feat(tools): pr_get

internal/tools/pr_get.go

@@ -0,0 +1,68 @@
+package tools
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/allowlist"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/gitea"
+	"gitea.d-ma.be/mathias/gitea-mcp/internal/registry"
+)
+
+type PRGet struct {
+	c *gitea.Client
+	a *allowlist.Allowlist
+}
+
+func NewPRGet(c *gitea.Client, a *allowlist.Allowlist) *PRGet { return &PRGet{c: c, a: a} }
+
+func (t *PRGet) Descriptor() registry.ToolDescriptor {
+	return registry.ToolDescriptor{
+		Name:        "pr_get",
+		Description: "Get a pull request by number.",
+		InputSchema: json.RawMessage(`{
+			"type":"object",
+			"properties":{
+				"owner":{"type":"string"},
+				"name":{"type":"string"},
+				"number":{"type":"integer","minimum":1}
+			},
+			"required":["owner","name","number"]
+		}`),
+	}
+}
+
+type prGetArgs struct {
+	Owner  string `json:"owner"`
+	Name   string `json:"name"`
+	Number int    `json:"number"`
+}
+
+func (t *PRGet) Call(ctx context.Context, raw json.RawMessage) (json.RawMessage, error) {
+	var args prGetArgs
+	if err := parseArgs(raw, &args); err != nil {
+		return nil, err
+	}
+	if err := t.a.Check(args.Owner); err != nil {
+		return nil, err
+	}
+	if args.Number < 1 {
+		return nil, fmt.Errorf("number must be >= 1: %w", gitea.ErrValidation)
+	}
+
+	pr, err := t.c.GetPullRequest(ctx, args.Owner, args.Name, args.Number)
+	if err != nil {
+		return nil, err
+	}
+
+	return textOK(map[string]any{
+		"number":   pr.Number,
+		"title":    pr.Title,
+		"html_url": pr.HTMLURL,
+		"head":     pr.Head.Ref,
+		"base":     pr.Base.Ref,
+		"state":    pr.State,
+		"draft":    pr.Draft,
+	})
+}