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|
package dbus
import (
"strings"
"hakurei.app/hst"
)
// ProxyPair is an upstream dbus address and a downstream socket path.
type ProxyPair [2]string
// interfacesAll returns an iterator over all interfaces specified in c.
func interfacesAll(c *hst.BusConfig) func(yield func(string) bool) {
return func(yield func(string) bool) {
for _, iface := range c.See {
if !yield(iface) {
return
}
}
for _, iface := range c.Talk {
if !yield(iface) {
return
}
}
for _, iface := range c.Own {
if !yield(iface) {
return
}
}
for iface := range c.Call {
if !yield(iface) {
return
}
}
for iface := range c.Broadcast {
if !yield(iface) {
return
}
}
}
}
// checkInterfaces checks [hst.BusConfig] for invalid interfaces based on an undocumented check in xdg-dbus-error,
// returning [BadInterfaceError] if one is encountered.
func checkInterfaces(c *hst.BusConfig, segment string) error {
for iface := range interfacesAll(c) {
/*
xdg-dbus-proxy fails without output when this condition is not met:
char *dot = strrchr (filter->interface, '.');
if (dot != NULL)
{
*dot = 0;
if (strcmp (dot + 1, "*") != 0)
filter->member = g_strdup (dot + 1);
}
trim ".*" since they are removed before searching for '.':
if (g_str_has_suffix (name, ".*"))
{
name[strlen (name) - 2] = 0;
wildcard = TRUE;
}
*/
if strings.IndexByte(strings.TrimSuffix(iface, ".*"), '.') == -1 {
return &BadInterfaceError{iface, segment}
}
}
return nil
}
// Args returns the xdg-dbus-proxy arguments equivalent of [hst.BusConfig].
func Args(c *hst.BusConfig, bus ProxyPair) (args []string) {
argc := 2 + len(c.See) + len(c.Talk) + len(c.Own) + len(c.Call) + len(c.Broadcast)
if c.Log {
argc++
}
if c.Filter {
argc++
}
args = make([]string, 0, argc)
args = append(args, bus[0], bus[1])
if c.Filter {
args = append(args, "--filter")
}
for _, name := range c.See {
args = append(args, "--see="+name)
}
for _, name := range c.Talk {
args = append(args, "--talk="+name)
}
for _, name := range c.Own {
args = append(args, "--own="+name)
}
for name, rule := range c.Call {
args = append(args, "--call="+name+"="+rule)
}
for name, rule := range c.Broadcast {
args = append(args, "--broadcast="+name+"="+rule)
}
if c.Log {
args = append(args, "--log")
}
return
}
// NewConfig returns the address of a new [hst.BusConfig] with optional defaults.
func NewConfig(id string, defaults, mpris bool) *hst.BusConfig {
c := hst.BusConfig{
Call: make(map[string]string),
Broadcast: make(map[string]string),
Filter: true,
}
if defaults {
c.Talk = []string{"org.freedesktop.DBus", "org.freedesktop.Notifications"}
c.Call["org.freedesktop.portal.*"] = "*"
c.Broadcast["org.freedesktop.portal.*"] = "@/org/freedesktop/portal/*"
if id != "" {
c.Own = []string{id + ".*"}
if mpris {
c.Own = append(c.Own, "org.mpris.MediaPlayer2."+id+".*")
}
}
}
return &c
}
|
