ffi: expose init_config function

Signed-off-by: Sumner Evans <sumner@beeper.com>

imessage/ffi/events.go

@@ -824,10 +824,6 @@ func handleDelivered(status *direct.MessageDelivered) {
 	}
 }
 
-type ReqStarted struct {
-	LoggedIn bool `json:"logged_in"`
-}
-
 func handleEvent(evt any) {
 	switch typedEvt := evt.(type) {
 	case *imessage.Message:

imessage/ffi/global.go

@@ -20,11 +20,7 @@ import (
 	"context"
 	_ "embed"
 	"encoding/gob"
-	"encoding/json"
 	"errors"
-	"fmt"
-	"os"
-	"path/filepath"
 	"reflect"
 	"strings"
 	"sync/atomic"
@@ -139,36 +135,6 @@ func init() {
 
 	// Beeper Mini is back to using Mac identifiers
 	ids.PreferiPhoneVersions = false
-
-	must(0, json.Unmarshal(must(os.ReadFile("config.json")), &global.Cfg))
-
-	global.NAC = &nacserv.Client{
-		URL:     global.Cfg.NACServURL,
-		Token:   global.Cfg.NACServToken,
-		IsRelay: global.Cfg.NACServIsRelay,
-
-		BeeperToken: global.Cfg.IMAToken,
-	}
-
-	global.IM = direct.NewConnector(global.NAC, handleEvent, nil, nil, global.Cfg.EnablePairECSending, nil, manualLookupRatelimiter)
-	global.IM.LoginTestConfig = global.Cfg.LoginTest
-
-	global.SecondaryIM = direct.NewConnector(global.NAC, handleSecondaryEvent, nil, nil, false, nil, manualLookupRatelimiter)
-	if global.Cfg.AttachmentDir == "" {
-		global.Cfg.AttachmentDir = "attachments"
-	}
-	if global.Cfg.DeviceName != "" {
-		ids.DeviceName = global.Cfg.DeviceName
-	}
-	var err error
-	global.Cfg.AttachmentDir, err = filepath.Abs(global.Cfg.AttachmentDir)
-	if err != nil {
-		panic(fmt.Errorf("failed to get absolute path of attachment directory: %w", err))
-	}
-	err = os.MkdirAll(global.Cfg.AttachmentDir, 0700)
-	if err != nil {
-		panic(fmt.Errorf("failed to create attachment directory: %w", err))
-	}
 }
 
 func (imc *IMContext) GetMatrixReply(ctx context.Context, msg *imessage.Message) (threadRoot, replyFallback id.EventID) {

imessage/ffi/main.go

@@ -20,16 +20,20 @@ import "C"
 import (
 	"context"
 	_ "embed"
+	"encoding/json"
+	"fmt"
 	"io"
 	"os"
 	"os/signal"
+	"path/filepath"
 	"runtime"
 	"slices"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"syscall"
 	"time"
+	"unsafe"
 
 	"github.com/rs/zerolog"
 	deflog "github.com/rs/zerolog/log"
@@ -40,7 +44,9 @@ import (
 
 	"github.com/beeper/imessage/analytics"
 	"github.com/beeper/imessage/database"
+	"github.com/beeper/imessage/imessage/direct"
 	"github.com/beeper/imessage/imessage/direct/ids"
+	"github.com/beeper/imessage/imessage/direct/nacserv"
 	"github.com/beeper/imessage/imessage/direct/util/uri"
 	"github.com/beeper/imessage/ipc"
 	"github.com/beeper/imessage/msgconv"
@@ -356,3 +362,38 @@ type ReqStarted struct {
 
 	PendingNACURL bool `json:"pending_nac_url"`
 }
+
+// init_config is called over FFI to initialize the bridge configuration.
+//
+//export init_config
+func init_config(data *C.char, n C.int) {
+	must(0, json.Unmarshal(C.GoBytes(unsafe.Pointer(data), n), &global.Cfg))
+
+	global.NAC = &nacserv.Client{
+		URL:     global.Cfg.NACServURL,
+		Token:   global.Cfg.NACServToken,
+		IsRelay: global.Cfg.NACServIsRelay,
+
+		BeeperToken: global.Cfg.IMAToken,
+	}
+
+	global.IM = direct.NewConnector(global.NAC, handleEvent, nil, nil, global.Cfg.EnablePairECSending, nil, manualLookupRatelimiter)
+	global.IM.LoginTestConfig = global.Cfg.LoginTest
+
+	global.SecondaryIM = direct.NewConnector(global.NAC, handleSecondaryEvent, nil, nil, false, nil, manualLookupRatelimiter)
+	if global.Cfg.AttachmentDir == "" {
+		global.Cfg.AttachmentDir = "attachments"
+	}
+	if global.Cfg.DeviceName != "" {
+		ids.DeviceName = global.Cfg.DeviceName
+	}
+	var err error
+	global.Cfg.AttachmentDir, err = filepath.Abs(global.Cfg.AttachmentDir)
+	if err != nil {
+		panic(fmt.Errorf("failed to get absolute path of attachment directory: %w", err))
+	}
+	err = os.MkdirAll(global.Cfg.AttachmentDir, 0700)
+	if err != nil {
+		panic(fmt.Errorf("failed to create attachment directory: %w", err))
+	}
+}