data: add hand crafted rules to filter the models fetched from HuggingFace API

examples/llama.android/app/src/main/java/com/example/llama/data/repo/ModelRepository.kt

@@ -83,7 +83,7 @@ interface ModelRepository {
     /**
      * Search models on HuggingFace
      */
-    suspend fun searchHuggingFaceModels(limit: Int = 20): Result<List<HuggingFaceModel>>
+    suspend fun searchHuggingFaceModels(limit: Int): Result<List<HuggingFaceModel>>
 
     /**
      * Obtain the model details from HuggingFace

examples/llama.android/app/src/main/java/com/example/llama/data/source/remote/HuggingFaceModel.kt

@@ -5,7 +5,8 @@ import androidx.core.net.toUri
 import com.example.llama.di.HUGGINGFACE_HOST
 import java.util.Date
 
-private const val FILE_EXTENSION_GGUF = ".gguf"
+private const val FILE_EXTENSION_GGUF = ".GGUF"
+private val QUANTIZATION_Q4_0 = arrayOf("Q4_0", "Q4-0")
 
 data class HuggingFaceModel(
     val _id: String,
@@ -34,10 +35,23 @@ data class HuggingFaceModel(
         val rfilename: String,
     )
 
-    fun getGgufFilename(): String? =
-        siblings.map { it.rfilename }.firstOrNull { it.endsWith(FILE_EXTENSION_GGUF) }
+    fun getGgufFilename(keywords: Array<String> = QUANTIZATION_Q4_0): String? =
+        siblings.map { it.rfilename }
+            .filter {
+                it.endsWith(FILE_EXTENSION_GGUF, ignoreCase = true) }
+            .firstOrNull { filename ->
+                keywords.any { filename.contains(it, ignoreCase = true) }
+            }
 
-    fun toDownloadInfo() = getGgufFilename()?.let { HuggingFaceDownloadInfo(_id, modelId, it) }
+    fun anyFilenameContains(keywords: Array<String>): Boolean =
+        siblings.map { it.rfilename }
+            .any { filename ->
+                keywords.any { filename.contains(it, ignoreCase = true) }
+            }
+
+    fun toDownloadInfo() = getGgufFilename()?.let {
+        HuggingFaceDownloadInfo(_id, modelId, it)
+    }
 }
 
 data class HuggingFaceDownloadInfo(

examples/llama.android/app/src/main/java/com/example/llama/data/source/remote/HuggingFaceRemoteDataSource.kt

@@ -15,7 +15,9 @@ import javax.inject.Singleton
 private const val QUERY_Q4_0_GGUF = "gguf q4_0"
 private const val FILTER_TEXT_GENERATION = "text-generation"
 private const val SORT_BY_DOWNLOADS = "downloads"
-private const val SEARCH_RESULT_LIMIT = 20
+private const val SEARCH_RESULT_LIMIT = 30
+
+private val INVALID_KEYWORDS = arrayOf("-of-", "split", "70B", "30B", "27B", "14B", "13B", "12B")
 
 interface HuggingFaceRemoteDataSource {
     /**
@@ -67,11 +69,18 @@ class HuggingFaceRemoteDataSourceImpl @Inject constructor(
                 direction = direction,
                 limit = limit,
                 full = full,
-            ).filter {
-                it.gated != true && it.private != true && it.getGgufFilename() != null
-            }.let {
-                if (it.isEmpty()) Result.failure(FileNotFoundException()) else Result.success(it)
-            }
+            )
+                .filterNot { it.gated || it.private }
+                .filterNot {
+                    it.getGgufFilename().let { filename ->
+                        filename.isNullOrBlank() || INVALID_KEYWORDS.any {
+                            filename.contains(it, ignoreCase = true)
+                        }
+                    }
+                }.let {
+                    if (it.isEmpty()) Result.failure(FileNotFoundException())
+                    else Result.success(it)
+                }
         } catch (e: Exception) {
             Log.e(TAG, "Error searching for models on HuggingFace: ${e.message}")
             Result.failure(e)

examples/llama.android/app/src/main/java/com/example/llama/ui/screens/ModelsManagementAndDeletingScreen.kt

@@ -442,8 +442,11 @@ private fun ImportFromHuggingFaceDialog(
             ) {
                 Text(
                     modifier = Modifier.fillMaxWidth(),
-                    text = models?.let { "Select a model to download:" }
-                        ?: "Searching on HuggingFace for models available for direct download...",
+                    text = models?.let {
+                        "These open-source models from Hugging Face are ungated and free for everyone.\n\n" +
+                            "Please use them at your own discretion.\n\n" +
+                            "Select a model and tap download button:"
+                    } ?: "Searching on HuggingFace for ungated models available for free downloading...",
                     style = MaterialTheme.typography.bodyLarge,
                     textAlign = TextAlign.Start,
                 )

examples/llama.android/app/src/main/java/com/example/llama/viewmodel/ModelsManagementViewModel.kt

@@ -182,14 +182,14 @@ class ModelsManagementViewModel @Inject constructor(
     /**
      * Query models on HuggingFace available for download even without signing in
      */
-    fun queryModelsFromHuggingFace() {
+    fun queryModelsFromHuggingFace(cap: Int = FETCH_HUGGINGFACE_MODELS_CAP_SIZE) {
         huggingFaceQueryJob = viewModelScope.launch {
             _managementState.emit(Download.Querying)
             try {
-                modelRepository.searchHuggingFaceModels().fold(
+                modelRepository.searchHuggingFaceModels(FETCH_HUGGINGFACE_MODELS_LIMIT_SIZE).fold(
                     onSuccess = { models ->
-                        Log.d(TAG, "Fetched ${models.size} models from HuggingFace:")
-                        _managementState.emit(Download.Ready(models))
+                        Log.d(TAG, "Fetched ${models.size} models from HuggingFace, capped by $cap:\n")
+                        _managementState.emit(Download.Ready(models.take(cap)))
                     },
                     onFailure = { throw it }
                 )
@@ -303,6 +303,8 @@ class ModelsManagementViewModel @Inject constructor(
     companion object {
         private val TAG = ModelsManagementViewModel::class.java.simpleName
 
+        private const val FETCH_HUGGINGFACE_MODELS_LIMIT_SIZE = 50
+        private const val FETCH_HUGGINGFACE_MODELS_CAP_SIZE = 12
         private const val DELETE_SUCCESS_RESET_TIMEOUT_MS = 1000L
     }
 }