Add introduction section

README.md

@@ -259,8 +259,8 @@ In the `.github/workflows` directory, you can find definitions for the following
 [file:gradle.properties]: ./gradle.properties
 [file:course-info.yaml]: ./course-info.yaml
 [file:courseignore]: .courseignore
-[file:course.lesson.tests]: courseSection/psi/programmingTask/test/Tests.kt
-[file:course.framework.lesson.tests]: ./courseSection/courseFrameworkLesson/programmingTask/test/Tests.kt
+[file:course.lesson.tests]: psiSection/psi/programmingTask/test/Tests.kt
+[file:course.framework.lesson.tests]: psiSection/courseFrameworkLesson/programmingTask/test/Tests.kt
 
 [gradle]: https://gradle.org
 

course-info.yaml

@@ -4,6 +4,7 @@ language: English
 summary: TODO
 programming_language: Kotlin
 content:
-  - courseSection
+  - introductionSection
+  - psiSection
 environment_settings:
   jvm_language_level: JDK_17

introductionSection/section-info.yaml

@@ -0,0 +1,3 @@
+custom_name: Introduction
+content:
+  - welcomeLesson

introductionSection/section-remote-info.yaml

@@ -0,0 +1 @@
+id: 459294228

introductionSection/welcomeLesson/helloHelenaTask/src/main/kotlin/org/jetbrains/academy/plugin/course/dev/welcome/HelloHelena.kt

@@ -0,0 +1,10 @@
+package org.jetbrains.academy.plugin.course.dev.welcome
+
+fun sayHelloHelena(howManyTimes: Int): String {
+    TODO()
+}
+
+fun main() {
+    val howManyTimes = readln().toInt()
+    print(sayHelloHelena(howManyTimes))
+}

introductionSection/welcomeLesson/helloHelenaTask/task-info.yaml

@@ -0,0 +1,7 @@
+type: edu
+custom_name: Hello Helena!
+files:
+  - name: src/main/kotlin/org/jetbrains/academy/plugin/course/dev/welcome/HelloHelena.kt
+    visible: true
+  - name: test/org/jetbrains/academy/plugin/course/dev/welcome/Tests.kt
+    visible: false

introductionSection/welcomeLesson/helloHelenaTask/task.md

@@ -0,0 +1,10 @@
+Hi! My name is Helena. I’m working in the Plugin Development Team. We have just hired a new young developer, Jonsi, so I’ve prepared lots of amazing projects for him to do.
+
+But wait, he has never worked with IntelliJ Platform before?! So well, I’ll try to teach him all important things during one week of his probation.
+
+Say hello to Helena! Add implementation to method `helloHelena` method which should return “Hello, Helena!” given number of times, separated by new line.
+
+<div class="hint">
+
+Use `System.lineSeparator()` to get platform specific new line symbol
+</div>

introductionSection/welcomeLesson/helloHelenaTask/test/org/jetbrains/academy/plugin/course/dev/welcome/Tests.kt

@@ -0,0 +1,28 @@
+package org.jetbrains.academy.plugin.course.dev.welcome
+
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.Parameterized
+
+@RunWith(Parameterized::class)
+class Test(private val howManyTimes: Int) {
+
+    private fun expectedSayHelloHelena(howManyTimes: Int): String {
+        return List(howManyTimes) { "Hello, Helena!" }.joinToString(System.lineSeparator())
+    }
+
+    @Test
+    fun test() {
+        assertEquals(expectedSayHelloHelena(howManyTimes), sayHelloHelena(howManyTimes))
+    }
+
+    companion object {
+        @JvmStatic
+        @Parameterized.Parameters
+        fun data(): List<Int> {
+            return listOf(1, 5, 10, 100)
+        }
+    }
+}

introductionSection/welcomeLesson/helpJonsiTask/src/main/kotlin/org/jetbrains/academy/plugin/course/dev/welcome/HelloJonsi.kt

@@ -0,0 +1,10 @@
+package org.jetbrains.academy.plugin.course.dev.welcome
+
+fun sayHelloJonsi(howManyTimes: Int): String {
+    return List(howManyTimes) { "Hello, Jonsi!" }.joinToString(System.lineSeparator())
+}
+
+fun main() {
+    val howManyTimes = readln().toInt()
+    print(sayHelloJonsi(howManyTimes))
+}

introductionSection/welcomeLesson/helpJonsiTask/task-info.yaml

@@ -0,0 +1,12 @@
+type: choice
+custom_name: Ready to Help Jonsi?
+is_multiple_choice: false
+options:
+  - text: "yes"
+    is_correct: true
+  - text: "no"
+    is_correct: false
+files:
+  - name: src/main/kotlin/org/jetbrains/academy/plugin/course/dev/welcome/HelloJonsi.kt
+    visible: true
+local_check: true

introductionSection/welcomeLesson/helpJonsiTask/task-remote-info.yaml

@@ -0,0 +1 @@
+id: 853483765

introductionSection/welcomeLesson/helpJonsiTask/task.md

@@ -0,0 +1,5 @@
+Hi! My name is Jonsi! It’s my first day at JetBrains, and I’m ready to start! But I’m really nervous of my probation week as I have no idea, how IDE works behind and what is more, how to write plugins for it.
+
+So I really need someone's help!!!
+
+Maybe you can help me?

introductionSection/welcomeLesson/lesson-info.yaml

@@ -0,0 +1,4 @@
+custom_name: Welcome and good luck!
+content:
+  - helloHelenaTask
+  - helpJonsiTask

psiSection/introductionToPsiLesson/IntroToPsiLesson/task-remote-info.yaml

@@ -0,0 +1 @@
+id: 853483765

courseSection/introductionToPsiLesson/IntroToPsiLesson/task.md → psiSection/introductionToPsiLesson/IntroToPsiLesson/task.md

@@ -5,20 +5,20 @@ As you probably read there, PSI represents the entire structure of the code in a
 called a PSI tree.
 
 ### PSI Tree Structure
-* The root is a [`PSI File`](https://plugins.jetbrains.com/docs/intellij/psi-files.html) element, representing an entire file.
+* The root is a [`PSI File`](https://plugins.jetbrains.com/docs/intellij/psi-files.html) element, representing an entire file
 * Each node or [`PSI Element`](https://plugins.jetbrains.com/docs/intellij/psi-elements.html) in the tree represents a syntactic or structural part of the code, like expressions, 
-* statements, and declarations.
+statements, and declarations
 
 ### Types of PSI Elements
-* PsiFile: Represents an entire file.
-* PsiClass: Represents a class in the code.
-* PsiMethod: Represents a method.
-* PsiVariable: Represents a variable.
-* PsiExpression: Represents an expression, and so on.
+* PsiFile: Represents an entire file
+* PsiClass: Represents a class in the code
+* PsiMethod: Represents a method
+* PsiVariable: Represents a variable
+* PsiExpression: Represents an expression, and so on
 
-Each language (Java/Kotlin/Python) has their own implementations of [`PsiElement`](https://github.com/JetBrains/intellij-community/blob/master/platform/core-api/src/com/intellij/psi/PsiElement.java), 
+Each language (Java, Kotlin, Python, etc.) has their own implementations of [`PsiElement`](https://github.com/JetBrains/intellij-community/blob/master/platform/core-api/src/com/intellij/psi/PsiElement.java), 
 so for example for file abstraction there are following options:
-* [`com.intellij.psi.PsiFile`](https://github.com/JetBrains/intellij-community/blob/idea/232.10227.8/platform/core-api/src/com/intellij/psi/PsiFile.java): Represents an Java file.
-* [`org.jetbrains.kotlin.psi.KtFile`](https://github.com/JetBrains/kotlin/blob/master/compiler/psi/src/org/jetbrains/kotlin/psi/KtFile.kt): Represents a Kotlin file.
-* [`com.jetbrains.python.psi.PyFile`](https://github.com/JetBrains/intellij-community/blob/master/python/python-psi-api/src/com/jetbrains/python/psi/PyFile.java#L28): Represents a Python file.
+* [`com.intellij.psi.PsiFile`](https://github.com/JetBrains/intellij-community/blob/idea/232.10227.8/platform/core-api/src/com/intellij/psi/PsiFile.java): Represents an Java file
+* [`org.jetbrains.kotlin.psi.KtFile`](https://github.com/JetBrains/kotlin/blob/master/compiler/psi/src/org/jetbrains/kotlin/psi/KtFile.kt): Represents a Kotlin file
+* [`com.jetbrains.python.psi.PyFile`](https://github.com/JetBrains/intellij-community/blob/master/python/python-psi-api/src/com/jetbrains/python/psi/PyFile.java#L28): Represents a Python file
 

courseSection/introductionToPsiLesson/TryPsiViewerLesson/task-info.yaml → psiSection/introductionToPsiLesson/TryPsiViewerLesson/task-info.yaml

@@ -1,5 +1,5 @@
 type: choice
-custom_name: Try PS Viewer
+custom_name: Try PSI Viewer
 is_multiple_choice: true
 options:
   - text: org.jetbrains.kotlin.psi.KtClass