Update

src/data/exif.rs

@@ -6,27 +6,31 @@ use crate::exif::ExifTypeID;
 use crate::exif::ExifValue;
 use crate::ext::try_err::TryErr;
 use crate::parser::description::parse_description;
+use proc_macros::call_parent_data_source_fun;
+use proc_macros::define_exif_data_source;
 use std::convert::TryFrom;
 use std::ffi::OsStr;
 use utf16string::LittleEndian;
 use utf16string::WString;
 
 pub trait ExifDataSource {
-    fn image_author(&self) -> Option<String> {
-        None
-    }
+    define_exif_data_source!("src/data/exif_data_source.json");
+}
 
-    fn image_comment(&self) -> Option<String> {
-        None
-    }
+impl<T: ExifDataSource> ExifDataSource for std::sync::Arc<T> {
+    call_parent_data_source_fun!("src/data/exif_data_source.json", *self,);
+}
 
-    fn image_id(&self) -> Option<String> {
-        None
-    }
-
-    fn image_title(&self) -> Option<String> {
-        None
-    }
+impl<T: ExifDataSource> ExifDataSource for Option<T> {
+    call_parent_data_source_fun!(
+        "src/data/exif_data_source.json",
+        match self {
+            Some(data) => data,
+            None => {
+                return None;
+            }
+        },
+    );
 }
 
 fn add_image_id<D: ExifDataSource>(data: &mut ExifData, d: &D) -> Result<(), ()> {

src/data/exif_data_source.json

@@ -0,0 +1,6 @@
+{
+    "image_author": { "return": "String", "description": "The author of the image." },
+    "image_comment": { "return": "String", "description": "The comment of the image." },
+    "image_id": { "return": "String", "description": "The image id." },
+    "image_title": { "return": "String", "description": "The title of the image." }
+}

src/data/fanbox.rs

@@ -1,12 +1,18 @@
+#[cfg(feature = "exif")]
+use super::exif::ExifDataSource;
 use crate::fanbox::post::FanboxPost;
 use crate::pixiv_link::PixivID;
 use crate::pixiv_link::ToPixivID;
 use json::JsonValue;
+#[cfg(feature = "exif")]
+use proc_macros::call_parent_data_source_fun;
 
 pub struct FanboxData {
     pub id: PixivID,
     /// Raw data
     pub raw: JsonValue,
+    #[cfg(feature = "exif")]
+    pub exif_data: Option<Box<dyn ExifDataSource>>,
 }
 
 impl FanboxData {
@@ -15,8 +21,28 @@ impl FanboxData {
             Some(id) => Some(Self {
                 id,
                 raw: post.get_json().clone(),
+                #[cfg(feature = "exif")]
+                exif_data: None,
             }),
             None => None,
         }
     }
 }
+
+#[cfg(feature = "exif")]
+impl ExifDataSource for FanboxData {
+    call_parent_data_source_fun!(
+        "src/data/exif_data_source.json",
+        match &self.exif_data {
+            Some(d) => d,
+            None => {
+                return None;
+            }
+        },
+        image_id,
+    );
+
+    fn image_id(&self) -> Option<String> {
+        Some(self.id.to_link())
+    }
+}