Implement PR closing and reopening (#304)

Implement pull request closing/reopening

Signed-off-by: Martin Reboredo <yakoyoku@gmail.com>

Correct year and `pull` description

Apply changes from #291

Return fmt.Errorf instead of log.Fatal if no pull index was supplied

Co-authored-by: Martin Reboredo <yakoyoku@gmail.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/304
Reviewed-by: Norwin <noerw@noreply.gitea.io>
Reviewed-by: appleboy <appleboy.tw@gmail.com>
Co-Authored-By: Martin Reboredo <yakoyakoyokuyoku@noreply.gitea.io>
Co-Committed-By: Martin Reboredo <yakoyakoyokuyoku@noreply.gitea.io>

cmd/pulls/edit.go

@@ -0,0 +1,38 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package pulls
+
+import (
+	"fmt"
+
+	"code.gitea.io/tea/modules/context"
+	"code.gitea.io/tea/modules/print"
+	"code.gitea.io/tea/modules/utils"
+
+	"code.gitea.io/sdk/gitea"
+	"github.com/urfave/cli/v2"
+)
+
+// editPullState abstracts the arg parsing to edit the given pull request
+func editPullState(cmd *cli.Context, opts gitea.EditPullRequestOption) error {
+	ctx := context.InitCommand(cmd)
+	ctx.Ensure(context.CtxRequirement{RemoteRepo: true})
+	if ctx.Args().Len() == 0 {
+		return fmt.Errorf("Please provide a Pull Request index")
+	}
+
+	index, err := utils.ArgToIndex(ctx.Args().First())
+	if err != nil {
+		return err
+	}
+
+	pr, _, err := ctx.Login.Client().EditPullRequest(ctx.Owner, ctx.Repo, index, opts)
+	if err != nil {
+		return err
+	}
+
+	print.PullDetails(pr, nil, nil)
+	return nil
+}