Refactoring: move channels titles and urls to single place

idea/src/org/jetbrains/kotlin/idea/configuration/KotlinLanguageConfiguration.kt

@@ -19,23 +19,32 @@ class KotlinUpdatesSettingsConfigurable : SearchableConfigurable, Configurable.N
     companion object {
         const val ID = "preferences.language.Kotlin"
 
-        private fun saveSelectedChannel(channel: Int) {
+        private fun saveSelectedChannel(channelOrdinal: Int) {
             val hosts = UpdateSettings.getInstance().storedPluginHosts
             hosts.removeIf {
                 it.startsWith("https://plugins.jetbrains.com/plugins/") &&
                         (it.endsWith("/6954") || it.endsWith(KotlinPluginUtil.KOTLIN_PLUGIN_ID.idString))
             }
 
-            EAPChannels.values().find { it.uiIndex == channel }?.let { eapChannel ->
-                hosts.add(eapChannel.url)
+            UpdateChannel.values().find { it.ordinal == channelOrdinal }?.let { eapChannel ->
+                if (eapChannel != UpdateChannel.STABLE) {
+                    hosts.add(eapChannel.url ?: error("Shouldn't add null urls to custom repositories"))
+                }
             }
         }
 
-        enum class EAPChannels(val url: String, val uiIndex: Int) {
-            EAP("https://plugins.jetbrains.com/plugins/eap/${KotlinPluginUtil.KOTLIN_PLUGIN_ID.idString}", 1),
-            EAP_NEXT("https://plugins.jetbrains.com/plugins/eap-next/${KotlinPluginUtil.KOTLIN_PLUGIN_ID.idString}", 2);
+        enum class UpdateChannel(val url: String?, val title: String) {
+            STABLE(null, "Stable"),
+            EAP("https://plugins.jetbrains.com/plugins/eap/${KotlinPluginUtil.KOTLIN_PLUGIN_ID.idString}", "Early Access Preview 1.3.x"),
+            EAP_NEXT(
+                "https://plugins.jetbrains.com/plugins/eap-next/${KotlinPluginUtil.KOTLIN_PLUGIN_ID.idString}",
+                "Early Access Preview 1.4.x"
+            );
 
-            fun isInHosts() = url in UpdateSettings.getInstance().pluginHosts
+            fun isInHosts(): Boolean {
+                if (this == STABLE) return false
+                return url in UpdateSettings.getInstance().pluginHosts
+            }
         }
     }
 
@@ -108,7 +117,9 @@ class KotlinUpdatesSettingsConfigurable : SearchableConfigurable, Configurable.N
             }
         }
 
-        savedChannel = EAPChannels.values().find { it.isInHosts() }?.uiIndex ?: 0
+        form.initChannels(UpdateChannel.values().map { it.title })
+
+        savedChannel = UpdateChannel.values().find { it.isInHosts() }?.ordinal ?: 0
         form.channelCombo.selectedIndex = savedChannel
 
         form.channelCombo.addActionListener {

idea/src/org/jetbrains/kotlin/idea/configuration/ui/ConfigurePluginUpdatesForm.form

@@ -80,13 +80,7 @@
         <children>
           <component id="ca1a9" class="javax.swing.JComboBox" binding="channelCombo">
             <constraints/>
-            <properties>
-              <model>
-                <item value="Stable"/>
-                <item value="Early Access Preview 1.3.x"/>
-                <item value="Early Access Preview 1.4.x"/>
-              </model>
-            </properties>
+            <properties/>
           </component>
           <component id="c7546" class="javax.swing.JButton" binding="reCheckButton">
             <constraints/>

idea/src/org/jetbrains/kotlin/idea/configuration/ui/ConfigurePluginUpdatesForm.java

@@ -10,6 +10,7 @@ import com.intellij.util.ui.AsyncProcessIcon;
 import org.jetbrains.kotlin.idea.KotlinPluginUtil;
 
 import javax.swing.*;
+import java.util.List;
 
 public class ConfigurePluginUpdatesForm {
     public JComboBox<String> channelCombo;
@@ -23,6 +24,16 @@ public class ConfigurePluginUpdatesForm {
     private JTextPane currentVersion;
 
     public ConfigurePluginUpdatesForm() {
+        showVerifierDisabledStatus();
+        currentVersion.setText(KotlinPluginUtil.getPluginVersion());
+    }
+
+    public void initChannels(List<String> channels) {
+        channelCombo.removeAllItems();
+        for (String channel : channels) {
+            channelCombo.addItem(channel);
+        }
+
         int size = channelCombo.getModel().getSize();
         String maxLengthItem = "";
         for (int i = 0; i < size; i++) {
@@ -32,8 +43,6 @@ public class ConfigurePluginUpdatesForm {
             }
         }
         channelCombo.setPrototypeDisplayValue(maxLengthItem + " ");
-        showVerifierDisabledStatus();
-        currentVersion.setText(KotlinPluginUtil.getPluginVersion());
     }
 
     private void createUIComponents() {