jail: sendMessage and showSuggestions handlers (#195)

Merging what's already implemented in bugs/whisper-on-geth.1.6.1

geth/jail/handlers.go

@@ -6,10 +6,9 @@ import (
 )
 
 const (
-	// EventLocalStorageSet is triggered when set request is sent to local storage
 	EventLocalStorageSet = "local_storage.set"
-
-	// LocalStorageMaxDataLen is maximum length of data that you can store in local storage
+	EventSendMessage = "jail.send_message"
+	EventShowSuggestions = "jail.show_suggestions"
 	LocalStorageMaxDataLen = 256
 )
 
@@ -107,3 +106,47 @@ func makeLocalStorageSetHandler(chatID string) func(call otto.FunctionCall) (res
 		return newResultResponse(call, true)
 	}
 }
+
+// SendMessageEvent wraps Jail send signals
+type SendMessageEvent struct {
+	ChatID  string `json:"chat_id"`
+	Message string `json:"message"`
+}
+
+func makeSendMessageHandler(chatID string) func(call otto.FunctionCall) (response otto.Value) {
+	return func(call otto.FunctionCall) otto.Value {
+		message := call.Argument(0).String()
+
+		node.SendSignal(node.SignalEnvelope{
+			Type: EventSendMessage,
+			Event: SendMessageEvent{
+				ChatID:  chatID,
+				Message: message,
+			},
+		})
+
+		return newResultResponse(call, true)
+	}
+}
+
+// ShowSuggestionsEvent wraps Jail show suggestion signals
+type ShowSuggestionsEvent struct {
+	ChatID string `json:"chat_id"`
+	Markup string `json:"markup"`
+}
+
+func makeShowSuggestionsHandler(chatID string) func(call otto.FunctionCall) (response otto.Value) {
+	return func(call otto.FunctionCall) otto.Value {
+		suggestionsMarkup := call.Argument(0).String()
+
+		node.SendSignal(node.SignalEnvelope{
+			Type: EventShowSuggestions,
+			Event: ShowSuggestionsEvent{
+				ChatID: chatID,
+				Markup: suggestionsMarkup,
+			},
+		})
+
+		return newResultResponse(call, true)
+	}
+}

geth/jail/jail.go

@@ -182,6 +182,12 @@ func (jail *Jail) Parse(chatID string, js string) string {
 		return makeError(err.Error())
 	}
 
+	// sendMessage/showSuggestions handlers
+	vm.Set("statusSignals", struct{}{})
+	statusSignals, _ := vm.Get("statusSignals")
+	statusSignals.Object().Set("sendMessage", makeSendMessageHandler(chatID))
+	statusSignals.Object().Set("showSuggestions", makeShowSuggestionsHandler(chatID))
+
 	jjs := string(web3JSCode) + `
 	var Web3 = require('web3');
 	var web3 = new Web3(jeth);