add Webhook #3148 (#3163)

* WIP add Webhook

* fix config html for webhook
add tooltips for webhook

* webhook: fix not enabling webhook

* send webhook as json

* Update ApiKey.md

* webhook: fix only sending last "Number"

* webhook JSON is now closer to the data log in CSV format

* webhook: drop timeStampTimeUTC and switch from timeStamp to lastvalue like lokal csv to fix no timestamp on error

---------

Co-authored-by: CaCO3 <caco3@ruinelli.ch>

code/components/jomjol_flowcontroll/ClassFlowWebhook.h

@@ -0,0 +1,39 @@
+#ifdef ENABLE_WEBHOOK
+
+#pragma once
+
+#ifndef CLASSFWEBHOOK_H
+#define CLASSFWEBHOOK_H
+
+#include "ClassFlow.h"
+
+#include "ClassFlowPostProcessing.h"
+
+#include <string>
+
+class ClassFlowWebhook :
+    public ClassFlow
+{
+protected:
+    std::string uri, apikey;
+	ClassFlowPostProcessing* flowpostprocessing;  
+    bool WebhookEnable;
+
+    void SetInitialParameter(void); 
+
+    void handleFieldname(string _decsep, string _value);   
+    void handleMeasurement(string _decsep, string _value);
+
+
+public:
+    ClassFlowWebhook();
+    ClassFlowWebhook(std::vector<ClassFlow*>* lfc);
+    ClassFlowWebhook(std::vector<ClassFlow*>* lfc, ClassFlow *_prev);
+
+    bool ReadParameter(FILE* pfile, string& aktparamgraph);
+    bool doFlow(string time);
+    string name(){return "ClassFlowWebhook";};
+};
+
+#endif //CLASSFWEBHOOK_H
+#endif //ENABLE_WEBHOOK