Form: use runCatching to replace exception handling

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

app/src/main/java/com/zeapo/pwdstore/autofill/oreo/AutofillMatcher.kt

@@ -11,6 +11,9 @@ import androidx.core.content.edit
 import com.github.ajalt.timberkt.Timber.e
 import com.github.ajalt.timberkt.d
 import com.github.ajalt.timberkt.w
+import com.github.michaelbull.result.Err
+import com.github.michaelbull.result.Ok
+import com.github.michaelbull.result.Result
 import com.zeapo.pwdstore.R
 import java.io.File
 
@@ -94,18 +97,18 @@ class AutofillMatcher {
          * first time the user associated an entry with it, an [AutofillPublisherChangedException]
          * will be thrown.
          */
-        fun getMatchesFor(context: Context, formOrigin: FormOrigin): List<File> {
+        fun getMatchesFor(context: Context, formOrigin: FormOrigin): Result<List<File>, AutofillPublisherChangedException> {
             if (hasFormOriginHashChanged(context, formOrigin)) {
-                throw AutofillPublisherChangedException(formOrigin)
+                return Err(AutofillPublisherChangedException(formOrigin))
             }
             val matchPreferences = context.matchPreferences(formOrigin)
             val matchedFiles =
                 matchPreferences.getStringSet(matchesKey(formOrigin), emptySet())!!.map { File(it) }
-            return matchedFiles.filter { it.exists() }.also { validFiles ->
+            return Ok(matchedFiles.filter { it.exists() }.also { validFiles ->
                 matchPreferences.edit {
                     putStringSet(matchesKey(formOrigin), validFiles.map { it.absolutePath }.toSet())
                 }
-            }
+            })
         }
 
         fun clearMatchesFor(context: Context, formOrigin: FormOrigin) {

app/src/main/java/com/zeapo/pwdstore/autofill/oreo/Form.kt

@@ -21,6 +21,7 @@ import androidx.annotation.RequiresApi
 import androidx.core.os.bundleOf
 import com.github.ajalt.timberkt.d
 import com.github.ajalt.timberkt.e
+import com.github.michaelbull.result.fold
 import com.zeapo.pwdstore.autofill.oreo.ui.AutofillDecryptActivity
 import com.zeapo.pwdstore.autofill.oreo.ui.AutofillFilterView
 import com.zeapo.pwdstore.autofill.oreo.ui.AutofillPublisherChangedActivity
@@ -369,13 +370,14 @@ class FillableForm private constructor(
      * Creates and returns a suitable [FillResponse] to the Autofill framework.
      */
     fun fillCredentials(context: Context, callback: FillCallback) {
-        val matchedFiles = try {
+        AutofillMatcher.getMatchesFor(context, formOrigin).fold(
-            AutofillMatcher.getMatchesFor(context, formOrigin)
+            success = { matchedFiles ->
-        } catch (publisherChangedException: AutofillPublisherChangedException) {
+                callback.onSuccess(makeFillResponse(context, matchedFiles))
-            e(publisherChangedException)
+            },
-            callback.onSuccess(makePublisherChangedResponse(context, publisherChangedException))
+            failure = { e ->
-            return
+                e(e)
-        }
+                callback.onSuccess(makePublisherChangedResponse(context, e))
-        callback.onSuccess(makeFillResponse(context, matchedFiles))
+            }
+        )
     }
 }