Register worker in init.

This allows backends which can't always be compiled due to missing
dependencies (say libnotmuch) to be compiled conditionally with buildflags.

1 files changed, 27 insertions, 0 deletions

diff --git a/worker/handlers/register.go b/worker/handlers/register.go
new file mode 100644
index 00000000..5e8463e8
--- /dev/null
+++ b/worker/handlers/register.go
@@ -0,0 +1,27 @@
+package handlers
+
+import (
+	"fmt"
+
+	"git.sr.ht/~sircmpwn/aerc/worker/types"
+)
+
+type FactoryFunc func(*types.Worker) (types.Backend, error)
+
+var workerFactories map[string]FactoryFunc = make(map[string]FactoryFunc)
+
+func RegisterWorkerFactory(scheme string, factory FactoryFunc) {
+	workerFactories[scheme] = factory
+}
+
+func GetHandlerForScheme(scheme string, worker *types.Worker) (types.Backend, error) {
+	factory, ok := workerFactories[scheme]
+	if !ok {
+		return nil, fmt.Errorf("Unknown backend %s", scheme)
+	}
+	backend, err := factory(worker)
+	if err != nil {
+		return nil, err
+	}
+	return backend, nil
+}