Feat: Add initial Gist tools

pkg/github/gists.go

@@ -0,0 +1,247 @@
+package github
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+
+	"github.com/github/github-mcp-server/pkg/translations"
+	"github.com/google/go-github/v69/github"
+	"github.com/mark3labs/mcp-go/mcp"
+	"github.com/mark3labs/mcp-go/server"
+)
+
+// ListGists creates a tool to list gists for a user
+func ListGists(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
+	return mcp.NewTool("list_gists",
+			mcp.WithDescription(t("TOOL_LIST_GISTS_DESCRIPTION", "List gists for a user")),
+			mcp.WithString("username",
+				mcp.Description("GitHub username (omit for authenticated user's gists)"),
+			),
+			mcp.WithString("since",
+				mcp.Description("Only gists updated after this time (ISO 8601 timestamp)"),
+			),
+			WithPagination(),
+		),
+		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+			username, err := OptionalParam[string](request, "username")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			since, err := OptionalParam[string](request, "since")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			pagination, err := OptionalPaginationParams(request)
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			opts := &github.GistListOptions{
+				ListOptions: github.ListOptions{
+					Page:    pagination.page,
+					PerPage: pagination.perPage,
+				},
+			}
+
+			// Parse since timestamp if provided
+			if since != "" {
+				sinceTime, err := parseISOTimestamp(since)
+				if err != nil {
+					return mcp.NewToolResultError(fmt.Sprintf("invalid since timestamp: %v", err)), nil
+				}
+				opts.Since = sinceTime
+			}
+
+			client, err := getClient(ctx)
+			if err != nil {
+				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
+			}
+
+			gists, resp, err := client.Gists.List(ctx, username, opts)
+			if err != nil {
+				return nil, fmt.Errorf("failed to list gists: %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 list gists: %s", string(body))), nil
+			}
+
+			r, err := json.Marshal(gists)
+			if err != nil {
+				return nil, fmt.Errorf("failed to marshal response: %w", err)
+			}
+
+			return mcp.NewToolResultText(string(r)), nil
+		}
+}
+
+// CreateGist creates a tool to create a new gist
+func CreateGist(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
+	return mcp.NewTool("create_gist",
+			mcp.WithDescription(t("TOOL_CREATE_GIST_DESCRIPTION", "Create a new gist")),
+			mcp.WithString("description",
+				mcp.Description("Description of the gist"),
+			),
+			mcp.WithString("filename",
+				mcp.Required(),
+				mcp.Description("Filename for simple single-file gist creation"),
+			),
+			mcp.WithString("content",
+				mcp.Required(),
+				mcp.Description("Content for simple single-file gist creation"),
+			),
+			mcp.WithBoolean("public",
+				mcp.Description("Whether the gist is public"),
+				mcp.DefaultBool(false),
+			),
+		),
+		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+			description, err := OptionalParam[string](request, "description")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			filename, err := requiredParam[string](request, "filename")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			content, err := requiredParam[string](request, "content")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			public, err := OptionalParam[bool](request, "public")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			files := make(map[github.GistFilename]github.GistFile)
+			files[github.GistFilename(filename)] = github.GistFile{
+				Filename: github.Ptr(filename),
+				Content:  github.Ptr(content),
+			}
+
+			gist := &github.Gist{
+				Files:       files,
+				Public:      github.Ptr(public),
+				Description: github.Ptr(description),
+			}
+
+			client, err := getClient(ctx)
+			if err != nil {
+				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
+			}
+
+			createdGist, resp, err := client.Gists.Create(ctx, gist)
+			if err != nil {
+				return nil, fmt.Errorf("failed to create gist: %w", err)
+			}
+			defer func() { _ = resp.Body.Close() }()
+
+			if resp.StatusCode != http.StatusCreated {
+				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 create gist: %s", string(body))), nil
+			}
+
+			r, err := json.Marshal(createdGist)
+			if err != nil {
+				return nil, fmt.Errorf("failed to marshal response: %w", err)
+			}
+
+			return mcp.NewToolResultText(string(r)), nil
+		}
+}
+
+// UpdateGist creates a tool to edit an existing gist
+func UpdateGist(getClient GetClientFn, t translations.TranslationHelperFunc) (tool mcp.Tool, handler server.ToolHandlerFunc) {
+	return mcp.NewTool("update_gist",
+			mcp.WithDescription(t("TOOL_UPDATE_GIST_DESCRIPTION", "Update an existing gist")),
+			mcp.WithString("gist_id",
+				mcp.Required(),
+				mcp.Description("ID of the gist to update"),
+			),
+			mcp.WithString("description",
+				mcp.Description("Updated description of the gist"),
+			),
+			mcp.WithString("filename",
+				mcp.Required(),
+				mcp.Description("Filename to update or create"),
+			),
+			mcp.WithString("content",
+				mcp.Required(),
+				mcp.Description("Content for the file"),
+			),
+		),
+		func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
+			gistID, err := requiredParam[string](request, "gist_id")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			description, err := OptionalParam[string](request, "description")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			filename, err := requiredParam[string](request, "filename")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			content, err := requiredParam[string](request, "content")
+			if err != nil {
+				return mcp.NewToolResultError(err.Error()), nil
+			}
+
+			files := make(map[github.GistFilename]github.GistFile)
+			files[github.GistFilename(filename)] = github.GistFile{
+				Filename: github.Ptr(filename),
+				Content:  github.Ptr(content),
+			}
+
+			gist := &github.Gist{
+				Files:       files,
+				Description: github.Ptr(description),
+			}
+
+			client, err := getClient(ctx)
+			if err != nil {
+				return nil, fmt.Errorf("failed to get GitHub client: %w", err)
+			}
+
+			updatedGist, resp, err := client.Gists.Edit(ctx, gistID, gist)
+			if err != nil {
+				return nil, fmt.Errorf("failed to update gist: %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 gist: %s", string(body))), nil
+			}
+
+			r, err := json.Marshal(updatedGist)
+			if err != nil {
+				return nil, fmt.Errorf("failed to marshal response: %w", err)
+			}
+
+			return mcp.NewToolResultText(string(r)), nil
+		}
+}