mcp: refactors pkg for easy maintainability (knative#2928)

Signed-off-by: kapil <[email protected]>

Author: KapilSareen

pkg/mcp/help.go

@@ -0,0 +1,82 @@
+package mcp
+
+import (
+	"context"
+	"fmt"
+	"os/exec"
+
+	"github.com/mark3labs/mcp-go/mcp"
+)
+
+func handleRootHelpResource(ctx context.Context, request mcp.ReadResourceRequest) ([]mcp.ResourceContents, error) {
+	content, err := exec.Command("func", "--help").Output()
+	if err != nil {
+		return nil, err
+	}
+
+	return []mcp.ResourceContents{
+		mcp.TextResourceContents{
+			URI:      "func://docs",
+			MIMEType: "text/plain",
+			Text:     string(content),
+		},
+	}, nil
+}
+
+func runHelpCommand(args []string, uri string) ([]mcp.ResourceContents, error) {
+	args = append(args, "--help")
+	content, err := exec.Command("func", args...).Output()
+	if err != nil {
+		return nil, err
+	}
+	return []mcp.ResourceContents{
+		mcp.TextResourceContents{
+			URI:      uri,
+			MIMEType: "text/plain",
+			Text:     string(content),
+		},
+	}, nil
+}
+
+func handleCmdHelpPrompt(ctx context.Context, request mcp.GetPromptRequest) (*mcp.GetPromptResult, error) {
+	cmd := request.Params.Arguments["cmd"]
+	if cmd == "" {
+		return nil, fmt.Errorf("cmd is required")
+	}
+
+	return mcp.NewGetPromptResult(
+		"Cmd Help Prompt",
+		[]mcp.PromptMessage{
+			mcp.NewPromptMessage(
+				mcp.RoleUser,
+				mcp.NewTextContent("What can I do with this func command? Please provide help for the command: "+cmd),
+			),
+			mcp.NewPromptMessage(
+				mcp.RoleAssistant,
+				mcp.NewEmbeddedResource(mcp.TextResourceContents{
+					URI:      fmt.Sprintf("func://%s/docs", cmd),
+					MIMEType: "text/plain",
+				}),
+			),
+		},
+	), nil
+}
+
+func handleRootHelpPrompt(ctx context.Context, request mcp.GetPromptRequest) (*mcp.GetPromptResult, error) {
+	return mcp.NewGetPromptResult(
+		"Help Prompt",
+		[]mcp.PromptMessage{
+			mcp.NewPromptMessage(
+				mcp.RoleUser,
+				mcp.NewTextContent("What can I do with the func command?"),
+			),
+			mcp.NewPromptMessage(
+				mcp.RoleAssistant,
+				mcp.NewEmbeddedResource(mcp.TextResourceContents{
+					URI:      "func://docs",
+					MIMEType: "text/plain",
+				}),
+			),
+		},
+	), nil
+}