implemented diagnostics

Author: s-ayush2903

analysis/state.go

@@ -20,12 +20,14 @@ func NewState() State {
     }
 }
 
-func (state *State) OpenDocument(path string, contents string) {
+func (state *State) OpenDocument(logger *log.Logger, path string, contents string) [] lsp.Diagnostic {
     state.Documents[path] = contents
+    return getDiagnostics(logger, contents)
 }
 
-func (state *State) UpdateDocument(path string, contents string) {
+func (state *State) UpdateDocument(logger *log.Logger, path string, contents string) [] lsp.Diagnostic {
     state.Documents[path] = contents
+    return getDiagnostics(logger, contents)
 }
 
 func (state *State) Hover(id int, path string) lsp.HoverResponse {
@@ -126,6 +128,24 @@ func (state *State) Completion(logger *log.Logger, id int, filePath string) lsp.
     return completionsResponse
 }
 
+func getDiagnostics(logger *log.Logger, contents string) [] lsp.Diagnostic {
+    diagnostics := [] lsp.Diagnostic{}
+    logger.Printf("DIAGNOSTIC content %s", contents)
+    for row, line := range strings.Split(contents, "\n") {
+        if strings.Contains(line, "VS Code") {
+            idx := strings.Index(line, "VS Code")
+            logger.Print("-------------FOUND FOUND FOUND-------------")
+            diagnostics = append(diagnostics, lsp.Diagnostic{
+                Range: LineRange(row, idx, idx + len("VS Code")),
+                Serverity: 1,
+                Source: "Elitism",
+                Message: "One should ALWAYS use superior editors ONLY",
+            })
+        }
+    }
+    return diagnostics
+}
+
 func LineRange (line, start, end int) lsp.Range {
     return lsp.Range{
         Start: lsp.Position{Line: line, Character: start},

lsp/textDocument_codeActionRequest.go

@@ -30,9 +30,6 @@ type Kind struct {
     Refactor string
 }
 
-type Diagnostic struct {
-}
-
 type Command struct {
     Title string `json:"title"`
     Command string `json:"command"`

lsp/textDocument_diagnostics.go

@@ -0,0 +1,19 @@
+package lsp
+
+type PublishDiagnosticsNotification struct {
+    Notification
+    Params PublishDiagnosticParams `json:"params"`
+}
+
+type PublishDiagnosticParams struct {
+    URI string 
+    Diagnostics []Diagnostic `json:"diagnostics"`
+}
+
+type Diagnostic struct {
+    Source string `json:"source"`
+    Message string `json:"message"`
+    Serverity int `json:"severity"`
+    Range Range `json:"range"`
+}
+

main.go

@@ -67,7 +67,18 @@ func handleMessage(logger *log.Logger, writer io.Writer, state analysis.State, m
             logger.Printf("[textdoc/didOpen]received contents cannot be parsed : %s %s", content,  err)
         }
         logger.Printf("[textdoc/didOpen] OPENED loaded file at: [ %s ]", request.DidOpenTextDocumentParams.TextDocumentItem.Uri)
-        state.OpenDocument(request.DidOpenTextDocumentParams.TextDocumentItem.Uri, request.DidOpenTextDocumentParams.TextDocumentItem.Text)
+
+		diagnostics := state.OpenDocument(logger, request.DidOpenTextDocumentParams.TextDocumentItem.Uri, request.DidOpenTextDocumentParams.TextDocumentItem.Text)
+		writeResponse(logger, lsp.PublishDiagnosticsNotification{
+			Notification: lsp.Notification{
+				RPC:    "2.0",
+				Method: "textDocument/publishDiagnostics",
+			},
+			Params: lsp.PublishDiagnosticParams{
+				URI:         request.DidOpenTextDocumentParams.TextDocumentItem.Uri,
+				Diagnostics: diagnostics,
+			},
+		}, writer)
 
     case "textDocument/didChange":
         var request lsp.DidChangeTextDocumentNotification
@@ -77,7 +88,19 @@ func handleMessage(logger *log.Logger, writer io.Writer, state analysis.State, m
         logger.Printf("[textdoc/didChange] UPDATED loaded file at: [ %s ]", request.Params.TextDocument.Uri)
 
         for _, change := range request.Params.Changes {
-            state.UpdateDocument(request.Params.TextDocument.Uri, change.Text)
+            diagnostics := state.UpdateDocument(logger, request.Params.TextDocument.Uri, change.Text)
+            writeResponse(logger, lsp.PublishDiagnosticsNotification{
+                    Notification: lsp.Notification{
+                        RPC: "2.0",
+                        Method: "textDocument/publishDiagnostics",
+                    },
+                    Params: lsp.PublishDiagnosticParams {
+                        URI: request.Params.TextDocument.Uri,
+                        Diagnostics: diagnostics,
+                    },
+                },
+            writer,
+            )
         }
 
     case "textDocument/hover":

readme.md

@@ -3,3 +3,4 @@ helloooo
 heyyDidOpenTextDocumentParams
 
 VS C*de is an excellent editor
+VS Code neovim Neovim