feat(notifications): rich contact-chat notifications with name resolution fallback

apps/flipcash/shared/contacts/src/main/kotlin/com/flipcash/app/contacts/ContactResolver.kt

@@ -0,0 +1,22 @@
+package com.flipcash.app.contacts
+
+import com.flipcash.app.contacts.device.DeviceContactLookup
+import com.flipcash.app.persistence.sources.ContactDataSource
+import com.flipcash.app.phone.PhoneUtils
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class ContactResolver @Inject constructor(
+    private val contactDataSource: ContactDataSource,
+    private val deviceContactLookup: DeviceContactLookup,
+    private val phoneUtils: PhoneUtils,
+) {
+    suspend fun resolveName(e164: String, fallback: String = e164): String =
+        contactDataSource.getDisplayName(e164)
+            ?: deviceContactLookup.lookupDisplayName(e164)
+            ?: runCatching { phoneUtils.formatNumber(e164) }.getOrDefault(fallback)
+
+    suspend fun resolvePhotoUri(e164: String): String? =
+        contactDataSource.getPhotoUri(e164)
+}

apps/flipcash/shared/contacts/src/main/kotlin/com/flipcash/app/contacts/device/DeviceContactLookup.kt

@@ -0,0 +1,5 @@
+package com.flipcash.app.contacts.device
+
+interface DeviceContactLookup {
+    fun lookupDisplayName(e164: String): String?
+}

apps/flipcash/shared/contacts/src/main/kotlin/com/flipcash/app/contacts/device/internal/AndroidDeviceContactLookup.kt

@@ -0,0 +1,40 @@
+package com.flipcash.app.contacts.device.internal
+
+import android.Manifest
+import android.content.Context
+import android.content.pm.PackageManager
+import android.provider.ContactsContract
+import androidx.core.content.ContextCompat
+import com.flipcash.app.contacts.device.DeviceContactLookup
+import dagger.hilt.android.qualifiers.ApplicationContext
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+internal class AndroidDeviceContactLookup @Inject constructor(
+    @param:ApplicationContext private val context: Context,
+) : DeviceContactLookup {
+
+    override fun lookupDisplayName(e164: String): String? {
+        if (ContextCompat.checkSelfPermission(context, Manifest.permission.READ_CONTACTS)
+            != PackageManager.PERMISSION_GRANTED
+        ) return null
+
+        val uri = ContactsContract.PhoneLookup.CONTENT_FILTER_URI
+            .buildUpon()
+            .appendPath(e164)
+            .build()
+
+        return try {
+            context.contentResolver.query(
+                uri,
+                arrayOf(ContactsContract.PhoneLookup.DISPLAY_NAME),
+                null, null, null
+            )?.use { cursor ->
+                if (cursor.moveToFirst()) cursor.getString(0)?.takeIf { it.isNotEmpty() } else null
+            }
+        } catch (e: Exception) {
+            null
+        }
+    }
+}

apps/flipcash/shared/contacts/src/main/kotlin/com/flipcash/app/contacts/inject/ContactModule.kt

@@ -1,6 +1,8 @@
 package com.flipcash.app.contacts.inject
 
 import com.flipcash.app.contacts.ContactCoordinator
+import com.flipcash.app.contacts.device.DeviceContactLookup
+import com.flipcash.app.contacts.device.internal.AndroidDeviceContactLookup
 import com.getcode.opencode.providers.SessionListener
 import dagger.Binds
 import dagger.Module
@@ -17,4 +19,9 @@ abstract class ContactModule {
     abstract fun bindSessionListener(
         coordinator: ContactCoordinator
     ): SessionListener
+
+    @Binds
+    internal abstract fun bindDeviceContactLookup(
+        impl: AndroidDeviceContactLookup
+    ): DeviceContactLookup
 }

apps/flipcash/shared/contacts/src/test/kotlin/com/flipcash/app/contacts/ContactResolverTest.kt

@@ -0,0 +1,97 @@
+package com.flipcash.app.contacts
+
+import com.flipcash.app.contacts.device.DeviceContactLookup
+import com.flipcash.app.persistence.sources.ContactDataSource
+import com.flipcash.app.phone.PhoneUtils
+import io.mockk.coEvery
+import io.mockk.every
+import io.mockk.mockk
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+
+class ContactResolverTest {
+
+    private val e164 = "+15551234567"
+
+    private fun resolver(
+        dbName: String? = null,
+        deviceName: String? = null,
+        formatted: String? = null,
+        formatThrows: Boolean = false,
+        photoUri: String? = null,
+    ): ContactResolver {
+        val dataSource = mockk<ContactDataSource> {
+            coEvery { getDisplayName(e164) } returns dbName
+            coEvery { getPhotoUri(e164) } returns photoUri
+        }
+        val deviceLookup = mockk<DeviceContactLookup> {
+            every { lookupDisplayName(e164) } returns deviceName
+        }
+        val phoneUtils = mockk<PhoneUtils> {
+            if (formatThrows) {
+                every { formatNumber(any<String>()) } throws RuntimeException("parse error")
+            } else {
+                every { formatNumber(any<String>()) } returns (formatted ?: e164)
+            }
+        }
+        return ContactResolver(dataSource, deviceLookup, phoneUtils)
+    }
+
+    // region resolveName
+
+    @Test
+    fun `DB display name is returned when present`() = runTest {
+        val result = resolver(dbName = "Alice").resolveName(e164)
+        assertEquals("Alice", result)
+    }
+
+    @Test
+    fun `device lookup is used when DB returns null`() = runTest {
+        val result = resolver(deviceName = "Bob Device").resolveName(e164)
+        assertEquals("Bob Device", result)
+    }
+
+    @Test
+    fun `formatted number is used when DB and device both return null`() = runTest {
+        val result = resolver(formatted = "+1 (555) 123-4567").resolveName(e164)
+        assertEquals("+1 (555) 123-4567", result)
+    }
+
+    @Test
+    fun `fallback is returned when all sources fail`() = runTest {
+        val result = resolver(formatThrows = true).resolveName(e164, fallback = "unknown")
+        assertEquals("unknown", result)
+    }
+
+    @Test
+    fun `raw e164 is default fallback`() = runTest {
+        val result = resolver(formatThrows = true).resolveName(e164)
+        assertEquals(e164, result)
+    }
+
+    @Test
+    fun `DB takes priority over device lookup`() = runTest {
+        val result = resolver(dbName = "Alice DB", deviceName = "Alice Device").resolveName(e164)
+        assertEquals("Alice DB", result)
+    }
+
+    // endregion
+
+    // region resolvePhotoUri
+
+    @Test
+    fun `photo URI is returned from data source`() = runTest {
+        val result = resolver(photoUri = "content://photo/1").resolvePhotoUri(e164)
+        assertEquals("content://photo/1", result)
+    }
+
+    @Test
+    fun `null photo URI when data source has none`() = runTest {
+        val result = resolver().resolvePhotoUri(e164)
+        assertNull(result)
+    }
+
+    // endregion
+}

apps/flipcash/shared/notifications/build.gradle.kts

@@ -23,4 +23,6 @@ dependencies {
 
     testImplementation(kotlin("test"))
     testImplementation(libs.robolectric)
+    testImplementation(libs.mockk)
+    testImplementation(libs.kotlinx.coroutines.test)
 }