feat: Add import_vcard() (#5202)

Add a function importing contacts from the given vCard.

deltachat-jsonrpc/src/api.rs

@@ -1447,7 +1447,7 @@ impl CommandApi {
 
     /// Parses a vCard file located at the given path. Returns contacts in their original order.
     async fn parse_vcard(&self, path: String) -> Result<Vec<VcardContact>> {
-        let vcard = tokio::fs::read(Path::new(&path)).await?;
+        let vcard = fs::read(Path::new(&path)).await?;
         let vcard = str::from_utf8(&vcard)?;
         Ok(deltachat_contact_tools::parse_vcard(vcard)
             .into_iter()
@@ -1455,6 +1455,20 @@ impl CommandApi {
             .collect())
     }
 
+    /// Imports contacts from a vCard file located at the given path.
+    ///
+    /// Returns the ids of created/modified contacts in the order they appear in the vCard.
+    async fn import_vcard(&self, account_id: u32, path: String) -> Result<Vec<u32>> {
+        let ctx = self.get_context(account_id).await?;
+        let vcard = tokio::fs::read(Path::new(&path)).await?;
+        let vcard = str::from_utf8(&vcard)?;
+        Ok(deltachat::contact::import_vcard(&ctx, vcard)
+            .await?
+            .into_iter()
+            .map(|c| c.to_u32())
+            .collect())
+    }
+
     /// Returns a vCard containing contacts with the given ids.
     async fn make_vcard(&self, account_id: u32, contacts: Vec<u32>) -> Result<String> {
         let ctx = self.get_context(account_id).await?;