Allow batch operations on multiple entities (#512)

commands now accept multiple arguments where it makes sense.

#### before
```
NAME:
   tea issues close - Change state of an issue to 'closed'

USAGE:
   tea issues close [command options] <issue index>
```

#### after
```
NAME:
   tea issues close - Change state of one ore more issues to 'closed'

USAGE:
   tea issues close [command options] <issue index> [<issue index>...]
```

Co-authored-by: Norwin <git@nroo.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/512
Reviewed-by: 6543 <6543@obermui.de>
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: Norwin <noerw@noreply.gitea.io>
Co-committed-by: Norwin <noerw@noreply.gitea.io>

modules/context/context.go

@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"log"
 	"os"
+	"path"
 	"strings"
 
 	"code.gitea.io/sdk/gitea"
@@ -51,6 +52,13 @@ func (ctx *TeaContext) GetListOptions() gitea.ListOptions {
 	}
 }
 
+// GetRemoteRepoHTMLURL returns the web-ui url of the remote repo,
+// after ensuring a remote repo is present in the context.
+func (ctx *TeaContext) GetRemoteRepoHTMLURL() string {
+	ctx.Ensure(CtxRequirement{RemoteRepo: true})
+	return path.Join(ctx.Login.URL, ctx.Owner, ctx.Repo)
+}
+
 // Ensure checks if requirements on the context are set, and terminates otherwise.
 func (ctx *TeaContext) Ensure(req CtxRequirement) {
 	if req.LocalRepo && ctx.LocalRepo == nil {

modules/utils/parse.go

@@ -10,6 +10,18 @@ import (
 	"strings"
 )
 
+// ArgsToIndices take issue/pull index as string and returns int64s
+func ArgsToIndices(args []string) ([]int64, error) {
+	indices := make([]int64, len(args))
+	for i, arg := range args {
+		var err error
+		if indices[i], err = ArgToIndex(arg); err != nil {
+			return nil, err
+		}
+	}
+	return indices, nil
+}
+
 // ArgToIndex take issue/pull index as string and return int64
 func ArgToIndex(arg string) (int64, error) {
 	if strings.HasPrefix(arg, "#") {