From a143fbf298368058847d3a98566d554a93ca37ef Mon Sep 17 00:00:00 2001
From: Benoit Blanchon <benoit.blanchon@gmail.com>
Date: Sat, 11 Jan 2014 10:45:14 +0100
Subject: [PATCH] Added class JsonHashTable

---
 ArduinoJsonParser.cpp | 35 ++++++++--------
 ArduinoJsonParser.h   | 93 +++++++++++++++++++++++++++++++------------
 2 files changed, 85 insertions(+), 43 deletions(-)

diff --git a/ArduinoJsonParser.cpp b/ArduinoJsonParser.cpp
index 6cdc58a5..8788573d 100644
--- a/ArduinoJsonParser.cpp
+++ b/ArduinoJsonParser.cpp
@@ -6,7 +6,7 @@
 
 #include "ArduinoJsonParser.h"
 
-int JsonParserBase::getNestedTokenCounts(int tokenIndex)
+int JsonObjectBase::getNestedTokenCounts(int tokenIndex)
 {
 	int count = 0;
 
@@ -18,48 +18,46 @@ int JsonParserBase::getNestedTokenCounts(int tokenIndex)
 	return count;
 }
 
-bool JsonParserBase::parseAndCheckType(char* jsonString, jsmntype_t type)
+bool JsonParserBase::parse(char* jsonString)
 {
 	buffer = jsonString;
 
 	if (JSMN_SUCCESS != jsmn_parse(&parser, jsonString, tokens, maxTokenCount))
 		return false;
 
-	if (tokens[0].type != type)
-		return false;
-
 	// Add null termination to each token
 	for (int i = 1; i < parser.toknext; i++)
 	{
 		buffer[tokens[i].end] = 0;
-
-		// skip nested objects
-		i += getNestedTokenCounts(i);
 	}
 
 	return true;
 }
 
-char* JsonParserBase::getValueByKey(char* name)
-{
-	// Scan each keys, every two other token
-	// (skip index 0, because it's the whole json object)
-	for (int i = 1; i < parser.toknext; i += 2)
+char* JsonHashTable::getString(char* name)
+{	
+	// skip first token, it's the whole object
+	int currentToken = 1;
+
+	// Scan each keys
+	for (int i = 0; i < tokens[0].size / 2 ; i++)
 	{
 		// Get key token string
-		char* key = buffer + tokens[i].start;
+		char* key = json + tokens[currentToken].start;
 
 		// Compare with desired name
 		if (strcmp(name, key) == 0)
 		{
-			return buffer + tokens[i + 1].start;
+			return json + tokens[currentToken + 1].start;
 		}
 
-		// skip nested objects
-		i += getNestedTokenCounts(i);
+		// move forward: key + value + nested tokens
+		currentToken += 2 + getNestedTokenCounts(currentToken + 1);
 	}
-}
 
+	return NULL;
+}
+/*
 char* JsonParserBase::getValueByIndex(int index)
 {
 	for (int i = 1; i < parser.toknext; i++)
@@ -92,3 +90,4 @@ int JsonParserBase::getArraySize()
 
 	return size;
 }
+*/
\ No newline at end of file
diff --git a/ArduinoJsonParser.h b/ArduinoJsonParser.h
index 6973ea8b..cb1f9de4 100644
--- a/ArduinoJsonParser.h
+++ b/ArduinoJsonParser.h
@@ -10,10 +10,69 @@
 #include <Arduino.h>
 #include "utility/jsmn.h"
 
+class JsonObjectBase
+{
+public:
+
+	JsonObjectBase()
+	{
+		json = NULL;
+		tokens = NULL;
+	}
+
+	bool success() 
+	{ 
+		return json != NULL && tokens != NULL;
+	}
+
+protected:
+	
+	JsonObjectBase(char* json, jsmntok_t* tokens)
+	{
+		this->json = json;
+		this->tokens = tokens;
+	}
+		
+	int getNestedTokenCounts(int tokenIndex);
+
+	char* json;
+	jsmntok_t* tokens;
+};
+
+class JsonHashTable : public JsonObjectBase
+{
+	friend class JsonParserBase;
+
+public:
+
+	JsonHashTable()
+	{
+
+	}
+
+	char* getString(char* key);
+
+private:
+
+	JsonHashTable(char* json, jsmntok_t* tokens)
+		: JsonObjectBase(json, tokens)
+	{
+
+	}
+};
+
 class JsonParserBase
 {
 public:
 
+	JsonHashTable parseHashTable(char* json)
+	{
+		if (!parse(json) || tokens[0].type != JSMN_OBJECT)
+			return JsonHashTable();
+
+		return JsonHashTable(json, tokens);
+	}
+
 protected:
 
 	JsonParserBase(jsmntok_t* tokens, int maxTokenCount)
@@ -24,20 +83,14 @@ protected:
 		jsmn_init(&parser);
 	}	
 	
-	int getTokenCount()
-	{
-		return parser.toknext - 1;
-	}
-
-	bool parseAndCheckType(char* json, jsmntype_t type);
+	bool parse(char* json);
+	/*
 	char* getValueByIndex(int index);
 	char* getValueByKey(char* name);
 	int getArraySize();
-
+	*/
 private:
 
-	int getNestedTokenCounts(int tokenIndex);
-
 	char* buffer;
 	jsmn_parser parser;
 	int maxTokenCount;
@@ -45,31 +98,21 @@ private:
 };
 
 template <int N>
-class JsonObjectParser : public JsonParserBase
+class JsonParser : public JsonParserBase
 {
 public:
 
-	JsonObjectParser()
-		: JsonParserBase(tokens, N + 1)
+	JsonParser()
+		: JsonParserBase(tokens, N)
 	{
 
 	}
 
-	bool parse(char* json)
-	{
-		return parseAndCheckType(json, JSMN_OBJECT);
-	}
-
-	char* getValue(char* name)
-	{
-		return getValueByKey(name);
-	}
-
 private:
 	
-	jsmntok_t tokens[N + 1];
+	jsmntok_t tokens[N];
 };
-
+/*
 template <int N>
 class JsonArrayParser : public JsonParserBase
 {
@@ -100,6 +143,6 @@ private:
 
 	jsmntok_t tokens[N + 1];
 };
-
+*/
 #endif