From 79bd22a704f5b8a37ff74baeb085625bdb42392c Mon Sep 17 00:00:00 2001
From: Guocork <114151398+Guocork@users.noreply.github.com>
Date: Thu, 24 Oct 2024 15:51:12 +0800
Subject: [PATCH] Use relative date formatting in chat history (#286)

---
 src/chat/chat_history_card.rs | 36 ++++++++++++++++++++++++++++++++---
 1 file changed, 33 insertions(+), 3 deletions(-)

diff --git a/src/chat/chat_history_card.rs b/src/chat/chat_history_card.rs
index 7fe91658..98831abd 100644
--- a/src/chat/chat_history_card.rs
+++ b/src/chat/chat_history_card.rs
@@ -2,7 +2,7 @@ use crate::{
     data::{chats::chat::ChatID, store::Store},
     shared::modal::ModalWidgetExt,
 };
-use chrono::{DateTime, Local, TimeZone};
+use chrono::{DateTime, Duration, Local, TimeZone};
 
 use makepad_widgets::*;
 
@@ -295,9 +295,10 @@ impl Widget for ChatHistoryCard {
         let datetime =
             DateTime::from_timestamp_millis(chat.borrow().id as i64).expect("Invalid timestamp");
         let local_datetime: DateTime<Local> = Local.from_utc_datetime(&datetime.naive_utc());
-        let formatted_date = local_datetime.format("%-I:%M %p, %-d/%m/%y").to_string();
+        if let Some(formatted_date) = relative_format(local_datetime) { 
+            date_label.set_text(&formatted_date);
+        }
 
-        date_label.set_text(&formatted_date);
 
         self.view.draw_walk(cx, scope, walk)
     }
@@ -499,3 +500,32 @@ pub enum ChatHistoryCardAction {
     MenuClosed(ChatID),
     DeleteChatOptionSelected(ChatID),
 }
+
+
+fn relative_format(datetime: DateTime<Local>) -> Option<String> {
+    
+    // Calculate the time difference between now and the given timestamp
+    let now = Local::now();
+    let duration = now - datetime;
+
+    // Handle different time ranges and format accordingly
+    if duration < Duration::seconds(60) {
+        Some("Now".to_string())
+    } else if duration < Duration::minutes(60) {
+        let minutes_text = if duration.num_minutes() == 1 { "min" } else { "mins" };
+        Some(format!("{} {} ago", duration.num_minutes(), minutes_text))
+    } else if duration < Duration::hours(24) && now.date_naive() == datetime.date_naive() {
+        Some(format!("{}", datetime.format("%H:%M"))) // "HH:MM" format for today
+    } else if duration < Duration::hours(48) {
+        if let Some(yesterday) = now.date_naive().succ_opt() {
+            if yesterday == datetime.date_naive() {
+                return Some(format!("Yesterday at {}", datetime.format("%H:%M")));
+            }
+        }
+        Some(format!("{}", datetime.format("%A"))) // Fallback to day of the week if not yesterday
+    } else if duration < Duration::weeks(1) {
+        Some(format!("{}", datetime.format("%A"))) // Day of the week (e.g., "Tuesday")
+    } else {
+        Some(format!("{}", datetime.format("%F"))) // "YYYY-MM-DD" format for older messages
+    }
+}