Add new commands issue pin and issue unpin (#5597)

pkg/cmd/issue/unpin/unpin.go

@@ -0,0 +1,114 @@
+package unpin
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/MakeNowJust/heredoc"
+	"github.com/cli/cli/v2/api"
+	"github.com/cli/cli/v2/internal/config"
+	"github.com/cli/cli/v2/internal/ghrepo"
+	"github.com/cli/cli/v2/pkg/cmd/issue/shared"
+	"github.com/cli/cli/v2/pkg/cmdutil"
+	"github.com/cli/cli/v2/pkg/iostreams"
+	"github.com/shurcooL/githubv4"
+	"github.com/spf13/cobra"
+)
+
+type UnpinOptions struct {
+	HttpClient  func() (*http.Client, error)
+	Config      func() (config.Config, error)
+	IO          *iostreams.IOStreams
+	BaseRepo    func() (ghrepo.Interface, error)
+	SelectorArg string
+}
+
+func NewCmdUnpin(f *cmdutil.Factory, runF func(*UnpinOptions) error) *cobra.Command {
+	opts := &UnpinOptions{
+		IO:         f.IOStreams,
+		HttpClient: f.HttpClient,
+		Config:     f.Config,
+		BaseRepo:   f.BaseRepo,
+	}
+
+	cmd := &cobra.Command{
+		Use:   "unpin {<number> | <url>}",
+		Short: "Unpin a issue",
+		Long: heredoc.Doc(`
+			Unpin an issue from a repository.
+
+			The issue can be specified by issue number or URL.
+		`),
+		Example: heredoc.Doc(`
+			# Unpin issue from the current repository
+			$ gh issue unpin 23
+
+			# Unpin issue by URL
+			$ gh issue unpin https://github.com/owner/repo/issues/23
+
+			# Unpin an issue from specific repository
+			$ gh issue unpin 23 --repo owner/repo
+		`),
+		Args: cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			opts.BaseRepo = f.BaseRepo
+			opts.SelectorArg = args[0]
+
+			if runF != nil {
+				return runF(opts)
+			}
+
+			return unpinRun(opts)
+		},
+	}
+
+	return cmd
+}
+
+func unpinRun(opts *UnpinOptions) error {
+	cs := opts.IO.ColorScheme()
+
+	httpClient, err := opts.HttpClient()
+	if err != nil {
+		return err
+	}
+
+	issue, baseRepo, err := shared.IssueFromArgWithFields(httpClient, opts.BaseRepo, opts.SelectorArg, []string{"id", "number", "title", "isPinned"})
+	if err != nil {
+		return err
+	}
+
+	if !issue.IsPinned {
+		fmt.Fprintf(opts.IO.ErrOut, "%s Issue #%d (%s) is not pinned to %s\n", cs.Yellow("!"), issue.Number, issue.Title, ghrepo.FullName(baseRepo))
+		return nil
+	}
+
+	err = unpinIssue(httpClient, baseRepo, issue)
+	if err != nil {
+		return err
+	}
+
+	fmt.Fprintf(opts.IO.ErrOut, "%s Unpinned issue #%d (%s) from %s\n", cs.SuccessIconWithColor(cs.Red), issue.Number, issue.Title, ghrepo.FullName(baseRepo))
+
+	return nil
+}
+
+func unpinIssue(httpClient *http.Client, repo ghrepo.Interface, issue *api.Issue) error {
+	var mutation struct {
+		UnpinIssue struct {
+			Issue struct {
+				ID githubv4.ID
+			}
+		} `graphql:"unpinIssue(input: $input)"`
+	}
+
+	variables := map[string]interface{}{
+		"input": githubv4.UnpinIssueInput{
+			IssueID: issue.ID,
+		},
+	}
+
+	gql := api.NewClientFromHTTP(httpClient)
+
+	return gql.Mutate(repo.RepoHost(), "IssueUnpin", &mutation, variables)
+}