Tests, API-backed feature gaps, and Fluent emoji everywhere

.github/workflows/ci.yml

@@ -32,9 +32,11 @@ jobs:
           distribution: temurin
           java-version: 21
       - uses: gradle/actions/setup-gradle@v5
-      # Lint first: a lint failure should not cost a full APK build.
+      # Lint and tests first: neither should cost a full APK build.
       - name: Lint
         run: ./gradlew :app:lintDebug
+      - name: Unit tests
+        run: ./gradlew :app:testDebugUnitTest
       - name: Build debug APK
         run: ./gradlew :app:assembleDebug
       # Unsigned, but proves the R8/minify path before launch week does.

app/build.gradle.kts

@@ -83,4 +83,9 @@ dependencies {
     implementation(libs.navigation3.ui)
     implementation(libs.kotlinx.serialization.json)
     implementation(libs.spoo.sdk)
+
+    testImplementation(libs.junit)
+    testImplementation(libs.kotlin.test)
+    testImplementation(libs.kotlinx.coroutines.test)
+    testImplementation(libs.turbine)
 }

app/src/main/kotlin/me/spoo/android/data/Links.kt

@@ -23,14 +23,16 @@ data class SpooLink(
     /** Whether known bots are kept from following the link. */
     val blockBots: Boolean = false,
     val createdAtMillis: Long? = null,
+    /** Most recent click, when the link has ever been clicked. */
+    val lastClickMillis: Long? = null,
 ) {
     val shortUrl: String get() = "spoo.me/$shortCode"
     val active: Boolean get() = status == LinkUiStatus.Active
     val clickLimited: Boolean get() = maxClicks != null
 }
 
 /** Sort order for the links list. */
-enum class LinkSort { Recent, Clicks }
+enum class LinkSort { Recent, Clicks, LastClick }
 
 /**
  * The server-side view of the links list. Search, sort and filters ride
@@ -111,14 +113,27 @@ data class EmojiChoice(
     val keywords: List<String> = emptyList(),
 )
 
+/** Why an alias can't be used, or [Free] when it can. */
+enum class AliasStatus { Free, Taken, Reserved, Invalid, Unknown }
+
 /** The accepted emoji catalogue plus the alias-length policy. */
 data class EmojiCatalog(
     val maxGraphemes: Int,
     val entries: List<EmojiChoice>,
 )
 
 /** A dimension the stats screens can filter by. */
-enum class StatsDim { Country, Browser, Os, Referrer }
+enum class StatsDim(
+    /** Human label; the enum name alone reads UTMSOURCE. */
+    val display: String,
+) {
+    Country("Country"),
+    Browser("Browser"),
+    Os("OS"),
+    Referrer("Referrer"),
+    Device("Device"),
+    UtmSource("UTM source"),
+}
 
 /** The countable thing a stats query asks for. */
 enum class StatsMetric { Clicks, UniqueClicks }
@@ -143,6 +158,8 @@ data class LinkStats(
     val browsers: List<Slice>,
     val os: List<Slice>,
     val referrers: List<Slice>,
+    val devices: List<Slice> = emptyList(),
+    val utmSources: List<Slice> = emptyList(),
 ) {
     data class Slice(
         val label: String,

app/src/main/kotlin/me/spoo/android/data/LinksRepository.kt

@@ -58,4 +58,7 @@ interface LinksRepository {
 
     /** The accepted emoji-alias catalogue; changes rarely, cached upstream. */
     suspend fun emojiCatalog(): EmojiCatalog
+
+    /** Whether [alias] can be claimed, and when not, why. */
+    suspend fun aliasStatus(alias: String): AliasStatus
 }

app/src/main/kotlin/me/spoo/android/data/MockLinksRepository.kt

@@ -113,6 +113,7 @@ class MockLinksRepository : LinksRepository {
                     when (query.sort) {
                         LinkSort.Recent -> list
                         LinkSort.Clicks -> list.sortedByDescending { it.totalClicks }
+                        LinkSort.LastClick -> list.sortedByDescending { it.lastClickMillis ?: Long.MIN_VALUE }
                     }
                 }
         _links.value = full.take(visible)
@@ -271,6 +272,19 @@ class MockLinksRepository : LinksRepository {
         return EmojiCatalog(maxGraphemes = 15, entries = MOCK_EMOJI)
     }
 
+    override suspend fun aliasStatus(alias: String): AliasStatus {
+        delay(250)
+        // Aliases are case-sensitive server-side; RESERVED_ALIASES stands in
+        // for the platform's reserved set so the copy path is demoable.
+        return when {
+            alias.lowercase() in RESERVED_ALIASES -> AliasStatus.Reserved
+            !alias.any(Char::isLetterOrDigit) && alias.isNotEmpty() -> AliasStatus.Free
+            alias.length < 3 && alias.all { it.code < 128 } -> AliasStatus.Invalid
+            all.value.any { it.shortCode == alias } -> AliasStatus.Taken
+            else -> AliasStatus.Free
+        }
+    }
+
     private val statsCache = mutableMapOf<String, LinkStats>()
 
     override fun cachedStats(
@@ -332,6 +346,8 @@ class MockLinksRepository : LinksRepository {
         share(REFERRERS, params.filters[StatsDim.Referrer])?.let { total *= it }
         share(BROWSERS, params.filters[StatsDim.Browser])?.let { total *= it }
         share(OSES, params.filters[StatsDim.Os])?.let { total *= it }
+        share(DEVICES, params.filters[StatsDim.Device])?.let { total *= it }
+        share(UTM_SOURCES, params.filters[StatsDim.UtmSource])?.let { total *= it }
 
         val points = days.coerceIn(7, 120)
         val weights =
@@ -365,6 +381,8 @@ class MockLinksRepository : LinksRepository {
             browsers = slices(BROWSERS, params.filters[StatsDim.Browser]),
             os = slices(OSES, params.filters[StatsDim.Os]),
             referrers = slices(REFERRERS, params.filters[StatsDim.Referrer]),
+            devices = slices(DEVICES, params.filters[StatsDim.Device]),
+            utmSources = slices(UTM_SOURCES, params.filters[StatsDim.UtmSource]),
         )
     }
 
@@ -390,6 +408,16 @@ class MockLinksRepository : LinksRepository {
         maxClicks = maxClicks,
         expireAtMillis = expiresInDays?.let { System.currentTimeMillis() + it * 86_400_000L },
         createdAtMillis = System.currentTimeMillis() - ageDays * 86_400_000L,
+        // Busier links were clicked more recently, always inside the
+        // link's own lifetime; deterministic per link.
+        lastClickMillis =
+            if (clicks == 0) {
+                null
+            } else {
+                val lifetime = ageDays.coerceAtLeast(1) * 86_400_000L
+                val idle = lifetime / (1 + clicks / 500).coerceAtMost(24)
+                System.currentTimeMillis() - (idle + id.hashCode().mod(6) * 3_600_000L).coerceAtMost(lifetime)
+            },
     )
 
     private companion object {
@@ -439,6 +467,24 @@ class MockLinksRepository : LinksRepository {
                 "Linux" to 0.09f,
             )
 
+        val DEVICES =
+            listOf(
+                "mobile" to 0.58f,
+                "desktop" to 0.33f,
+                "tablet" to 0.07f,
+                "unknown" to 0.02f,
+            )
+        val UTM_SOURCES =
+            listOf(
+                "(none)" to 0.61f,
+                "newsletter" to 0.14f,
+                "twitter" to 0.11f,
+                "producthunt" to 0.08f,
+                "discord" to 0.06f,
+            )
+
+        val RESERVED_ALIASES = setOf("api", "login", "signup", "admin", "stats", "dashboard")
+
         // Offline stand-in for /api/v1/emoji-set: real groups, tiny slices.
         val MOCK_EMOJI =
             listOf(

app/src/main/kotlin/me/spoo/android/data/SdkLinksRepository.kt

@@ -9,6 +9,7 @@ import kotlinx.serialization.json.contentOrNull
 import kotlinx.serialization.json.jsonPrimitive
 import kotlinx.serialization.json.longOrNull
 import me.spoo.AccountStatsRequest
+import me.spoo.AliasIssue
 import me.spoo.AliasKind
 import me.spoo.AuthenticationException
 import me.spoo.Dimension
@@ -90,6 +91,7 @@ class SdkLinksRepository(
                 when (sort) {
                     LinkSort.Recent -> SortBy.CREATED_AT
                     LinkSort.Clicks -> SortBy.TOTAL_CLICKS
+                    LinkSort.LastClick -> SortBy.LAST_CLICK
                 },
             sortOrder = SortOrder.DESCENDING,
             // The typed status param only speaks active/inactive; expired and
@@ -231,6 +233,18 @@ class SdkLinksRepository(
     // changes; the set is public and near-static, so one fetch per process.
     private var cachedCatalog: EmojiCatalog? = null
 
+    override suspend fun aliasStatus(alias: String): AliasStatus =
+        withSession {
+            val check = clientProvider().links.checkAlias(alias)
+            when {
+                check.available -> AliasStatus.Free
+                check.reason == AliasIssue.TAKEN -> AliasStatus.Taken
+                check.reason == AliasIssue.RESERVED -> AliasStatus.Reserved
+                check.reason != null -> AliasStatus.Invalid
+                else -> AliasStatus.Unknown
+            }
+        }
+
     override suspend fun emojiCatalog(): EmojiCatalog {
         cachedCatalog?.let { return it }
         val set = clientProvider().emoji.set()
@@ -303,6 +317,8 @@ class SdkLinksRepository(
                     Dimension.BROWSER,
                     Dimension.OS,
                     Dimension.REFERRER,
+                    Dimension.DEVICE,
+                    Dimension.UTM_SOURCE,
                 ),
             metrics =
                 listOf(
@@ -318,6 +334,8 @@ class SdkLinksRepository(
                         StatsDim.Browser -> FilterDimension.BROWSER
                         StatsDim.Os -> FilterDimension.OS
                         StatsDim.Referrer -> FilterDimension.REFERRER
+                        StatsDim.Device -> FilterDimension.DEVICE
+                        StatsDim.UtmSource -> FilterDimension.UTM_SOURCE
                     } to values.toList()
                 },
         )
@@ -332,6 +350,8 @@ class SdkLinksRepository(
         browsers = slices("${metricKey}_by_browser", metricKey),
         os = slices("${metricKey}_by_os", metricKey),
         referrers = slices("${metricKey}_by_referrer", metricKey),
+        devices = slices("${metricKey}_by_device", metricKey),
+        utmSources = slices("${metricKey}_by_utm_source", metricKey),
     )
 
     private fun Map<String, List<JsonObject>>.slices(
@@ -380,6 +400,7 @@ class SdkLinksRepository(
             privateStats = privateStats ?: false,
             blockBots = blockBots ?: false,
             createdAtMillis = createdAt?.toEpochMilliseconds(),
+            lastClickMillis = lastClick?.toEpochMilliseconds(),
         )
 
     private fun Instant.toDayLabel(): String = SimpleDateFormat("MMM d", Locale.US).format(Date(toEpochMilliseconds()))

app/src/main/kotlin/me/spoo/android/data/SwitchingLinksRepository.kt

@@ -81,4 +81,6 @@ class SwitchingLinksRepository(
     ) = active.cachedStats(shortCode, params)
 
     override suspend fun emojiCatalog() = active.emojiCatalog()
+
+    override suspend fun aliasStatus(alias: String) = active.aliasStatus(alias)
 }

app/src/main/kotlin/me/spoo/android/ui/components/CreateLinkSheet.kt

@@ -54,6 +54,7 @@ import androidx.compose.material3.TooltipDefaults
 import androidx.compose.material3.rememberModalBottomSheetState
 import androidx.compose.material3.rememberTooltipState
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
@@ -64,6 +65,8 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalClipboardManager
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.semantics.contentDescription
+import androidx.compose.ui.semantics.semantics
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.input.PasswordVisualTransformation
@@ -73,6 +76,7 @@ import androidx.compose.ui.unit.IntSize
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import kotlinx.coroutines.launch
+import me.spoo.android.data.AliasStatus
 import me.spoo.android.data.CreateLinkRequest
 import me.spoo.android.data.EmojiCatalog
 import me.spoo.android.data.ErrorField
@@ -90,6 +94,8 @@ fun CreateLinkSheet(
     initialUrl: String?,
     state: CreateState,
     emojiCatalog: EmojiCatalog?,
+    aliasStatus: AliasStatus,
+    onAliasChanged: (String) -> Unit,
     onEmojiMode: () -> Unit,
     onSubmit: (CreateLinkRequest) -> Unit,
     onDismiss: () -> Unit,
@@ -134,6 +140,8 @@ fun CreateLinkSheet(
                         submitting = state is CreateState.Submitting,
                         error = (state as? CreateState.Failed)?.error,
                         emojiCatalog = emojiCatalog,
+                        aliasStatus = aliasStatus,
+                        onAliasChanged = onAliasChanged,
                         onEmojiMode = {
                             onEmojiMode()
                             // The picker deserves the room: pop the sheet open.
@@ -155,6 +163,8 @@ private fun FormPhase(
     submitting: Boolean,
     error: FriendlyError?,
     emojiCatalog: EmojiCatalog?,
+    aliasStatus: AliasStatus,
+    onAliasChanged: (String) -> Unit,
     onEmojiMode: () -> Unit,
     onSubmit: (CreateLinkRequest) -> Unit,
 ) {
@@ -175,6 +185,19 @@ private fun FormPhase(
     val emojiCount = emojiPicks.codePointCount(0, emojiPicks.length)
     val emojiMax = emojiCatalog?.maxGraphemes ?: Int.MAX_VALUE
 
+    // Live availability: report the effective alias upstream, debounced
+    // and checked in the view model; "taken" comes back as [aliasTaken].
+    val effectiveAlias = if (emojiAlias) emojiPicks else alias.trim()
+    LaunchedEffect(effectiveAlias) { onAliasChanged(effectiveAlias) }
+    val aliasBlocked = aliasStatus != AliasStatus.Free && aliasStatus != AliasStatus.Unknown
+    val aliasMessage =
+        when (aliasStatus) {
+            AliasStatus.Taken -> "Already taken"
+            AliasStatus.Reserved -> "Reserved by spoo.me"
+            AliasStatus.Invalid -> "Not a usable alias"
+            else -> null
+        }
+
     // Prevention first, server as backstop: local checks gate the button;
     // whatever still comes back lands on the field the server names.
     val urlOk = isLikelyUrl(url)
@@ -216,15 +239,40 @@ private fun FormPhase(
         // icon swaps back. In emoji mode the field is a read-only composed
         // display, so an invalid alias can't be typed.
         OutlinedTextField(
-            value = if (emojiAlias) emojiPicks.emojiPresentationAll() else alias,
+            // Emoji live in the prefix slot as Fluent artwork. The text slot
+            // carries a zero-width space when picks exist: an empty unfocused
+            // field hides its prefix and floats the label back down.
+            value =
+                when {
+                    !emojiAlias -> alias
+                    emojiPicks.isEmpty() -> ""
+                    else -> "\u200B"
+                },
             // The API's alias charset, enforced at the keyboard: no error to show.
             onValueChange = { if (!emojiAlias) alias = it.filter(::isAliasChar) },
             modifier = Modifier.fillMaxWidth(),
             readOnly = emojiAlias,
             label = { Text(if (emojiAlias) "Emoji alias" else "Alias") },
-            placeholder = { Text("Random if empty", maxLines = 1) },
-            prefix = { Text("spoo.me/") },
-            isError = error?.field == ErrorField.Alias,
+            placeholder =
+                if (emojiAlias && emojiPicks.isNotEmpty()) {
+                    null
+                } else {
+                    { Text("Random if empty", maxLines = 1) }
+                },
+            prefix = {
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text("spoo.me/")
+                    if (emojiAlias && emojiPicks.isNotEmpty()) {
+                        EmojiText(
+                            emojiPicks.emojiPresentationAll(),
+                            maxLines = 1,
+                            overflow = TextOverflow.Ellipsis,
+                            modifier = Modifier.semantics { contentDescription = "Alias $emojiPicks" },
+                        )
+                    }
+                }
+            },
+            isError = aliasBlocked || error?.field == ErrorField.Alias,
             trailingIcon = {
                 Row {
                     if (emojiAlias && emojiPicks.isNotEmpty()) {
@@ -241,7 +289,10 @@ private fun FormPhase(
                     IconButton(
                         onClick = {
                             emojiAlias = !emojiAlias
-                            if (emojiAlias) onEmojiMode()
+                            // Leaving emoji mode drops the picks: keeping them
+                            // hidden would submit a random code while the user
+                            // believes an alias is set.
+                            if (emojiAlias) onEmojiMode() else emojiPicks = ""
                         },
                         enabled = !submitting,
                     ) {
@@ -255,6 +306,7 @@ private fun FormPhase(
             supportingText =
                 when {
                     error?.field == ErrorField.Alias -> ({ Text(error.message) })
+                    aliasMessage != null -> ({ Text(aliasMessage) })
                     emojiAlias && emojiCatalog != null && emojiCount > 0 ->
                         ({ Text("$emojiCount/${emojiCatalog.maxGraphemes}") })
                     else -> null
@@ -410,7 +462,7 @@ private fun FormPhase(
                 )
             },
             modifier = Modifier.fillMaxWidth(),
-            enabled = !submitting && urlOk && passwordOk,
+            enabled = !submitting && urlOk && passwordOk && !aliasBlocked,
         ) {
             if (submitting) {
                 LoadingIndicator(modifier = Modifier.height(24.dp))