configreader/configfile.c

#include "types.h"
#include "configfile.h"
#include "configmodel.h"
#include "sectionstore.h"

#include "containers/stringarray.h"
#include "containers/sectionarray.h"
#include <proto/exec.h>
#include <proto/dos.h>
#include <string.h>
// #include <stdio.h>
// #include <stdlib.h>
// #include <ctype.h>

#define ZERO ((BPTR)0)

STATIC SECTIONPTR findOrCreateSection(SECTIONSTOREPTR sectionStore, CONST_STRPTR compoundKey);
STATIC LINEPTR configFileReadLine(BPTR file);


// - STRUCTS -----------------------------------------------------------------------------
struct ConfigFile
{
	CONST_STRPTR filename;
	SECTIONSTOREPTR sectionStore;
};

// ---------------------------------------------------------------------------------------
// - CONFIG FILE -------------------------------------------------------------------------
// ---------------------------------------------------------------------------------------

VOID ConfigFileFree(CONFIGFILEPTR abstractConfigFile)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		if( configFile->sectionStore != NULL )
		{
			SectionStoreFree(configFile->sectionStore);
		}
		FreeVec(configFile);
	}
}

CONFIGFILEPTR ConfigFileRead(CONST_STRPTR filename)
{
	struct ConfigFile* result = NULL;
	BPTR configFile = Open(filename, MODE_OLDFILE);
	if( configFile != ZERO )
	{
	
		LINEPTR line = NULL;
		result = AllocVec(sizeof(struct ConfigFile), MEMF_CLEAR);
		result->sectionStore = SectionStoreNew();
		while( (line = configFileReadLine(configFile)) != NULL )
		{
			SectionStoreAddLineToCurrentSection(result->sectionStore, line);
			//LineDump(line);
		}
		Close(configFile);
	}
	
	return result;
}


// a key is "foo.bar.baz.blah" where "foo" is the primary section name
// "bar.baz" is the secondary section name and "blah" is the variable name.
// this splits foo.bar.baz.blah into foo, bar.baz amd blah.  
// section, subsection and variable.	
// we'll get empty strings for the parts that arent present
StringArray ConfigFileSplitKeyCompletely(CONST_STRPTR key)
{
	StringArray result = StringArrayNew();
	StringArray parts = StringArrayNew();
	ULONG numberOfParts = 0;
	
	STRPTR token = NULL;
	// we need to make a copy of the key because strtok modifies it.
 	STRPTR keyCopy = AllocVec(strlen(key)+1, MEMF_CLEAR);
 	CopyMem(key, keyCopy, strlen(key));
	
	token = strtok(keyCopy, ".");
  	while (token != NULL)
 	{
 		StringArrayAppendAndRetain(parts, token);
  		token = strtok(NULL, ".");
	}
	FreeVec(keyCopy);
	
	// now we join all but the first and last part
	numberOfParts = SizeOfArray(parts);
	if( numberOfParts == 1 ) //just a variable ["","","var"]
	{
		StringArrayAppendAndRetain(result, "");
		StringArrayAppendAndRetain(result, "");
		StringArrayAppendAndRetain(result, (STRPTR)ArrayBackValue(STRPTR, parts));
	}
	else if( numberOfParts == 2 ) // section and variable ["section","","var"]
	{
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[0]);
		StringArrayAppendAndRetain(result, "");
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[1]);
	}
	else if( numberOfParts == 3 ) // section and subsection and variable ["section","subsec","var"]
	{
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[0]);
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[1]);
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[2]);
	}
	else if( numberOfParts > 3 ) // subsections needs dotted ["section", "subsec1.subsec2", "var""]
	{
		StringArrayAppendAndRetain(result, StringArrayValues(parts)[0]); //section

		// start at index 1, and add (size -2 (start+end)) parts
		StringArrayAppend(result, StringArrayJoinedParts(parts, '.', 1, SizeOfArray(parts)-2));

		StringArrayAppendAndRetain(result, (STRPTR)ArrayBackValue(STRPTR, parts)); // variable
	}
 	StringArrayFree(parts, TRUE);
	return result;
}

StringArray ConfigFileSplitKeyForVar(CONST_STRPTR key)
{
	// a key is "foo.bar.baz.blah" where "foo" is the primary section name
	// "bar.baz" is the secondary section name and "blah" is the variable name.
	// In this case we'll just break it down into the canonical section name, 
	// foo.bar.baz and the variable name blah.
	
	StringArray result = StringArrayNew();
	StringArray parts = StringArrayNew();
	STRPTR sectionPart = NULL;
	STRPTR varPart = NULL;
	
	STRPTR token = NULL;
	// we need to make a copy of the key because strtok modifies it.
 	STRPTR keyCopy = AllocVec(strlen(key)+1, MEMF_CLEAR);
 	CopyMem(key, keyCopy, strlen(key));
	
	token = strtok(keyCopy, ".");
  	while (token != NULL)
 	{
 		StringArrayAppendAndRetain(parts, token);
  		token = strtok(NULL, ".");
	}
	FreeVec(keyCopy);
	
	// now we join all but the last part
 	sectionPart = StringArrayJoinedParts(parts, '.', 0, SizeOfArray(parts)-1);
 	StringArrayAppend(result, sectionPart); // its been alloced so dont copy
 	varPart = (STRPTR)ArrayBackValue(STRPTR, parts);
 	StringArrayAppendAndRetain(result, varPart); // its a reference so copy
 	StringArrayFree(parts, TRUE);
	return result;
}

STRPTR ConfigFileGet(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey)
{
	STRPTR result = NULL;
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray split = ConfigFileSplitKeyForVar(compoundKey);
 		VARIABLEPTR var = SectionStoreGet(configFile->sectionStore, StringArrayValues(split)[0], StringArrayValues(split)[1]);
		if( var != NULL )
		{
			CONST_STRPTR value = VariableGetRawValue(var);
			result = AllocVec(strlen(value)+1, MEMF_CLEAR);
			CopyMem(value, result, strlen(value));
		}
		StringArrayFree(split, TRUE);
	}
	return result;
}

StringArray ConfigFileGetAll(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey)
{
	StringArray result = StringArrayNew();
	ULONG index = 0;
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray split = ConfigFileSplitKeyForVar(compoundKey);
 		VariableArray vars = SectionStoreGetAll(configFile->sectionStore, StringArrayValues(split)[0], StringArrayValues(split)[1]);
		for( index = 0; index < SizeOfArray(vars); index++ )
		{
			StringArrayAppendAndRetain(result, VariableGetRawValue(VariableArrayValues(vars)[index]));
		}
 		VariableArrayFree(vars, FALSE);
		StringArrayFree(split, TRUE);
	}
	return result;
}

VOID ConfigFileAdd(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey, CONST_STRPTR stringValue)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		SECTIONPTR section = NULL;
		VARIABLEPTR var = NULL;
		CONST_STRPTR varLine = NULL;
		LINEPTR line = NULL;
		
		StringArray canonicalParts = ConfigFileSplitKeyForVar(compoundKey);
		var = VariableCreate(StringArrayValues(canonicalParts)[1], stringValue);
		varLine = VariableSerialize(var);
		line = LineNew(varLine);
		LineSetInitialVariable(line, var);
		FreeVec((STRPTR)varLine);
		StringArrayFree(canonicalParts, TRUE);

		// now get the section
		section = findOrCreateSection(configFile->sectionStore, compoundKey);
		// add the line to the section
		SectionAddLine(section, line);		
	}
}

VOID ConfigFileSet(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey, CONST_STRPTR stringValue)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray parts = ConfigFileSplitKeyCompletely(compoundKey);
		
		StringArrayFree(parts, TRUE);
	}
}

VOID ConfigFileReplaceAll(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey, CONST_STRPTR stringValue)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray parts = ConfigFileSplitKeyCompletely(compoundKey);
		
		StringArrayFree(parts, TRUE);
	}
}

VOID ConfigFileUnset(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey, CONST_STRPTR stringValue)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray parts = ConfigFileSplitKeyCompletely(compoundKey);
		
		StringArrayFree(parts, TRUE);
	}
}

VOID ConfigFileUnsetAll(CONFIGFILEPTR abstractConfigFile, CONST_STRPTR compoundKey, CONST_STRPTR stringValue)
{
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		StringArray parts = ConfigFileSplitKeyCompletely(compoundKey);
		
		StringArrayFree(parts, TRUE);
	}
}

VOID ConfigFileDump(CONFIGFILEPTR abstractConfigFile)
{
	ULONG index = 0;
	ULONG count = 0;
	struct ConfigFile* configFile = (struct ConfigFile*)abstractConfigFile;
	if( configFile != NULL )
	{
		count = SectionStoreSectionCount(configFile->sectionStore);
		for( index = 0; index < count; index++ )
		{
			SECTIONPTR section = SectionStoreSectionAt(configFile->sectionStore, index);
			SectionDump(section);
		}
	}
}

STATIC LINEPTR configFileReadLine(BPTR file)
{
	UBYTE* buffer = AllocVec(512, MEMF_CLEAR);
	ULONG bufLength = 512;
	ULONG bytesReadTotal = 0;
	UBYTE* read = NULL;
	struct Line* result = NULL;

	// read the whole line including continuation
	do
	{
		read = FGets(file, &(buffer[bytesReadTotal]), bufLength-bytesReadTotal);
		bytesReadTotal = strlen(buffer);
	} 
	while( read != NULL && bytesReadTotal >= 2 && bytesReadTotal < bufLength && buffer[bytesReadTotal-1] == '\n' && buffer[bytesReadTotal-2] == '\\' );
	
	
	// make a line
	if( bytesReadTotal > 0 )
	{
		buffer[bytesReadTotal] = '\0';
		result = LineNew(buffer);
	}
		
	FreeVec(buffer);
	return result;	
}

STATIC SECTIONPTR findOrCreateSection(SECTIONSTOREPTR sectionStore, CONST_STRPTR compoundKey)
{
	// now get the section
	StringArray canonicalParts = ConfigFileSplitKeyForVar(compoundKey);
	SECTIONPTR section = section = SectionStoreGetSection(sectionStore, StringArrayValues(canonicalParts)[0]);
	if( section == NULL )
	{
		StringArray separateParts = ConfigFileSplitKeyCompletely(compoundKey);
		CONST_STRPTR sectionLineText = NULL;
		LINEPTR sectionLine = NULL;
		
		section = SectionCreateWithNameAndSubname(StringArrayValues(separateParts)[0], StringArrayValues(separateParts)[1]);
		sectionLineText = SectionSerialize(section);
		sectionLine = LineNew(sectionLineText);
		SectionAddSectionLine(section, sectionLine);
		FreeVec((STRPTR)sectionLineText);
		SectionStoreAddSection(sectionStore, section); //section store will free it for us
		StringArrayFree(separateParts, TRUE);
	}
	StringArrayFree(canonicalParts, TRUE);
	return section;
}