feat: initial support for the Pact Language Server (LSP) (#26)

* feat(ide): add a Pact file template

Signed-off-by: Luke Gareth Ribchester <luke@luke.gr>

* feat(lsp): handle path configuration changes

Signed-off-by: Luke Gareth Ribchester <luke@luke.gr>

* docs(changelog): add entry

Signed-off-by: Luke Gareth Ribchester <luke@luke.gr>

* 0.1.0

Signed-off-by: Luke Gareth Ribchester <luke@luke.gr>

---------

Signed-off-by: Luke Gareth Ribchester <luke@luke.gr>

CHANGELOG.md

@@ -4,4 +4,4 @@
 
 ## [Unreleased]
 ### Added
-- Initial scaffold created from [IntelliJ Platform Plugin Template](https://github.com/JetBrains/intellij-platform-plugin-template)
+- Initial support for the [Pact Language Server (LSP)](https://github.com/kadena-io/pact-lsp)

gradle.properties

@@ -4,7 +4,7 @@ pluginGroup = io.kadena.pact
 pluginName = Pact
 pluginRepositoryUrl = https://github.com/lukeribchester/pact-intellij
 # SemVer format -> https://semver.org
-pluginVersion = 0.0.7-alpha
+pluginVersion = 0.1.0
 
 # Supported build number ranges and IntelliJ Platform versions -> https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 pluginSinceBuild = 232

src/main/kotlin/io/kadena/pact/ide/settings/AppSettingsConfigurable.kt

@@ -36,6 +36,7 @@ internal class AppSettingsConfigurable : Configurable {
         val settings: AppSettingsState = AppSettingsState.instance
         settings.pactPath = appSettingsComponent?.pactPath.toString()
         settings.pactLanguageServerPath = appSettingsComponent?.pactLanguageServerPath.toString()
+        settings.notifyAppSettingsStateChanged(settings)
     }
 
     override fun reset() {

src/main/kotlin/io/kadena/pact/ide/settings/AppSettingsState.kt

@@ -18,10 +18,12 @@ import org.jetbrains.annotations.Nullable
     name = "io.kadena.pact.ide.settings.AppSettingsState",
     storages = [Storage("PactPlugin.xml")]
 )
-internal class AppSettingsState : PersistentStateComponent<AppSettingsState> {
+class AppSettingsState : PersistentStateComponent<AppSettingsState> {
     var pactPath: String = ""
     var pactLanguageServerPath: String = ""
 
+    private val listeners = mutableSetOf<AppSettingsStateListener>()
+
     @Nullable
     override fun getState(): AppSettingsState {
         return this
@@ -35,4 +37,18 @@ internal class AppSettingsState : PersistentStateComponent<AppSettingsState> {
         val instance: AppSettingsState
             get() = ApplicationManager.getApplication().getService(AppSettingsState::class.java)
     }
+
+    fun addAppSettingsStateListener(listener: AppSettingsStateListener) {
+        listeners.add(listener)
+    }
+
+    fun notifyAppSettingsStateChanged(state: AppSettingsState) {
+        for (listener in listeners) {
+            listener.onAppSettingsStateChanged(state)
+        }
+    }
+
+    interface AppSettingsStateListener {
+        fun onAppSettingsStateChanged(state: AppSettingsState)
+    }
 }

src/main/kotlin/io/kadena/pact/lsp/PactLspServerSupportProvider.kt

@@ -2,16 +2,38 @@ package io.kadena.pact.lsp
 
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.vfs.VirtualFile
+import com.intellij.platform.lsp.api.LspServerManager
 import com.intellij.platform.lsp.api.LspServerSupportProvider
+import io.kadena.pact.ide.settings.AppSettingsState
+
+class PactLspServerSupportProvider : LspServerSupportProvider, AppSettingsState.AppSettingsStateListener {
+
+    private var _project: Project? = null
+
+    init {
+        val settings = AppSettingsState.instance
+        settings.addAppSettingsStateListener(this)
+    }
 
-class PactLspServerSupportProvider : LspServerSupportProvider {
     override fun fileOpened(
         project: Project,
         file: VirtualFile,
         serverStarter: LspServerSupportProvider.LspServerStarter
     ) {
         if (file.extension == "pact") {
+            _project = project
             serverStarter.ensureServerStarted(PactLspServerDescriptor(project))
         }
     }
+
+    override fun onAppSettingsStateChanged(state: AppSettingsState) {
+        restart()
+    }
+
+    private fun restart() {
+        _project?.let { project ->
+            val server = LspServerManager.getInstance(project)
+            server.stopAndRestartIfNeeded(PactLspServerSupportProvider::class.java)
+        }
+    }
 }