Check Exif DB for memory collection

src/database/mod.rs

@@ -4,7 +4,9 @@ use diesel::sqlite::SqliteConnection;
 use std::ops::DerefMut;
 use std::sync::{Arc, Mutex};
 
-use crate::database::models::{Favorite, ImageExif, InsertFavorite, InsertImageExif, InsertUser, User};
+use crate::database::models::{
+    Favorite, ImageExif, InsertFavorite, InsertImageExif, InsertUser, User,
+};
 
 pub mod models;
 pub mod schema;
@@ -91,7 +93,8 @@ impl UserDao for SqliteUserDao {
         !users
             .filter(username.eq(user))
             .load::<User>(&mut self.connection)
-            .unwrap_or_default().is_empty()
+            .unwrap_or_default()
+            .is_empty()
     }
 }
 
@@ -187,6 +190,7 @@ pub trait ExifDao: Sync + Send {
     fn get_exif(&mut self, file_path: &str) -> Result<Option<ImageExif>, DbError>;
     fn update_exif(&mut self, exif_data: InsertImageExif) -> Result<ImageExif, DbError>;
     fn delete_exif(&mut self, file_path: &str) -> Result<(), DbError>;
+    fn get_all_with_date_taken(&mut self) -> Result<Vec<(String, i64)>, DbError>;
 }
 
 pub struct SqliteExifDao {
@@ -273,4 +277,22 @@ impl ExifDao for SqliteExifDao {
             .map(|_| ())
             .map_err(|_| DbError::new(DbErrorKind::QueryError))
     }
+
+    fn get_all_with_date_taken(&mut self) -> Result<Vec<(String, i64)>, DbError> {
+        use schema::image_exif::dsl::*;
+
+        let mut connection = self.connection.lock().expect("Unable to get ExifDao");
+
+        image_exif
+            .select((file_path, date_taken))
+            .filter(date_taken.is_not_null())
+            .load::<(String, Option<i64>)>(connection.deref_mut())
+            .map(|records| {
+                records
+                    .into_iter()
+                    .filter_map(|(path, dt)| dt.map(|ts| (path, ts)))
+                    .collect()
+            })
+            .map_err(|_| DbError::new(DbErrorKind::QueryError))
+    }
 }