feat: add endpoint to retrieve root-level groups in org

routers/api/v1/api.go

@@ -1734,6 +1734,7 @@ func Routes() *web.Router {
 				})
 			}, reqToken(), reqOrgOwnership())
 			m.Group("/groups", func() {
+				m.Get("", org.GetOrgGroups)
 				m.Post("/new", reqToken(), reqGroupMembership(perm.AccessModeWrite, true), group.NewGroup)
 			})
 		}, tokenRequiresScopes(auth_model.AccessTokenScopeCategoryOrganization), orgAssignment(true), checkTokenPublicOnly())

routers/api/v1/org/group.go

@@ -0,0 +1,78 @@
+package org
+
+import (
+	"net/http"
+
+	group_model "code.gitea.io/gitea/models/group"
+	"code.gitea.io/gitea/models/organization"
+	"code.gitea.io/gitea/models/perm"
+	"code.gitea.io/gitea/models/unit"
+	api "code.gitea.io/gitea/modules/structs"
+	"code.gitea.io/gitea/services/context"
+	"code.gitea.io/gitea/services/convert"
+)
+
+func GetOrgGroups(ctx *context.APIContext) {
+	// swagger:operation GET /orgs/{org}/groups organization orgListGroups
+	// ---
+	// summary: List an organization's root-level groups
+	// produces:
+	// - application/json
+	// parameters:
+	// - name: org
+	//   in: path
+	//   description: name of the organization
+	//   type: string
+	//   required: true
+	// - name: page
+	//   in: query
+	//   description: page number of results to return (1-based)
+	//   type: integer
+	// - name: limit
+	//   in: query
+	//   description: page size of results
+	//   type: integer
+	// responses:
+	//   "200":
+	//     "$ref": "#/responses/GroupList"
+	//   "404":
+	//     "$ref": "#/responses/notFound"
+	var doerID int64
+	if ctx.Doer != nil {
+		doerID = ctx.Doer.ID
+	}
+	org, err := organization.GetOrgByName(ctx, ctx.PathParam("org"))
+	if err != nil {
+		if organization.IsErrOrgNotExist(err) {
+			ctx.APIError(http.StatusUnprocessableEntity, err)
+		} else {
+			ctx.APIErrorInternal(err)
+		}
+		return
+	}
+
+	if !organization.HasOrgOrUserVisible(ctx, org.AsUser(), ctx.Doer) {
+		ctx.APIErrorNotFound("HasOrgOrUserVisible", nil)
+		return
+	}
+	groups, err := group_model.FindGroupsByCond(ctx, &group_model.FindGroupsOptions{
+		ParentGroupID: 0,
+		ActorID:       doerID,
+		OwnerID:       org.ID,
+	}, group_model.
+		AccessibleGroupCondition(ctx.Doer, unit.TypeInvalid, perm.AccessModeRead))
+	if err != nil {
+		ctx.APIErrorInternal(err)
+		return
+	}
+	apiGroups := make([]*api.Group, len(groups))
+	for i, group := range groups {
+		apiGroups[i], err = convert.ToAPIGroup(ctx, group, ctx.Doer)
+		if err != nil {
+			ctx.APIErrorInternal(err)
+			return
+		}
+	}
+	ctx.SetTotalCountHeader(int64(len(groups)))
+	ctx.JSON(http.StatusOK, apiGroups)
+}