Add high level function to assign files to a page

Signed-off-by: trivernis <trivernis@protonmail.com>

src/wrapper/page.rs

@@ -1,4 +1,4 @@
-use crate::api_core::common::PageInformation;
+use crate::api_core::common::{FileIdentifier, PageInformation};
 use crate::error::Result;
 use crate::Client;
 
@@ -37,6 +37,31 @@ impl HydrusPage {
     pub fn id(&self) -> PageIdentifier {
         PageIdentifier::key(&self.key)
     }
+
+    /// Adds files to a page
+    pub async fn add_files(&self, files: Vec<FileIdentifier>) -> Result<()> {
+        let mut hashes = Vec::new();
+        let mut ids = Vec::new();
+
+        for file in files {
+            match file {
+                FileIdentifier::ID(id) => ids.push(id),
+                FileIdentifier::Hash(hash) => hashes.push(hash),
+            }
+        }
+        // resolve file ids to hashes
+        if ids.len() > 0 && hashes.len() > 0 {
+            while let Some(id) = ids.pop() {
+                let metadata = self
+                    .client
+                    .get_file_metadata_by_identifier(FileIdentifier::ID(id))
+                    .await?;
+                hashes.push(metadata.hash);
+            }
+        }
+
+        self.client.add_files_to_page(&self.key, ids, hashes).await
+    }
 }
 
 #[derive(Clone)]

tests/wrapper/test_page.rs

@@ -1,4 +1,5 @@
 use super::super::common;
+use hydrus_api::api_core::common::FileIdentifier;
 use hydrus_api::wrapper::page::HydrusPage;
 
 async fn get_page() -> HydrusPage {
@@ -30,3 +31,14 @@ async fn it_has_a_id() {
     let page = get_page().await;
     page.id();
 }
+
+#[tokio::test]
+async fn it_can_have_files_assigned() {
+    let page = get_page().await;
+    let result = page
+        .add_files(vec![FileIdentifier::hash(
+            "0000000000000000000000000000000000000000000000000000000000000000",
+        )])
+        .await;
+    assert!(result.is_err()) // root pages are not media pages
+}