1 files changed, 63 insertions, 0 deletions
diff --git a/plugin/client.go b/plugin/client.go
new file mode 100644
index 000000000..457a16cf4
--- /dev/null
+++ b/plugin/client.go
@@ -0,0 +1,63 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package plugin
+
+import (
+	"github.com/hashicorp/go-plugin"
+)
+
+// Starts the serving of a Mattermost plugin over net/rpc. gRPC is not yet supported.
+//
+// Call this when your plugin is ready to start.
+func ClientMain(pluginImplementation interface{}) {
+	if impl, ok := pluginImplementation.(interface {
+		SetAPI(api API)
+		SetSelfRef(ref interface{})
+	}); !ok {
+		panic("Plugin implementation given must embed plugin.MattermostPlugin")
+	} else {
+		impl.SetAPI(nil)
+		impl.SetSelfRef(pluginImplementation)
+	}
+
+	pluginMap := map[string]plugin.Plugin{
+		"hooks": &hooksPlugin{hooks: pluginImplementation},
+	}
+
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: handshake,
+		Plugins:         pluginMap,
+	})
+}
+
+type MattermostPlugin struct {
+	// API exposes the plugin api, and becomes available just prior to the OnActive hook.
+	API API
+
+	selfRef interface{} // This is so we can unmarshal into our parent
+}
+
+// SetAPI persists the given API interface to the plugin. It is invoked just prior to the
+// OnActivate hook, exposing the API for use by the plugin.
+func (p *MattermostPlugin) SetAPI(api API) {
+	p.API = api
+}
+
+// SetSelfRef is called by ClientMain to maintain a pointer to the plugin interface originally
+// registered. This allows for the default implementation of OnConfigurationChange.
+func (p *MattermostPlugin) SetSelfRef(ref interface{}) {
+	p.selfRef = ref
+}
+
+// OnConfigurationChange provides a default implementation of this hook event that unmarshals the
+// plugin configuration directly onto the plugin struct.
+//
+// Feel free to implement your own version of OnConfigurationChange if you need more advanced
+// configuration handling.
+func (p *MattermostPlugin) OnConfigurationChange() error {
+	if p.selfRef != nil {
+		return p.API.LoadPluginConfiguration(p.selfRef)
+	}
+	return nil
+}