Implement "conversation lock" for issue comments (#5073)

modules/auth/repo_form.go

@@ -10,6 +10,7 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/routers/utils"
 
 	"github.com/Unknwon/com"
@@ -308,6 +309,32 @@ func (f *ReactionForm) Validate(ctx *macaron.Context, errs binding.Errors) bindi
 	return validate(errs, ctx.Data, f, ctx.Locale)
 }
 
+// IssueLockForm form for locking an issue
+type IssueLockForm struct {
+	Reason string `binding:"Required"`
+}
+
+// Validate validates the fields
+func (i *IssueLockForm) Validate(ctx *macaron.Context, errs binding.Errors) binding.Errors {
+	return validate(errs, ctx.Data, i, ctx.Locale)
+}
+
+// HasValidReason checks to make sure that the reason submitted in
+// the form matches any of the values in the config
+func (i IssueLockForm) HasValidReason() bool {
+	if strings.TrimSpace(i.Reason) == "" {
+		return true
+	}
+
+	for _, v := range setting.Repository.Issue.LockReasons {
+		if v == i.Reason {
+			return true
+		}
+	}
+
+	return false
+}
+
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