Don't crash when no messages

src/main.rs

@@ -30,30 +30,6 @@ fn get_own_nick() -> String {
     std::env::var("USER").unwrap()
 }
 
-fn load_logs(jid: &str) -> gio::ListStore {
-    let logs = {
-        let mut file = std::fs::File::open(jid).unwrap();
-        let mut string = String::new();
-        use std::io::Read;
-        file.read_to_string(&mut string).unwrap();
-        string
-    };
-    let (_, logs) = poezio_logs::parse_logs(&logs).unwrap();
-    let store = gio::ListStore::new::<Message>();
-    for item in logs {
-        if let poezio_logs::Item::Message(message) = item {
-            use poezio_logs::LogItem;
-            let message = Message::new(
-                message.get_time(),
-                message.get_nick(),
-                &message.get_message(),
-            );
-            store.append(&message);
-        }
-    }
-    store
-}
-
 fn xep_0392(input: &str) -> String {
     use sha1::Digest;
     let sha1 = sha1::Sha1::digest(input);
@@ -157,7 +133,7 @@ fn main() {
                 let item = tabs_selection.selected_item().unwrap();
                 let tab: &Tab = item.downcast_ref().unwrap();
                 println!("Switching to {}", tab.jid());
-                let store = load_logs(&tab.jid());
+                let store = poezio_logs::load_logs(&tab.jid());
                 let selection = win2.selection();
                 selection.set_model(Some(&store));
                 win2.messages().scroll_to(

src/poezio_logs.rs

@@ -14,6 +14,7 @@
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 use chrono::{DateTime, TimeZone, Utc};
+use gtk::gio;
 use nom;
 use nom::{
     bytes::complete::{tag, take, take_until},
@@ -22,8 +23,13 @@ use nom::{
     sequence::tuple,
     IResult,
 };
+
+use std::fs::read_to_string;
+use std::path::PathBuf;
 use std::str::FromStr;
 
+use crate::Message;
+
 pub trait LogItem {
     fn get_time(&self) -> &DateTime<Utc>;
     fn get_message(&self) -> String;
@@ -82,7 +88,12 @@ pub fn parse_datetime(i: &str) -> IResult<&str, DateTime<Utc>> {
         tag("Z"),
     ))(i)?;
     // TODO: handle DST and other time transitions
-    Ok((i, Utc.with_ymd_and_hms(year, month, day, hour, minute, second).single().unwrap()))
+    Ok((
+        i,
+        Utc.with_ymd_and_hms(year, month, day, hour, minute, second)
+            .single()
+            .unwrap(),
+    ))
 }
 
 pub fn parse_log_info(i: &str) -> IResult<&str, LogInfo> {
@@ -143,6 +154,30 @@ pub enum Item<'a> {
     Info(LogInfo<'a>),
 }
 
+pub fn load_logs(jid: &str) -> gio::ListStore {
+    let xdg_data = std::env::var("XDG_DATA_HOME").unwrap_or(format!(
+        "{}/.local/share",
+        std::env::var("HOME").expect("NO $HOME?!")
+    ));
+    let xdg_data = PathBuf::from(xdg_data);
+    let entry = xdg_data.join("poezio/logs").join(jid);
+
+    let logs = read_to_string(entry).unwrap_or("".to_string());
+    let (_, logs) = parse_logs(&logs).unwrap();
+    let store = gio::ListStore::new::<Message>();
+    for item in logs {
+        if let Item::Message(message) = item {
+            let message = Message::new(
+                message.get_time(),
+                message.get_nick(),
+                &message.get_message(),
+            );
+            store.append(&message);
+        }
+    }
+    store
+}
+
 pub fn parse_logs(mut logs: &str) -> IResult<&str, Vec<Item>> {
     let mut items = vec![];
     loop {