Add squezer for extracting exif data

squeezer/src/main.rs

@@ -0,0 +1,62 @@
+use clap::Parser;
+use serde_json::{Map, Value};
+use std::path::PathBuf;
+
+fn map_to_value(tag: exif::Tag, value: exif::Value) -> Value {
+    if let Some(n) = value.get_uint(0) {
+        return Value::Number(n.into());
+    }
+    if let exif::Value::Rational(rs) = value {
+        return serde_json::json!({
+            "num": Value::Number(rs[0].num.into()),
+            "denom": Value::Number(rs[0].denom.into()),
+        });
+    }
+    Value::String(value.display_as(tag).to_string())
+}
+
+fn extract_exif_data(image_path: &PathBuf) -> Value {
+    let image_file = std::fs::File::open(image_path).unwrap();
+    let mut reader = std::io::BufReader::new(image_file);
+    let exifreader = exif::Reader::new();
+    let exif = exifreader.read_from_container(&mut reader).unwrap();
+
+    let mut exif_data = Map::new();
+    for f in exif.fields() {
+        let t = format!("{}", f.tag);
+        exif_data.insert(t, map_to_value(f.tag, f.value.clone()));
+    }
+    Value::Object(exif_data)
+}
+
+#[derive(Debug)]
+#[derive(Parser)]
+struct Cli {
+    image_path: PathBuf,
+    #[arg(long)]
+    root: PathBuf,
+    #[arg(long)]
+    dist_path: PathBuf,
+    #[arg(long)]
+    key: String,
+    #[arg(long)]
+    thumbnail: PathBuf,
+}
+
+fn main() {
+    let cli = Cli::parse();
+
+    let exif_data = extract_exif_data(&cli.image_path);
+
+    let metadata = serde_json::json!({
+        "exif": exif_data,
+        "path": {
+            "name": cli.image_path.file_name().unwrap().to_str(),
+            "relativeToRoot": cli.image_path.strip_prefix(&cli.root).unwrap(),
+            "distRelativeToRoot": cli.dist_path.strip_prefix(&cli.root).unwrap(),
+            "thumbnailRelativeToRoot": cli.thumbnail.strip_prefix(&cli.root).unwrap(),
+        },
+        "key": cli.key,
+    });
+    println!("{}", metadata);
+}