feat: repository architecture for files crate w. added tests (#498)

crates/core/files/src/repositories/encryption_repository.rs

@@ -0,0 +1,6 @@
+use anyhow::Result;
+
+pub trait EncryptionRepository: Send + Sync + 'static {
+    fn decrypt_buffer(&self, buf: Vec<u8>, iv: &str) -> anyhow::Result<Vec<u8>>;
+    fn encrypt_buffer(&self, buf: &[u8]) -> Result<(Vec<u8>, String)>;
+}

crates/core/files/src/repositories/file_storage_repository.rs

@@ -0,0 +1,22 @@
+use anyhow::Result;
+
+#[async_trait::async_trait]
+pub trait FileStorageRepository: Send + Sync + 'static {
+    async fn create_bucket(&self, bucket_id: &str) -> anyhow::Result<()>;
+
+    async fn fetch_and_decrypt_file(
+        &self,
+        bucket_id: &str,
+        path: &str,
+        iv: &str,
+    ) -> Result<Vec<u8>>;
+
+    async fn encrypt_and_upload_file(
+        &self,
+        bucket_id: &str,
+        path: &str,
+        buf: &[u8],
+    ) -> Result<String>;
+
+    async fn delete_file(&self, bucket_id: &str, path: &str) -> Result<()>;
+}

crates/core/files/src/repositories/media_repository.rs

@@ -0,0 +1,30 @@
+use anyhow::Result;
+use image::DynamicImage;
+use std::io::{BufRead, Read, Seek};
+use tempfile::NamedTempFile;
+use thiserror::Error;
+
+pub trait MediaRepository: Send + Sync + 'static {
+    fn image_size(&self, f: &NamedTempFile) -> Option<(usize, usize)>;
+    fn image_size_vec(&self, v: &[u8], mime: &str) -> Option<(usize, usize)>;
+
+    fn decode_image<R: Read + BufRead + Seek>(
+        &self,
+        reader: &mut R,
+        mime: &str,
+    ) -> Result<DynamicImage, MediaError>;
+
+    fn is_valid_image<R: Read + BufRead + Seek>(&self, reader: &mut R, mime: &str) -> bool;
+
+    fn create_thumbnail(&self, image: DynamicImage, tag: &str) -> Vec<u8>;
+
+    fn video_size(&self, f: &NamedTempFile) -> Option<(i64, i64)>;
+}
+
+#[derive(Debug, Error)]
+pub enum MediaError {
+    #[error("image processing failed because {cause}")]
+    ImageProcessingFailed { cause: String },
+    #[error(transparent)]
+    Unknown(#[from] anyhow::Error),
+}

crates/core/files/src/repositories/mod.rs

@@ -0,0 +1,7 @@
+mod encryption_repository;
+mod file_storage_repository;
+mod media_repository;
+
+pub use encryption_repository::EncryptionRepository;
+pub use file_storage_repository::FileStorageRepository;
+pub use media_repository::{MediaError, MediaRepository};