    pub trace_len: usize,
     pub log: &'a LogLine,
+    pub full_line: FullLogLine,
+    pub table_state: TableState,
     pub previous: Box<UiState<'a>>,
 }
 
@@ -84,6 +87,7 @@ impl<'a> UiState<'a> {
             UiState::MatchList(state) => Some(&mut state.table_state),
             UiState::Match(state) => Some(&mut state.table_state),
             UiState::Logs(state) => Some(&mut state.table_state),
+            UiState::Log(state) => Some(&mut state.table_state),
             _ => None,
         }
     }
@@ -102,6 +106,7 @@ impl<'a> UiState<'a> {
             UiState::MatchList(_) => app.match_lines(),
             UiState::Match(state) => state.result.grouped.len(),
             UiState::Logs(state) => state.lines.len(),
+            UiState::Log(state) => state.trace_len,
             _ => 0,
         }
     }
@@ -115,18 +120,20 @@ impl<'a> UiState<'a> {
                 let count = state.row_count(app);
                 if let Some(table_state) = state.table_state() {
                     let pos = table_state.down(count, step);
-                    let scroll_state = state.scroll_state().unwrap();
+                    if let Some(scroll_state) = state.scroll_state() {
                         *scroll_state = scroll_state.position(pos);
                     }
+                }
                 state
             }
             (mut state, UiEvent::Up(step)) => {
                 let count = state.row_count(app);
                 if let Some(table_state) = state.table_state() {
                     let pos = table_state.up(count, step);
-                    let scroll_state = state.scroll_state().unwrap();
+                    if let Some(scroll_state) = state.scroll_state() {
                         *scroll_state = scroll_state.position(pos);
                     }
+                }
                 state
             }
             (UiState::MatchList(state), UiEvent::Select) => {
@@ -168,8 +175,18 @@ impl<'a> UiState<'a> {
 
                 let line = state.lines[selected];
                 let log = &app.lines[line];
+                let raw_line = app.get_line(log.index).unwrap();
+                let full_line: FullLogLine = serde_json::from_str(raw_line).unwrap();
+                let trace_len = if let Some(exception) = &full_line.exception {
+                    exception.stack().map(|e| 1 + e.trace.len()).sum()
+                } else {
+                    0
+                };
                 UiState::Log(LogState {
                     log,
+                    full_line,
+                    trace_len,
+                    table_state,
                     previous: Box::new(state.into()),
                 })
             }