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200.58.107.103

File Name : access-portal.lua

MEDIA_ROLE_NONE = 0
MEDIA_ROLE_CAMERA = 1 << 0

function hasPermission (permissions, app_id, lookup)
  if permissions then
    for key, values in pairs(permissions) do
      if key == app_id then
        for _, v in pairs(values) do
          if v == lookup then
            return true
          end
        end
      end
    end
  end
  return false
end

function parseMediaRoles (media_roles_str)
  local media_roles = MEDIA_ROLE_NONE
  for role in media_roles_str:gmatch('[^,%s]+') do
    if role == "Camera" then
      media_roles = media_roles | MEDIA_ROLE_CAMERA
    end
  end
  return media_roles
end

function setPermissions (client, allow_client, allow_nodes)
  local client_id = client["bound-id"]
  Log.info(client, "Granting ALL access to client " .. client_id)

-- Update permissions on client
  client:update_permissions { [client_id] = allow_client and "all" or "-" }

-- Update permissions on camera source nodes
  for node in nodes_om:iterate() do
    local node_id = node["bound-id"]
    client:update_permissions { [node_id] = allow_nodes and "all" or "-" }
  end
end

function updateClientPermissions (client, permissions)
  local client_id = client["bound-id"]
  local str_prop = nil
  local app_id = nil
  local media_roles = nil
  local allowed = false

-- Make sure the client is not the portal itself
  str_prop = client.properties["pipewire.access.portal.is_portal"]
  if str_prop == "yes" then
    Log.info (client, "client is the portal itself")
    return
  end

-- Make sure the client has a portal app Id
  str_prop = client.properties["pipewire.access.portal.app_id"]
  if str_prop == nil then
    Log.info (client, "Portal managed client did not set app_id")
    return
  end
  if str_prop == "" then
    Log.info (client, "Ignoring portal check for non-sandboxed client")
    setPermissions (client, true, true)
    return
  end
  app_id = str_prop

-- Make sure the client has portal media roles
  str_prop = client.properties["pipewire.access.portal.media_roles"]
  if str_prop == nil then
  Log.info (client, "Portal managed client did not set media_roles")
    return
  end
  media_roles = parseMediaRoles (str_prop)
  if (media_roles & MEDIA_ROLE_CAMERA) == 0 then
    Log.info (client, "Ignoring portal check for clients without camera role")
    return
  end

-- Update permissions
  allowed = hasPermission (permissions, app_id, "yes")

Log.info (client, "setting permissions: " .. tostring(allowed))
  setPermissions (client, allowed, allowed)
end

-- Create portal clients object manager
clients_om = ObjectManager {
  Interest {
    type = "client",
    Constraint { "pipewire.access", "=", "portal" },
  }
}

-- Set permissions to portal clients from the permission store if loaded
pps_plugin = Plugin.find("portal-permissionstore")
if pps_plugin then
  nodes_om = ObjectManager {
    Interest {
      type = "node",
      Constraint { "media.role", "=", "Camera" },
      Constraint { "media.class", "=", "Video/Source" },
    }
  }
  nodes_om:activate()

clients_om:connect("object-added", function (om, client)
    local new_perms = pps_plugin:call("lookup", "devices", "camera");
    updateClientPermissions (client, new_perms)
  end)

nodes_om:connect("object-added", function (om, node)
    local new_perms = pps_plugin:call("lookup", "devices", "camera");
    for client in clients_om:iterate() do
      updateClientPermissions (client, new_perms)
    end
  end)

pps_plugin:connect("changed", function (p, table, id, deleted, permissions)
    if table == "devices" or id == "camera" then
      for app_id, _ in pairs(permissions) do
        for client in clients_om:iterate {
            Constraint { "pipewire.access.portal.app_id", "=", app_id }
        } do
          updateClientPermissions (client, permissions)
        end
      end
    end
  end)
else
  -- Otherwise, just set all permissions to all portal clients
  clients_om:connect("object-added", function (om, client)
    local id = client["bound-id"]
    Log.info(client, "Granting ALL access to client " .. id)
    client:update_permissions { ["any"] = "all" }
  end)
end

clients_om:activate()

System Information
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Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2024-11-11 09:34:29
..	dir	-	root/root	0755	2024-11-11 09:34:29
access-default.lua	file	1.3 KB	root/root	0644	2023-03-09 03:37:42
access-portal.lua	file	4.04 KB	root/root	0644	2023-03-09 03:37:42