initial commit

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I4a6b498153eccd5407510dd541b7f4816a6a6964

crates/pinakes-core/src/metadata/mod.rs

@@ -0,0 +1,46 @@
+pub mod audio;
+pub mod document;
+pub mod image;
+pub mod markdown;
+pub mod video;
+
+use std::collections::HashMap;
+use std::path::Path;
+
+use crate::error::Result;
+use crate::media_type::MediaType;
+
+#[derive(Debug, Clone, Default)]
+pub struct ExtractedMetadata {
+    pub title: Option<String>,
+    pub artist: Option<String>,
+    pub album: Option<String>,
+    pub genre: Option<String>,
+    pub year: Option<i32>,
+    pub duration_secs: Option<f64>,
+    pub description: Option<String>,
+    pub extra: HashMap<String, String>,
+}
+
+pub trait MetadataExtractor: Send + Sync {
+    fn extract(&self, path: &Path) -> Result<ExtractedMetadata>;
+    fn supported_types(&self) -> &[MediaType];
+}
+
+pub fn extract_metadata(path: &Path, media_type: MediaType) -> Result<ExtractedMetadata> {
+    let extractors: Vec<Box<dyn MetadataExtractor>> = vec![
+        Box::new(audio::AudioExtractor),
+        Box::new(document::DocumentExtractor),
+        Box::new(video::VideoExtractor),
+        Box::new(markdown::MarkdownExtractor),
+        Box::new(image::ImageExtractor),
+    ];
+
+    for extractor in &extractors {
+        if extractor.supported_types().contains(&media_type) {
+            return extractor.extract(path);
+        }
+    }
+
+    Ok(ExtractedMetadata::default())
+}