LSP-server-example

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package handlers
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import (
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	"encoding/json"
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	"log/slog"
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	"lsp-server/internal/protocol"
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)
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const DidChangeTextDocumentNotification = "textDocument/didChange"
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type DidChange struct {
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	documentUpdates chan protocol.TextDocumentItem
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}
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func NewDidChange(documentUpdates chan protocol.TextDocumentItem) *DidChange {
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	return &DidChange{documentUpdates: documentUpdates}
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}
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func (d DidChange) Call(params json.RawMessage) error {
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	slog.Info("received didChange notification")
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	changeParams, err := d.parseParams(params)
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	if err != nil {
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		slog.Error("Error to parse didChange params")
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		return err
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	}
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	slog.Debug("didChange params", slog.Any("params", *changeParams))
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	d.documentUpdates <- protocol.TextDocumentItem{
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		URI:     changeParams.TextDocument.URI,
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		Version: changeParams.TextDocument.Version,
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		Text:    changeParams.ContentChanges[0].Text,
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	}
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	return nil
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}
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func (d DidChange) parseParams(params json.RawMessage) (*protocol.DidChangeTextDocumentParams, error) {
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	var changeParams protocol.DidChangeTextDocumentParams
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	if err := json.Unmarshal(params, &changeParams); err != nil {
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		return nil, err
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	}
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	return &changeParams, nil
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}
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