Capabilities

A group member’s capabilities are a single UInt32 bitmask. Capabilities exposes the bit constants core assigns, plus helpers for reading and editing a mask. Use them with the group capability methods on mero.admin (getMemberCapabilities, setMemberCapabilities, getDefaultCapabilities, setDefaultCapabilities). The groups & governance guide shows a full flow.

Constants

Core MemberCapabilities, bits 0–8:

public enum Capabilities {
    public static let canCreateContext:     UInt32 = 1 << 0
    public static let canInviteMembers:      UInt32 = 1 << 1
    public static let canJoinOpenSubgroups:  UInt32 = 1 << 2
    public static let manageMembers:         UInt32 = 1 << 3
    public static let manageApplication:     UInt32 = 1 << 4
    public static let canCreateSubgroup:     UInt32 = 1 << 5
    public static let canDeleteSubgroup:     UInt32 = 1 << 6
    public static let canManageVisibility:   UInt32 = 1 << 7
    public static let canManageMetadata:     UInt32 = 1 << 8
}

Caution

Bits 9 and above are unassigned and reserved for future core releases — do not repurpose them for application data.

Helpers

static func hasCap(_ mask: UInt32, _ cap: UInt32) -> Bool     // every bit of cap set?
static func withCap(_ mask: UInt32, _ cap: UInt32) -> UInt32  // mask with cap set
static func withoutCap(_ mask: UInt32, _ cap: UInt32) -> UInt32 // mask with cap cleared

Example

let current = try await mero.admin.getMemberCapabilities(groupId, identity: identity)
// MemberCapabilities.capabilities is Int; the bit helpers work on UInt32.
var mask = UInt32(current.capabilities)

if !Capabilities.hasCap(mask, Capabilities.canInviteMembers) {
    mask = Capabilities.withCap(mask, Capabilities.canInviteMembers)
    mask = Capabilities.withCap(mask, Capabilities.canCreateSubgroup)
    mask = Capabilities.withoutCap(mask, Capabilities.canManageMetadata)
    try await mero.admin.setMemberCapabilities(
        groupId,
        identity: identity,
        request: SetMemberCapabilitiesRequest(capabilities: Int(mask))
    )
}