feat: add CodeSnippets for main, for and foreach

LanguageServer/src/main/java/com/dhbw/JavaTXTextDocumentService.java

@@ -1,6 +1,8 @@
 package com.dhbw;
 
+import com.dhbw.helper.CodeSnippetOptions;
 import com.dhbw.model.ParseError.DiagnoseErrorListener;
+import com.dhbw.model.SnippetWithName;
 import com.dhbw.parser.Java17Lexer;
 import com.dhbw.parser.Java17Parser;
 import com.dhbw.parser.Java17ParserBaseListener;
@@ -26,6 +28,8 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
 
     String currentTextDocument;
 
+    CodeSnippetOptions codeSnippetOptions = new CodeSnippetOptions();
+
     public void setClient(LanguageClient client) {
         this.client = client;
     }
@@ -34,11 +38,13 @@ public class JavaTXTextDocumentService implements org.eclipse.lsp4j.services.Tex
     public CompletableFuture<Either<List<CompletionItem>, CompletionList>> completion(CompletionParams params) {
         List<CompletionItem> completions = new ArrayList<>();
 
-        CompletionItem item = new CompletionItem("HelloWorld");
-        item.setKind(CompletionItemKind.Text);
-        item.setInsertText("Hello, JavaTX World!");
-        completions.add(item);
 
+        for(SnippetWithName elem : codeSnippetOptions.getSnippets()) {
+            CompletionItem item = new CompletionItem(elem.getName());
+            item.setKind(CompletionItemKind.Text);
+            item.setInsertText(elem.getSnippet());
+            completions.add(item);
+        }
         client.showMessage(new MessageParams(MessageType.Info, "Returning completion suggestions: " + completions));
 
         return CompletableFuture.completedFuture(Either.forLeft(completions));

LanguageServer/src/main/java/com/dhbw/helper/CodeSnippetOptions.java

@@ -0,0 +1,31 @@
+package com.dhbw.helper;
+
+import com.dhbw.model.SnippetWithName;
+
+import java.util.ArrayList;
+
+public class CodeSnippetOptions {
+    private ArrayList<SnippetWithName> snippets = new ArrayList<>();
+
+    public CodeSnippetOptions() {
+        snippets.add(getMainSnippet());
+        snippets.add(getForLoopSnippet());
+        snippets.add(getForEachSnippet());
+    }
+
+    public SnippetWithName getMainSnippet(){
+        return new SnippetWithName("main", "public main(args){\n System.out.println(\"Hello World\");\n}\n");
+    }
+
+    public SnippetWithName getForLoopSnippet(){
+        return new SnippetWithName("forLoop", "for(i = 0; i < list.size(); i++){\n\n}");
+    }
+
+    public SnippetWithName getForEachSnippet(){
+        return new SnippetWithName("forEachLoop", "for(el : list){\n\n}");
+    }
+
+    public ArrayList<SnippetWithName> getSnippets() {
+        return snippets;
+    }
+}

LanguageServer/src/main/java/com/dhbw/model/SnippetWithName.java

@@ -0,0 +1,27 @@
+package com.dhbw.model;
+
+public class SnippetWithName {
+    private String name;
+    private String snippet;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getSnippet() {
+        return snippet;
+    }
+
+    public void setSnippet(String snippet) {
+        this.snippet = snippet;
+    }
+
+    public SnippetWithName(String name, String snippet) {
+        this.name = name;
+        this.snippet = snippet;
+    }
+}