func UpdateIssue()

in pkg/github/issues.go [556:699]
129 lines of code
21 McCabe index (conditional complexity)

func UpdateIssue(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
	return mcp.NewTool("update_issue",
			mcp.WithDescription(t("TOOL_UPDATE_ISSUE_DESCRIPTION", "Update an existing issue in a GitHub repository.")),
			mcp.WithToolAnnotation(mcp.ToolAnnotation{
				Title:        t("TOOL_UPDATE_ISSUE_USER_TITLE", "Edit issue"),
				ReadOnlyHint: false,
			}),
			mcp.WithString("owner",
				mcp.Required(),
				mcp.Description("Repository owner"),
			),
			mcp.WithString("repo",
				mcp.Required(),
				mcp.Description("Repository name"),
			),
			mcp.WithNumber("issue_number",
				mcp.Required(),
				mcp.Description("Issue number to update"),
			),
			mcp.WithString("title",
				mcp.Description("New title"),
			),
			mcp.WithString("body",
				mcp.Description("New description"),
			),
			mcp.WithString("state",
				mcp.Description("New state"),
				mcp.Enum("open", "closed"),
			),
			mcp.WithArray("labels",
				mcp.Description("New labels"),
				mcp.Items(
					map[string]interface{}{
						"type": "string",
					},
				),
			),
			mcp.WithArray("assignees",
				mcp.Description("New assignees"),
				mcp.Items(
					map[string]interface{}{
						"type": "string",
					},
				),
			),
			mcp.WithNumber("milestone",
				mcp.Description("New milestone number"),
			),
		),
		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
			owner, err := requiredParam[string](request, "owner")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			repo, err := requiredParam[string](request, "repo")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			issueNumber, err := RequiredInt(request, "issue_number")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}

			// Create the issue request with only provided fields
			issueRequest := &github.IssueRequest{}

			// Set optional parameters if provided
			title, err := OptionalParam[string](request, "title")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if title != "" {
				issueRequest.Title = github.Ptr(title)
			}

			body, err := OptionalParam[string](request, "body")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if body != "" {
				issueRequest.Body = github.Ptr(body)
			}

			state, err := OptionalParam[string](request, "state")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if state != "" {
				issueRequest.State = github.Ptr(state)
			}

			// Get labels
			labels, err := OptionalStringArrayParam(request, "labels")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if len(labels) > 0 {
				issueRequest.Labels = &labels
			}

			// Get assignees
			assignees, err := OptionalStringArrayParam(request, "assignees")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if len(assignees) > 0 {
				issueRequest.Assignees = &assignees
			}

			milestone, err := OptionalIntParam(request, "milestone")
			if err != nil {
				return mcp.NewToolResultError(err.Error()), nil
			}
			if milestone != 0 {
				milestoneNum := milestone
				issueRequest.Milestone = &milestoneNum
			}

			client, err := getClient(ctx)
			if err != nil {
				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
			}
			updatedIssue, resp, err := client.Issues.Edit(ctx, owner, repo, issueNumber, issueRequest)
			if err != nil {
				return nil, fmt.Errorf("failed to update issue: %w", err)
			}
			defer func() { _ = resp.Body.Close() }()

			if resp.StatusCode != http.StatusOK {
				body, err := io.ReadAll(resp.Body)
				if err != nil {
					return nil, fmt.Errorf("failed to read response body: %w", err)
				}
				return mcp.NewToolResultError(fmt.Sprintf("failed to update issue: %s", string(body))), nil
			}

			r, err := json.Marshal(updatedIssue)
			if err != nil {
				return nil, fmt.Errorf("failed to marshal response: %w", err)
			}

			return mcp.NewToolResultText(string(r)), nil
		}
}