Cache contact info a short while

app/src/main/java/eu/faircode/email/AdapterMessage.java

@@ -495,7 +495,12 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         ivAvatar.setTag(message.id);
                         ivAvatar.setVisibility(View.INVISIBLE);
                         tvFrom.setTag(message.id);
+
                         Address[] addresses = (Address[]) args.getSerializable("addresses");
+                        ContactInfo info = ContactInfo.get(context, addresses, true);
+                        if (info != null && info.hasDisplayName())
+                            setFrom(info, addresses);
+                        else
                             tvFrom.setText(MessageHelper.formatAddresses(addresses, !compact, false));
                     }
 
@@ -503,7 +508,7 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     protected ContactInfo onExecute(Context context, Bundle args) {
                         Address[] addresses = (Address[]) args.getSerializable("addresses");
 
-                        ContactInfo info = ContactInfo.get(context, addresses);
+                        ContactInfo info = ContactInfo.get(context, addresses, false);
 
                         if ((info == null || !info.hasPhoto()) &&
                                 identicons && addresses != null && addresses.length > 0) {
@@ -530,13 +535,9 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                         }
 
                         if ((long) tvFrom.getTag() == id) {
-                            if (info != null && info.hasDisplayName())
-                                try {
+                            if (info != null && info.hasDisplayName()) {
                                 Address[] addresses = (Address[]) args.getSerializable("addresses");
-                                    ((InternetAddress) addresses[0]).setPersonal(info.getDisplayName());
-                                    tvFrom.setText(MessageHelper.formatAddresses(addresses, !compact, false));
-                                } catch (UnsupportedEncodingException ex) {
-                                    Log.w(ex);
+                                setFrom(info, addresses);
                             }
                         }
                     }
@@ -545,6 +546,16 @@ public class AdapterMessage extends RecyclerView.Adapter<AdapterMessage.ViewHold
                     protected void onException(Bundle args, Throwable ex) {
                         Helper.unexpectedError(context, owner, ex);
                     }
+
+
+                    private void setFrom(ContactInfo info, Address[] addresses) {
+                        try {
+                            ((InternetAddress) addresses[0]).setPersonal(info.getDisplayName());
+                            tvFrom.setText(MessageHelper.formatAddresses(addresses, !compact, false));
+                        } catch (UnsupportedEncodingException ex) {
+                            Log.w(ex);
+                        }
+                    }
                 }.execute(context, owner, aargs, "message:avatar");
             } else {
                 ivAvatar.setVisibility(View.GONE);

app/src/main/java/eu/faircode/email/ContactInfo.java

@@ -12,6 +12,9 @@ import android.net.Uri;
 import android.provider.ContactsContract;
 
 import java.io.InputStream;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
 
 import javax.mail.Address;
 import javax.mail.internet.InternetAddress;
@@ -23,6 +26,11 @@ public class ContactInfo {
     private Drawable photo;
     private String displayName;
     private Uri lookupUri;
+    private long time;
+
+    private static Map<String, ContactInfo> emailContactInfo = new HashMap<>();
+
+    private static final long CACHE_DURATION = 60 * 1000L;
 
     ContactInfo() {
     }
@@ -70,7 +78,11 @@ public class ContactInfo {
         return (lookupUri != null);
     }
 
-    static ContactInfo get(Context context, Address[] addresses) {
+    private boolean isExpired() {
+        return (new Date().getTime() - time > CACHE_DURATION);
+    }
+
+    static ContactInfo get(Context context, Address[] addresses, boolean cached) {
         if (addresses == null || addresses.length == 0)
             return null;
 
@@ -78,6 +90,16 @@ public class ContactInfo {
                 != PackageManager.PERMISSION_GRANTED)
             return null;
 
+        String email = ((InternetAddress) addresses[0]).getAddress();
+
+        synchronized (emailContactInfo) {
+            ContactInfo info = emailContactInfo.get(email);
+            if (info != null && !info.isExpired())
+                return info;
+        }
+        if (cached)
+            return null;
+
         try {
             Cursor cursor = null;
             try {
@@ -90,7 +112,7 @@ public class ContactInfo {
                         },
                         ContactsContract.CommonDataKinds.Email.ADDRESS + " = ?",
                         new String[]{
-                                ((InternetAddress) addresses[0]).getAddress()
+                                email
                         }, null);
 
                 if (cursor != null && cursor.moveToNext()) {
@@ -106,6 +128,12 @@ public class ContactInfo {
                     info.is = ContactsContract.Contacts.openContactPhotoInputStream(resolver, lookupUri);
                     info.displayName = cursor.getString(colDisplayName);
                     info.lookupUri = lookupUri;
+                    info.time = new Date().getTime();
+
+                    synchronized (emailContactInfo) {
+                        emailContactInfo.put(email, info);
+                    }
+
                     return info;
                 }
             } finally {

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -489,7 +489,9 @@ public class ServiceSynchronize extends LifecycleService {
         // Get contact info
         Map<TupleMessageEx, ContactInfo> messageContact = new HashMap<>();
         for (TupleMessageEx message : messages) {
-            ContactInfo info = ContactInfo.get(this, message.from);
+            ContactInfo info = ContactInfo.get(this, message.from, true);
+            if (info == null)
+                info = ContactInfo.get(this, message.from, false);
             if (info == null)
                 info = new ContactInfo(MessageHelper.formatAddressesShort(message.from));
             messageContact.put(message, info);