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lib/PsychicHttp/src/TemplatePrinter.h

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+#ifndef TemplatePrinter_h
+  #define TemplatePrinter_h
+
+  #include "PsychicCore.h"
+  #include <Print.h>
+  
+  /************************************************************
+  
+	TemplatePrinter Class
+	
+	A basic templating engine for a stream of text.
+	This wraps the Arduino Print interface and writes to any
+	Print interface.
+	
+	Written by Christopher Andrews (https://github.com/Chris--A) 
+  
+  ************************************************************/
+  
+  class TemplatePrinter;
+
+  typedef std::function<bool(Print &output, const char *parameter)> TemplateCallback;
+  typedef std::function<void(TemplatePrinter &printer)> TemplateSourceCallback;
+
+  class TemplatePrinter : public Print{
+    private:
+      bool _inParam;
+      char _paramBuffer[64];
+      uint8_t _paramPos;
+      Print &_stream;
+      TemplateCallback _cb;
+      char _delimiter;
+    
+      void resetParam(bool flush);
+      
+    public:
+      using Print::write;
+
+      static void start(Print &stream, TemplateCallback cb, TemplateSourceCallback entry){
+        TemplatePrinter printer(stream, cb);
+        entry(printer);
+      }
+
+      TemplatePrinter(Print &stream, TemplateCallback cb, const char delimeter = '%') : _stream(stream), _cb(cb), _delimiter(delimeter) { resetParam(false); }
+      ~TemplatePrinter(){ flush(); }
+
+      void flush() override;
+      size_t write(uint8_t data) override;
+      size_t copyFrom(Stream &stream);
+  };
+
+#endif