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lib/PsychicHttp/src/TemplatePrinter.cpp

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+  /************************************************************
+  
+	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) 
+  
+  ************************************************************/
+  
+#include "TemplatePrinter.h"
+
+void TemplatePrinter::resetParam(bool flush){
+  if(flush && _inParam){
+    _stream.write(_delimiter);
+    
+    if(_paramPos)
+      _stream.print(_paramBuffer);
+  }
+  
+  memset(_paramBuffer, 0, sizeof(_paramBuffer));
+  _paramPos = 0;
+  _inParam = false;
+}
+
+
+void TemplatePrinter::flush(){ 
+  resetParam(true);
+  _stream.flush();
+}
+
+size_t TemplatePrinter::write(uint8_t data){
+  
+  if(data == _delimiter){
+    
+    // End of parameter, send to callback
+    if(_inParam){
+      
+      // On false, return the parameter place holder as is: not a parameter
+	  // Bug fix: ignore parameters that are zero length.
+      if(!_paramPos || !_cb(_stream, _paramBuffer)){
+        resetParam(true);
+        _stream.write(data);
+      }else{
+        resetParam(false);
+      }
+      
+    // Start collecting parameter
+    }else{
+      _inParam = true;
+    }
+  }else{
+    
+    // Are we collecting
+    if(_inParam){
+      
+      // Is param still valid
+      if(isalnum(data) || data == '_'){
+        
+        // Total param len must be 63, 1 for null.
+        if(_paramPos < sizeof(_paramBuffer) - 1){
+          _paramBuffer[_paramPos++] = data;
+          
+        // Not a valid param
+        }else{
+          resetParam(true);
+        }
+      }else{
+        resetParam(true);
+        _stream.write(data);
+      }
+
+    // Just output
+    }else{
+      _stream.write(data);
+    }
+  }
+  return 1;
+}
+    
+size_t TemplatePrinter::copyFrom(Stream &stream){
+  size_t count = 0;
+  
+  while(stream.available())
+    count += this->write(stream.read());
+  
+  return count;
+}