fix(templates): project name is not properly updated if project with same name already exists

app/src/main/java/com/itsaky/androidide/activities/MainActivity.kt

@@ -44,6 +44,7 @@ import com.itsaky.androidide.preferences.internal.statConsentDialogShown
 import com.itsaky.androidide.preferences.internal.statOptIn
 import com.itsaky.androidide.projects.ProjectManager.projectPath
 import com.itsaky.androidide.resources.R.string
+import com.itsaky.androidide.templates.ITemplateProvider
 import com.itsaky.androidide.utils.DialogUtils
 import com.itsaky.androidide.utils.Environment
 import com.itsaky.androidide.utils.flashError
@@ -292,6 +293,7 @@ class MainActivity : LimitlessIDEActivity() {
   }
 
   override fun onDestroy() {
+    ITemplateProvider.getInstance().release()
     super.onDestroy()
     _binding = null
   }

app/src/main/java/com/itsaky/androidide/fragments/TemplateDetailsFragment.kt

@@ -73,8 +73,10 @@ class TemplateDetailsFragment :
 
     binding.finish.setOnClickListener {
       viewModel.creatingProject.value = true
-      val template = checkNotNull(
-        viewModel.template.value) { "Cannot create project. Template not found." }
+      val template = viewModel.template.value ?: run {
+        viewModel.setScreen(MainViewModel.SCREEN_MAIN)
+        return@setOnClickListener
+      }
 
       val isValid = template.parameters.fold(true) { isValid, param ->
         if (param is StringParameter) {

app/src/main/java/com/itsaky/androidide/fragments/TemplateListFragment.kt

@@ -29,6 +29,7 @@ import com.itsaky.androidide.adapters.TemplateListAdapter
 import com.itsaky.androidide.databinding.FragmentTemplateListBinding
 import com.itsaky.androidide.templates.ITemplateProvider
 import com.itsaky.androidide.templates.ProjectTemplate
+import com.itsaky.androidide.utils.ILogger
 import com.itsaky.androidide.viewmodel.MainViewModel
 import kotlin.math.ceil
 
@@ -51,21 +52,10 @@ class TemplateListFragment : FragmentWithBinding<FragmentTemplateListBinding>(
   override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
     super.onViewCreated(view, savedInstanceState)
 
-    // Show only project templates
-    val templates = ITemplateProvider.getInstance(true)
-      .getTemplates()
-      .filterIsInstance<ProjectTemplate>()
-
     layoutManager = FlexboxLayoutManager(requireContext(), FlexDirection.ROW)
     layoutManager!!.justifyContent = JustifyContent.SPACE_EVENLY
 
-    adapter = TemplateListAdapter(templates) { template, _ ->
-      viewModel.template.value = template
-      viewModel.setScreen(MainViewModel.SCREEN_TEMPLATE_DETAILS)
-    }
-
     binding.list.layoutManager = layoutManager
-    binding.list.adapter = adapter
 
     // This makes sure that the items are evenly distributed in the list
     // and the last row is always aligned to the start
@@ -98,12 +88,40 @@ class TemplateListFragment : FragmentWithBinding<FragmentTemplateListBinding>(
     binding.exitButton.setOnClickListener {
       viewModel.setScreen(MainViewModel.SCREEN_MAIN)
     }
+
+    viewModel.currentScreen.observe(viewLifecycleOwner) { current ->
+      if (current == MainViewModel.SCREEN_TEMPLATE_DETAILS) {
+        return@observe
+      }
+
+      reloadTemplates()
+    }
   }
 
   override fun onDestroyView() {
     binding.list.viewTreeObserver.removeOnGlobalLayoutListener(globalLayoutListener)
-    ITemplateProvider.getInstance().clear()
     super.onDestroyView()
   }
 
+  private val log = ILogger.newInstance("TemplateListFragment")
+
+  private fun reloadTemplates() {
+    _binding ?: return
+
+    log.debug("Reloading templates...")
+
+    // Show only project templates
+    // reloading the tempaltes also makes sure that the resources are
+    // released from template parameter widgets
+    val templates = ITemplateProvider.getInstance(reload = true)
+      .getTemplates()
+      .filterIsInstance<ProjectTemplate>()
+
+    adapter = TemplateListAdapter(templates) { template, _ ->
+      viewModel.template.value = template
+      viewModel.setScreen(MainViewModel.SCREEN_TEMPLATE_DETAILS)
+    }
+
+    binding.list.adapter = adapter
+  }
 }

templates-api/src/main/java/com/itsaky/androidide/templates/ITemplateProvider.kt

@@ -39,12 +39,9 @@ interface ITemplateProvider {
     @JvmStatic
     @JvmOverloads
     fun getInstance(reload: Boolean = false): ITemplateProvider {
-      if (reload) {
-        provider?.clear()
-        provider = null
-      }
 
-      return provider ?: ServiceLoader.load(ITemplateProvider::class.java)
+      return provider?.also { if (reload) it.reload() } ?: ServiceLoader.load(
+        ITemplateProvider::class.java)
         .findFirstOrThrow()
         .also { provider = it }
     }
@@ -71,8 +68,13 @@ interface ITemplateProvider {
    */
   fun getTemplate(templateId: String): Template<*>?
 
+  /**
+   * Reloads the templates.
+   */
+  fun reload()
+
   /**
    * Clear all the templates stored in the provider.
    */
-  fun clear()
+  fun release()
 }

templates-api/src/main/java/com/itsaky/androidide/templates/base/base.kt

@@ -86,7 +86,9 @@ fun baseProject(projectName: StringParameter = projectNameParameter(),
       constraints = listOf(NONEMPTY, DIRECTORY, EXISTS)
     }
 
-    projectName.setValue(getNewProjectName(saveLocation.value, projectName.value))
+    projectName.doBeforeCreateView {
+      it.setValue(getNewProjectName(saveLocation.value, projectName.value))
+    }
 
     widgets(TextFieldWidget(projectName), TextFieldWidget(packageName),
       TextFieldWidget(saveLocation), SpinnerWidget(language),

templates-api/src/main/java/com/itsaky/androidide/templates/parameters.kt

@@ -81,14 +81,17 @@ enum class ParameterConstraint {
 }
 
 abstract class Parameter<T>(@StringRes val name: Int,
-                            @StringRes val description: Int?, val default: T,
-                            var constraints: List<ParameterConstraint>
+  @StringRes val description: Int?, val default: T,
+  var constraints: List<ParameterConstraint>
 ) {
 
   private val observers = hashSetOf<Observer<T>>()
   private val lock = ReentrantLock()
   private var _value: T? = null
 
+  private var actionBeforeCreateView: ((Parameter<T>) -> Unit)? = null
+  private var actionAfterCreateView: ((Parameter<T>) -> Unit)? = null
+
   /**
    * The value of this parameter.
    */
@@ -109,6 +112,16 @@ abstract class Parameter<T>(@StringRes val name: Int,
     }
   }
 
+  /**
+   * Resets the parameter value to the default value and removes any external value observers.
+   *
+   * @param notify Whether the observers should be notified about this change or not.
+   */
+  fun reset(notify: Boolean = true) {
+    setValue(default, notify)
+    clearObservers()
+  }
+
   /**
    * Adds the [Observer] instance to the list of observers.
    *
@@ -134,11 +147,52 @@ abstract class Parameter<T>(@StringRes val name: Int,
   }
 
   fun release() {
+    clearObservers()
+
+    this.actionBeforeCreateView = null
+    this.actionAfterCreateView = null
+  }
+
+  private fun clearObservers() {
     lock.withLock {
       observers.clear()
     }
   }
 
+  /**
+   * Perform the given action before the view is created.
+   *
+   * @param action The action to execute.
+   * @see beforeCreateView
+   */
+  fun doBeforeCreateView(action: (Parameter<T>) -> Unit) {
+    this.actionBeforeCreateView = action
+  }
+
+  /**
+   * Perform the given action after the view is created.
+   *
+   * @param action The action to execute.
+   * @see afterCreateView
+   */
+  fun doAfterCreateView(action: (Parameter<T>) -> Unit) {
+    this.actionBeforeCreateView = action
+  }
+
+  /**
+   * Called before the layout for this widget is created.
+   */
+  open fun beforeCreateView() {
+    this.actionBeforeCreateView?.invoke(this)
+  }
+
+  /**
+   * Called after the layout for this widget is created.
+   */
+  open fun afterCreateView() {
+    this.actionAfterCreateView?.invoke(this)
+  }
+
   private fun notifyObservers() {
     lock.withLock {
       observers.forEach {
@@ -202,7 +256,7 @@ abstract class ParameterBuilder<T> {
 }
 
 class BooleanParameter(@StringRes name: Int, @StringRes description: Int?,
-                       default: Boolean, constraints: List<ParameterConstraint>
+  default: Boolean, constraints: List<ParameterConstraint>
 ) : Parameter<Boolean>(name, description, default, constraints)
 
 class BooleanParameterBuilder : ParameterBuilder<Boolean>() {
@@ -224,12 +278,12 @@ class BooleanParameterBuilder : ParameterBuilder<Boolean>() {
  *     clicked. Click listener to the icon will be set on if this is non-null.
  */
 abstract class TextFieldParameter<T>(@StringRes name: Int,
-                                     @StringRes description: Int?, default: T,
-                                     val startIcon: ((TextFieldParameter<T>) -> Int)?,
-                                     val endIcon: ((TextFieldParameter<T>) -> Int)?,
-                                     val onStartIconClick: View.OnClickListener?,
-                                     val onEndIconClick: View.OnClickListener?,
-                                     constraints: List<ParameterConstraint>
+  @StringRes description: Int?, default: T,
+  val startIcon: ((TextFieldParameter<T>) -> Int)?,
+  val endIcon: ((TextFieldParameter<T>) -> Int)?,
+  val onStartIconClick: View.OnClickListener?,
+  val onEndIconClick: View.OnClickListener?,
+  constraints: List<ParameterConstraint>
 ) : Parameter<T>(name, description, default, constraints)
 
 abstract class TextFieldParameterBuilder<T>(
@@ -240,12 +294,12 @@ abstract class TextFieldParameterBuilder<T>(
 ) : ParameterBuilder<T>()
 
 class StringParameter(@StringRes name: Int, @StringRes description: Int?,
-                      default: String,
-                      startIcon: ((TextFieldParameter<String>) -> Int)?,
-                      endIcon: ((TextFieldParameter<String>) -> Int)?,
-                      onStartIconClick: View.OnClickListener?,
-                      onEndIconClick: View.OnClickListener?,
-                      constraints: List<ParameterConstraint>
+  default: String,
+  startIcon: ((TextFieldParameter<String>) -> Int)?,
+  endIcon: ((TextFieldParameter<String>) -> Int)?,
+  onStartIconClick: View.OnClickListener?,
+  onEndIconClick: View.OnClickListener?,
+  constraints: List<ParameterConstraint>
 ) : TextFieldParameter<String>(name, description, default, startIcon, endIcon,
   onStartIconClick, onEndIconClick, constraints)
 
@@ -260,14 +314,14 @@ class StringParameterBuilder : TextFieldParameterBuilder<String>() {
 }
 
 class EnumParameter<T : Enum<*>>(@StringRes name: Int,
-                                 @StringRes description: Int?, default: T,
-                                 startIcon: ((TextFieldParameter<T>) -> Int)?,
-                                 endIcon: ((TextFieldParameter<T>) -> Int)?,
-                                 onStartIconClick: View.OnClickListener?,
-                                 onEndIconClick: View.OnClickListener?,
-                                 constraints: List<ParameterConstraint>,
-                                 val displayName: ((T) -> String)? = null,
-                                 val filter: ((T) -> Boolean)? = null
+  @StringRes description: Int?, default: T,
+  startIcon: ((TextFieldParameter<T>) -> Int)?,
+  endIcon: ((TextFieldParameter<T>) -> Int)?,
+  onStartIconClick: View.OnClickListener?,
+  onEndIconClick: View.OnClickListener?,
+  constraints: List<ParameterConstraint>,
+  val displayName: ((T) -> String)? = null,
+  val filter: ((T) -> Boolean)? = null
 ) : TextFieldParameter<T>(name, description, default, startIcon, endIcon,
   onStartIconClick, onEndIconClick, constraints)
 

templates-impl/src/main/java/com/itsaky/androidide/templates/impl/TemplateProviderImpl.kt

@@ -42,9 +42,7 @@ class TemplateProviderImpl : ITemplateProvider {
   private val templates = mutableMapOf<String, Template<*>>()
 
   init {
-    templates().forEach { template ->
-      templates[template.templateId] = template
-    }
+    initializeTemplates()
   }
 
   private fun templates() =
@@ -59,6 +57,12 @@ class TemplateProviderImpl : ITemplateProvider {
       noAndroidXActivityProject(),
       composeActivityProject()
     )
+
+  private fun initializeTemplates() {
+    templates().forEach { template ->
+      templates[template.templateId] = template
+    }
+  }
   //@formatter:on
 
   override fun getTemplates(): List<Template<*>> {
@@ -69,7 +73,12 @@ class TemplateProviderImpl : ITemplateProvider {
     return templates[templateId]
   }
 
-  override fun clear() {
+  override fun reload() {
+    release()
+    initializeTemplates()
+  }
+
+  override fun release() {
     templates.forEach { it.value.release() }
     templates.clear()
   }

templates-impl/src/main/java/com/itsaky/androidide/templates/impl/TemplateWidgetViewProviderImpl.kt

@@ -69,13 +69,21 @@ class TemplateWidgetViewProviderImpl : ITemplateWidgetViewProvider {
 
   override fun <T> createView(context: Context, widget: Widget<T>): View {
     if (widget is ParameterWidget<T>) {
-      widget.parameter.setValue(widget.parameter.value, false)
+      widget.parameter.apply {
+        beforeCreateView()
+        setValue(value, false)
+      }
     }
+
     return when (widget) {
       is TextFieldWidget -> createTextField(context, widget)
       is CheckBoxWidget -> createCheckBox(context, widget)
       is SpinnerWidget -> createSpinner(context, widget)
       else -> throw IllegalArgumentException("Unknown widget type : $widget")
+    }.also {
+      if (widget is ParameterWidget<T>) {
+        widget.parameter.afterCreateView()
+      }
     }
   }