Added current period indicator and update time to the layout

src/main.rs

@@ -1,7 +1,7 @@
 use std::borrow::Cow;
 use std::str::FromStr;
 
-use chrono::{format::Fixed, Datelike, Days, NaiveTime};
+use chrono::{format::Fixed, DateTime, Datelike, Days, FixedOffset, NaiveTime};
 use embedded_graphics::{
     mono_font::{MonoTextStyle, MonoTextStyleBuilder},
     prelude::{Dimensions, Point},
@@ -24,7 +24,7 @@ use esp_idf_svc::{
 };
 use u8g2_fonts::U8g2TextStyle;
 use untis::{Date, Lesson};
-use embedded_layout::{layout::linear::{FixedMargin, LinearLayout}, prelude::*};
+use embedded_layout::{layout::linear::{spacing::DistributeFill, ElementSpacing, FixedMargin, LinearLayout}, prelude::*};
 
 type Timetable = [[Option<Lesson>;8]; 5];
 
@@ -113,9 +113,9 @@ fn main() -> anyhow::Result<()> {
         ..Default::default()
     })?;
 
-    let tt = fetch_timetable(httpconnection);
+    let (tt, now) = fetch_timetable(httpconnection);
 
-    draw_layout(&mut display, &tt);
+    draw_layout(&mut display, &tt, now);
     //draw_text(&mut display, &tt[3][5].clone().unwrap().subjects.first().as_ref().unwrap().name, 5, 5);
     epd7in5.update_and_display_frame(&mut spi, &*display.buffer(), &mut delay)?;
     epd7in5.sleep(&mut spi, &mut delay)?;
@@ -124,34 +124,37 @@ fn main() -> anyhow::Result<()> {
    Ok(())
 }
 
-fn draw_text(display: &mut epd_waveshare::epd7in5_v2::Display7in5, text: &str, x: i32, y: i32) {
-    let style = MonoTextStyleBuilder::new()
-        .font(&embedded_graphics::mono_font::ascii::FONT_10X20)
-        .text_color(Color::White)
-        .background_color(Color::Black)
-        .build();
-
-    let text_style = TextStyleBuilder::new().baseline(Baseline::Top).build();
-
-    let _ = Text::with_text_style(text, Point::new(x, y), style, text_style).draw(display);
-}
-
-fn draw_layout(display: &mut epd_waveshare::epd7in5_v2::Display7in5, timetable: &Timetable){
+fn draw_layout(display: &mut epd_waveshare::epd7in5_v2::Display7in5, timetable: &Timetable, now: DateTime<FixedOffset>){
     let display_area = display.bounding_box();
 
     let margin = FixedMargin(10);
     // let text_style = MonoTextStyle::new(&embedded_graphics::mono_font::ascii::FONT_10X20, Color::White);
     let text_style = U8g2TextStyle::new(u8g2_fonts::fonts::u8g2_font_inr21_mf, Color::White);
+
+    let mut inverted_text_style = U8g2TextStyle::new(u8g2_fonts::fonts::u8g2_font_inr21_mf, Color::Black);
+    inverted_text_style.background_color = Some(Color::White);
+
+    let text_style_small = U8g2TextStyle::new(u8g2_fonts::fonts::u8g2_font_7x14_mr, Color::White);
+
     let empty_str = String::from(" ");
 
-    let mut texts = timetable.iter().map(|day| day.iter().map(|l| {
-        if let Some(l) = l{
+
+    let day_of_week = now.weekday().num_days_from_monday(); // zero-indexed
+    let current_period = get_school_period(now.time());
+
+    let mut texts = timetable.iter().enumerate().map(|(day_index, day)| day.iter().enumerate().map(|(period, l)| {
+        let s = if let Some(l) = l{
             Some(l.subjects.first().unwrap().name.as_str())
         }else{
             None
-        }
-    }).map(|s|{
-        Text::new(s.unwrap_or_else(|| &empty_str), Point::zero(), &text_style)
+        };
+        let text_style = if period as u8 == current_period && day_index as u32 == day_of_week{
+            &inverted_text_style
+        }else{
+            &text_style
+        };
+
+        Text::new(s.unwrap_or_else(|| &empty_str), Point::zero(), text_style)
     }).collect::<Vec<_>>()).collect::<Vec<_>>();
 
     let mut columns = texts.iter_mut().map(|day|
@@ -163,16 +166,44 @@ fn draw_layout(display: &mut epd_waveshare::epd7in5_v2::Display7in5, timetable:
 
     let columns = Views::new(&mut columns);
 
-    LinearLayout::horizontal(columns)
+    let time_str = format!("{}", now.format("%Y-%m-%d %H:%M"));
+    let time_text = Text::new(&time_str, Point::zero(), &text_style_small);
+
+    let time_table_grid = LinearLayout::horizontal(columns)
         .with_alignment(vertical::Center)
         .with_spacing(margin)
+        .arrange();
+
+    LinearLayout::vertical(Chain::new(time_table_grid).append(time_text))
+        .with_alignment(horizontal::Center)
+        .with_spacing(DistributeFill(display_area.size.height-20))
         .arrange()
-        .align_to(&display_area, horizontal::Center, vertical::Top)
+        .align_to(&display_area, horizontal::Center, vertical::Center)
         .draw(display)
         .unwrap();
 }
 
 
+fn get_school_period(time: NaiveTime) -> u8{
+    let lookup: [NaiveTime; 8] = [
+        (NaiveTime::from_hms_opt(8, 45, 0).unwrap()),
+        (NaiveTime::from_hms_opt(9, 35, 0).unwrap()),
+        (NaiveTime::from_hms_opt(10, 40, 0).unwrap()),
+        (NaiveTime::from_hms_opt(11, 30, 0).unwrap()),
+        (NaiveTime::from_hms_opt(12, 40, 0).unwrap()),
+        (NaiveTime::from_hms_opt(13, 30, 0).unwrap()),
+        (NaiveTime::from_hms_opt(14, 25, 0).unwrap()),
+        (NaiveTime::from_hms_opt(15, 15, 0).unwrap()),
+    ];
+
+    for (index, period_time) in lookup.iter().enumerate(){
+        if time < *period_time{
+            return index as u8;
+        }
+    }
+    7u8
+}
+
 
 fn transform_lessons(lessons: Vec<Lesson>) -> Box<Timetable>{
     let lookup: [NaiveTime; 8] = [
@@ -203,7 +234,7 @@ fn transform_lessons(lessons: Vec<Lesson>) -> Box<Timetable>{
 }
 
 
-fn fetch_timetable(client: EspHttpConnection) -> Box<Timetable> {
+fn fetch_timetable(client: EspHttpConnection) -> (Box<Timetable>, DateTime<FixedOffset>) {
     let mut creds = include_str!("../untis-creds.txt").split('\n');
 
     let server = creds.next().unwrap();
@@ -224,5 +255,5 @@ fn fetch_timetable(client: EspHttpConnection) -> Box<Timetable> {
     let date = now.date_naive().checked_add_days(Days::new(2)).unwrap();
     let lessons = s.own_timetable_for_week(&Date(date)).unwrap();
     
-    transform_lessons(lessons)
+    (transform_lessons(lessons), now)
 }