sort methods done

courseSection/psi/addPSI/src/Task.kt

@@ -0,0 +1,24 @@
+import com.intellij.openapi.command.WriteCommandAction
+import com.intellij.psi.PsiFile
+import com.intellij.psi.util.PsiTreeUtil
+import org.jetbrains.kotlin.psi.KtClass
+import org.jetbrains.kotlin.psi.KtNamedFunction
+
+
+// type your solution here
+
+fun sortMethods(psiFile: PsiFile) {
+    val project = psiFile.project
+    WriteCommandAction.runWriteCommandAction(project) {
+        val classes = PsiTreeUtil.findChildrenOfType(psiFile, KtClass::class.java)
+
+        for (ktClass in classes){
+            val methods = ktClass.declarations.filterIsInstance<KtNamedFunction>()
+            val sortedMethods = methods.sortedBy { it.name }.map { it.copy() as KtNamedFunction }
+
+            methods.zip(sortedMethods).forEach { (original, sortedCopy) ->
+                original.replace(sortedCopy)
+            }
+        }
+    }
+}

courseSection/psi/addPSI/task-info.yaml

@@ -0,0 +1,6 @@
+type: edu
+files:
+  - name: src/Task.kt
+    visible: true
+  - name: test/Tests.kt
+    visible: false

courseSection/psi/addPSI/task.md

@@ -0,0 +1,48 @@
+
+This is a task description file.
+Its content will be displayed to a learner
+in the **Task Description** window.
+
+It supports both Markdown and HTML.
+To toggle the format, you can rename **task.md**
+to **task.html**, or vice versa.
+The default task description format can be changed
+in **Preferences | Tools | Education**,
+but this will not affect any existing task description files.
+
+The following features are available in
+**task.md/task.html** which are specific to the JetBrains Academy plugin:
+
+- Hints can be added anywhere in the task text.
+  Type "hint" and press Tab.
+  Hints should be added to an empty line in the task text.
+  In hints you can use both HTML and Markdown.
+<div class="hint">
+
+Text of your hint
+
+</div>
+
+- You may need to refer your learners to a particular lesson,
+task, or file. To achieve this, you can use the in-course links.
+Specify the path using the `[link_text](course://lesson1/task1/file1)` format.
+
+- You can insert shortcuts in the task description.
+While **task.html/task.md** is open, right-click anywhere
+on the **Editor** tab and choose the **Insert shortcut** option
+from the context menu.
+For example: &shortcut:FileStructurePopup;.
+
+- Insert the &percnt;`IDE_NAME`&percnt; macro,
+which will be replaced by the actual IDE name.
+For example, **%IDE_NAME%**.
+
+- Insert PSI elements, by using links like
+`[element_description](psi_element://link.to.element)`.
+To get such a link, right-click the class or method
+and select **Copy Reference**.
+Then press &shortcut:EditorPaste; to insert the link where appropriate.
+For example, a [link to the "contains" method](psi_element://java.lang.String#contains).
+
+- You can add link to file using **full path** like this:
+  `[file_link](file://lesson1/task1/file.txt)`.

courseSection/psi/addPSI/test/Tests.kt

@@ -0,0 +1,35 @@
+import com.intellij.psi.util.PsiTreeUtil
+import com.intellij.testFramework.fixtures.BasePlatformTestCase
+import org.jetbrains.kotlin.psi.KtClass
+import org.jetbrains.kotlin.psi.KtNamedFunction
+
+class Test : BasePlatformTestCase() {
+
+    fun testSolution() {
+        var file = myFixture.configureByText("MyClass.kt", """
+            class MyClass {
+                fun abcd() {
+                    println("Hello")
+                }
+                
+                fun zhas() {
+                    println("Goodbye")
+                }
+                
+                fun mid() {
+                    println("Goodbye")
+                }
+            }
+            
+        """.trimIndent())
+
+        sortMethods(file)
+        val classes = PsiTreeUtil.findChildrenOfType(file, KtClass::class.java)
+
+        for (ktClass in classes){
+            val methods = ktClass.declarations.filterIsInstance<KtNamedFunction>()
+            val sorted = methods.sortedBy { it.name }
+            assertEquals(sorted, methods)
+        }
+    }
+}

courseSection/psi/lesson-info.yaml

@@ -5,3 +5,4 @@ content:
   - Accessing PSI Elements
   - Count number of classes
   - editPSI
+  - addPSI