Generate images directly from the program

Cargo.toml

@@ -8,5 +8,11 @@ name = "jardiflore"
 path = "main.rs"
 
 [dependencies]
+ab_glyph = "0.2.29"
 calamine = "0.26.1"
+chrono = "0.4.40"
+image = "0.25.6"
+imageproc = "0.25.0"
 serde = "1.0.217"
+small_uid = "0.2.4"
+structopt = "0.3.26"

main.rs

@@ -1,5 +1,40 @@
 use calamine::{open_workbook, Data, Reader, Xlsx};
 
+use structopt::StructOpt;
+
+use ab_glyph::{FontRef, PxScale};
+use image::{ImageBuffer, Rgba};
+use imageproc::drawing::draw_text_mut;
+use small_uid::SmallUid;
+use std::path::{Path, PathBuf};
+
+// Configuration for the label
+const DPI: f32 = 300.0;
+const MM_TO_PX: f32 = DPI / 25.4;
+const LABEL_WIDTH: f32 = 210.0 * MM_TO_PX;
+const LABEL_HEIGHT: f32 = 20.0 * MM_TO_PX;
+
+// Elements positionning
+const LOGO_WIDTH: u32 = 151;
+const LOGO_HEIGHT: u32 = 64;
+const LOGO_POS_X: u32 = LABEL_WIDTH as u32 - LOGO_WIDTH - 10;
+const LOGO_POS_Y: u32 = 10;
+
+const CLIENT_CODE_POS_X: i32 = 10;
+const CLIENT_CODE_POS_Y: i32 = 10;
+const CLIENT_CODE_SCALE: f32 = 24.0;
+
+const DATE_POS_X: i32 = 10;
+const DATE_POS_Y: i32 = 40;
+const DATE_SCALE: f32 = 32.0;
+
+const SPECIES_VARIETY_POS_X: i32 = 10;
+const SPECIES_VARIETY_POS_Y: i32 = 80;
+const SPECIES_VARIETY_SCALE: f32 = 24.0;
+
+const COLOR_TEXT: Rgba<u8> = Rgba([0, 0, 0, 255]);
+const COLOR_BACKGROUND: Rgba<u8> = Rgba([255, 255, 255, 255]);
+
 #[derive(Debug, Clone)]
 struct Record {
     client_code: String,
@@ -62,10 +97,102 @@ fn parse_xlsx(delivery_week_filter: &str) -> Result<Vec<Record>, Box<dyn std::er
     Ok(records)
 }
 
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let records = parse_xlsx("s06")?;
-    for record in records {
-        println!("{:?}", record);
+// The label looks like this:
+//
+//  Tomate (Solanum lycopersicum) (species)                                             /^\
+//  Variété: San Marzano (variety)                                                     / j \
+//                                                                                    / ard \
+//                                                                                   / iflore\
+//                                                                                   ---------
+// SEMAINE DE LIVRAISON: 22
+//
+//                                                                       123 Allée des Récoltes
+//                                                                       Tél: Téléphone.
+//
+fn generate_label(output_dir: &String, record: Record) -> PathBuf {
+    let font_data = include_bytes!("./assets/DejaVuSans.ttf");
+    let font = FontRef::try_from_slice(font_data).unwrap();
+    let logo = image::open("./assets/logo.png").unwrap();
+
+    let mut label = ImageBuffer::new(LABEL_WIDTH as u32, LABEL_HEIGHT as u32);
+
+    // Fill in the background
+    for pixel in label.pixels_mut() {
+        *pixel = COLOR_BACKGROUND;
     }
+
+    // Logo
+    let resized_logo = image::imageops::resize(
+        &logo,
+        LOGO_WIDTH,
+        LOGO_HEIGHT,
+        image::imageops::FilterType::Lanczos3,
+    );
+
+    image::imageops::overlay(
+        &mut label,
+        &resized_logo,
+        LOGO_POS_X as i64,
+        LOGO_POS_Y as i64,
+    );
+
+    draw_text_mut(
+        &mut label,
+        COLOR_TEXT,
+        CLIENT_CODE_POS_X,
+        CLIENT_CODE_POS_Y,
+        PxScale::from(CLIENT_CODE_SCALE),
+        &font,
+        &record.client_code,
+    );
+
+    draw_text_mut(
+        &mut label,
+        COLOR_TEXT,
+        DATE_POS_X,
+        DATE_POS_Y,
+        PxScale::from(DATE_SCALE),
+        &font,
+        &record.delivery_week,
+    );
+
+    let species_varieties: String = "".to_owned() + &record.species + " " + &record.variety;
+    draw_text_mut(
+        &mut label,
+        COLOR_TEXT,
+        SPECIES_VARIETY_POS_X,
+        SPECIES_VARIETY_POS_Y,
+        PxScale::from(SPECIES_VARIETY_SCALE),
+        &font,
+        &species_varieties,
+    );
+
+    // Save the label
+
+    let output_path = Path::new(output_dir).join(format!("label_{}.png", SmallUid::new()));
+    label.save(output_path.clone()).unwrap();
+
+    return output_path;
+}
+
+#[derive(StructOpt)]
+struct Opts {
+    #[structopt(short = "o", long, default_value = "output")]
+    output_dir: String,
+    #[structopt(short = "w", long, default_value = "06")]
+    week: String,
+}
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let opts = Opts::from_args();
+    std::fs::create_dir_all(&opts.output_dir).unwrap();
+
+    let week_number = "s".to_owned() + &opts.week;
+    let records = parse_xlsx(&week_number)?;
+
+    for record in records {
+        let path = generate_label(&opts.output_dir, record);
+        println!("{}", path.into_os_string().into_string().unwrap())
+    }
+
     Ok(())
 }