chore: initial commit

src/app/document/file.rs

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: MPL-2.0 OR Apache-2.0
+// src/app/document/file.rs
+//
+// Opening files and dispatching to the correct concrete document type.
+
+use std::path::PathBuf;
+
+use anyhow::anyhow;
+
+use super::portable::PortableDocument;
+use super::raster::RasterDocument;
+use super::vector::VectorDocument;
+use super::{DocumentContent, DocumentKind};
+
+/// Open a document from a file path and dispatch to the correct type.
+///
+/// Raster formats are delegated to the `image` crate, which decides
+/// based on enabled codecs (e.g. default-formats).
+pub fn open_document(path: PathBuf) -> anyhow::Result<DocumentContent> {
+    let kind = DocumentKind::from_path(&path)
+        .ok_or_else(|| anyhow!("Unsupported document type: {:?}", path))?;
+
+    let content = match kind {
+        DocumentKind::Raster => {
+            let raster = RasterDocument::open(path)?;
+            DocumentContent::Raster(raster)
+        }
+        DocumentKind::Vector => {
+            let vector = VectorDocument::open(path)?;
+            DocumentContent::Vector(vector)
+        }
+        DocumentKind::Portable => {
+            let portable = PortableDocument::open(path)?;
+            DocumentContent::Portable(portable)
+        }
+    };
+
+    Ok(content)
+}