/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include "xaframeworkmgr.h"

#include <stdio.h>

#include <string.h>

/* Default line width permitted in the cfg file + 2 to hold "\r\n"*/

#define LINEWIDTH 82

typedef enum

{

    FWMgrTagNone,

    FWMgrTagURIScheme,

    FWMgrTagFileExt

} FWMgrTagType;

/* Config file location */

/* Tags used for parsing */

const char mediaPlayerBeginTag[] = "<mediaplayer>";

const char mediaPlayerEndTag[] = "</mediaplayer>";

const char mediaRecorderBeginTag[] = "<mediarecorder>";

const char mediaRecorderEndTag[] = "</mediarecorder>";

const char mediaFrameworkMmfBeginTag[] = "<mmf>";

const char mediaFrameworkMmfEndTag[] = "</mmf>";

const char mediaFrameworkGstBeginTag[] = "<gst>";

const char uriSchemeBeginTag[] = "<urischeme>";

const char uriSchemeEndTag[] = "</urischeme>";

const char mediaFrameworkGstEndTag[] = "</gst>";

const char fileExtBeginTag[] = "<fileext>";

const char fileExtEndTag[] = "</fileext>";

/* Local function definitions */

/* returns FWMgrTrue if processed successfully */

static FWMgrBool processConfigEntry(

        const char* buffer,

        FWMgrMOType *mediaType,

        FWMgrFwType *frameworkType,

        FWMgrTagType *tagType,

        FWMgrBool *newNode,

        FrameworkMap **node);

/* returns FWMgrTrue if processed successfully */

static FWMgrBool processTagType(

        const char* buffer,

        FWMgrFwType *frameworkType,

        FWMgrTagType *tagType,

        FrameworkMap **node);

/* returns FWMgrTrue if processed successfully */

static FWMgrBool tokenizeTag(FWMgrTagType tagType, const char* buffer, FrameworkMap **node);

/* Crates a default rules config file */

static int createDefaultRules(const char * filename);

/* Global functions from header file */

/* FrameworkMap* XAFrameworkMgr_CreateFrameworkMap

 * Description: Creates a list of framework and use-case map.

 */

FrameworkMap* XAFrameworkMgr_CreateFrameworkMap()

{

    char buffer[LINEWIDTH];

    int readSize;

    int lineNumber = 0;

    FWMgrBool processedEntry = FWMgrTrue;

    FWMgrMOType currentMediaType = FWMgrMOUnknown;

    FWMgrFwType currentFrameworkType = FWMgrFWUknown;

    FWMgrTagType currentTagType = FWMgrTagNone;

    FrameworkMap *curNode = NULL;

    FWMgrBool newNode;

    FrameworkMap *frameworkMap = NULL;

    FILE* fp = fopen(configFileLocation, "r");

    if (fp == NULL)

        {

        createDefaultRules(configFileLocation);

        }

    if (fp != NULL)

    {

        while((fgets(buffer, LINEWIDTH, fp) != NULL) && processedEntry)

        {

            /* keep looping until NULL pointer OR error... */

            lineNumber++;

            readSize = strlen(buffer);

            /* Ignore comments line */

            if (buffer[0] == '#')

                continue;

            /* Ignore replace "\r\n" with '\0' */

            if ((readSize >= 2) && (buffer[readSize-2]=='\r') && (buffer[readSize-1]=='\n'))

                buffer[readSize-2]='\0';

            /* Ignore new line... */

            if (readSize == 2)

                continue;

            processedEntry = processConfigEntry(

                                buffer,

                                &currentMediaType,

                                &currentFrameworkType,

                                &currentTagType,

                                &newNode,

                                &curNode);

            if (newNode)

            {

                /*Just link to the last element in the chain*/

                if (!frameworkMap)

                {

                    frameworkMap = curNode;

                }

                else

                {

                    FrameworkMap *lastNode = frameworkMap;

                    while (lastNode->next)

                    {

                        lastNode = lastNode->next;

                    }

                    lastNode->next = curNode;

                }

            }

        }

        fclose(fp);

    }

    else

    {

        printf("unable to open config file!\n");

    }

    return frameworkMap;

}

#ifdef _DEBUG

/* void XAFrameworkMgr_DumpFrameworkMap

 * Description: Prints map to std console.

 */

void XAFrameworkMgr_DumpFrameworkMap(FrameworkMap *map)

{

    FrameworkMap *node = map;

    int i;

    int loopIndex = 0;

    while (node)

    {

        loopIndex++;

        printf("%d>", loopIndex);

        if (node->moType == FWMgrMOPlayer)

            printf("MediaPlayer-");

        else if (node->moType == FWMgrMORecorder)

            printf("MediaRecrdr-");

        else

            printf("UKNOWN-");

        if (node->fwType == FWMgrFWMMF)

            printf("MMF-");

        else if (node->fwType == FWMgrFWGST)

            printf("GST-");

        else

            printf("UKNOWN-");

        printf("Scheme[");

        for(i=0;i<node->uriSchemeCount;i++)

            printf(" %s", node->uriSchemes[i]);

        printf("]FileExt[");

        for(i=0;i<node->fileExtCount;i++)

            printf(" %s", node->fileExts[i]);

        printf("]\n");

        node = node->next;

    }

}

#endif

/* void XAFrameworkMgr_DeleteFrameworkMap

 * Description: Deletes the list of framework and use-case map.

 */

void XAFrameworkMgr_DeleteFrameworkMap(FrameworkMap **map)

{

    FrameworkMap *node = *map;

    FrameworkMap *nextNode = NULL;

    int i;

    while (node)

    {

        for(i=0;i<node->uriSchemeCount;i++)

            free (node->uriSchemes[i]);

        free (node->uriSchemes);

        for(i=0;i<node->fileExtCount;i++)

            free (node->fileExts[i]);

        free (node->fileExts);

        nextNode = node->next;

        free (node);

        node = nextNode;

    }

    *map = NULL;

}

/* FWMgrFwType XAFrameworkMgr_GetFramework

 * Description: Returns the framework enum that handles uri.

 */

FWMgrFwType XAFrameworkMgr_GetFramework(

                    FrameworkMap *map,

                    const char *uri,

                    FWMgrMOType mediaObject)

{

    FWMgrFwType retVal = FWMgrFWUknown;

    char fileScheme[] = "file";

    char *uriScheme = NULL;

    char *fileExt = NULL;

    FrameworkMap *node = map;

    FWMgrBool uriMatchFound = FWMgrFalse;

    FWMgrBool fileExtMatchFound = FWMgrFalse;

    int i = 0;

    int copyLen = 0;

    if (!map || !uri)

    {

        /* TODO Log invalid uri */

        return retVal;

    }

    /* Get uri scheme */

    uriScheme = strchr(uri, ':');

    if ( uriScheme == NULL)

    {

        /* TODO Log invalid uri */

        return retVal;

    }

    copyLen = (uriScheme - uri);

    uriScheme = (char*)calloc(copyLen + 1, sizeof(char));

    strncpy(uriScheme, uri, copyLen);

    uriScheme[copyLen] = '\0'; /*Null terminate it*/

    if (strcasecmp(uriScheme, fileScheme) == 0)

    {

        /* Get uri extension */

        char* dotLoc = strrchr(uri, '.');

        if ( dotLoc == NULL)

        {

            /* TODO Log invalid uri */

            free(uriScheme);

            return retVal;

        }

        /* We need to add 1 to exclude '.'*/

        copyLen = strlen(uri) - (dotLoc + 1 - uri);

        fileExt = (char*)calloc(copyLen + 1, sizeof(char));

        strncpy(fileExt, dotLoc + 1, copyLen);

        fileExt[copyLen] = '\0'; /*Null terminate it*/

    }

    while (node)

    {

        if (mediaObject == node->moType)

            {

            uriMatchFound = FWMgrFalse;

            fileExtMatchFound = FWMgrFalse;

            /* Match for uri*/

            for(i = 0; i < node->uriSchemeCount; i++)

            {

                if (strcasecmp(uriScheme, node->uriSchemes[i]) == 0)

                    {

                        uriMatchFound = FWMgrTrue;

                        break;

                    }

            }

            /* if uri scheme is not file, we only need to check for uri */

            if (!fileExt)

            {

                fileExtMatchFound = FWMgrTrue;

            }

            else

            {

                for(i = 0; i < node->fileExtCount; i++)

                {

                    if (strcasecmp(fileExt, node->fileExts[i]) == 0)

                    {

                        fileExtMatchFound = FWMgrTrue;

                        break;

                    }

                }

            }

            if ((uriMatchFound == FWMgrTrue) &&

                (fileExtMatchFound == FWMgrTrue))

                {

                    retVal = node->fwType;

                    break;

                }

            }

        node = node->next;

    }

    free(uriScheme);

    free(fileExt);

    return retVal;

}

/* Local functions */

/* FWMgrBool processConfigEntry

 * Description: Processes a single line entry from the config file.

 */

FWMgrBool processConfigEntry(

        const char* buffer,

        FWMgrMOType *mediaType,

        FWMgrFwType *frameworkType,

        FWMgrTagType *tagType,

        FWMgrBool *newNode,

        FrameworkMap **node)

{

    FWMgrBool processedSuccessfully = FWMgrTrue;

    *newNode = FWMgrFalse;

    switch (*mediaType)

    {

        case FWMgrMOUnknown:

        {

            if (strcmp(buffer, mediaPlayerBeginTag) == 0)

            {

                *mediaType = FWMgrMOPlayer;

                *frameworkType = FWMgrFWUknown;

                *tagType = FWMgrTagNone;

                *node = NULL;

            }

            else if (strcmp(buffer, mediaRecorderBeginTag) == 0)

            {

                *mediaType = FWMgrMORecorder;

                *frameworkType = FWMgrFWUknown;

                *tagType = FWMgrTagNone;

                *node = NULL;

            }

        }

            break;

        case FWMgrMOPlayer:

        case FWMgrMORecorder:

        {

            switch (*frameworkType)

            {

                case FWMgrFWUknown:

                {

                    if ((*mediaType == FWMgrMOPlayer) && (strcmp(buffer, mediaPlayerEndTag) == 0))

                        *mediaType = FWMgrMOUnknown;

                    else if ((*mediaType == FWMgrMORecorder) && (strcmp(buffer, mediaRecorderEndTag) == 0))

                        *mediaType = FWMgrMOUnknown;

                    else if ( (strcmp(buffer, mediaFrameworkMmfBeginTag) == 0) ||

                              (strcmp(buffer, mediaFrameworkGstBeginTag) == 0) )

                    {

                        *frameworkType = FWMgrFWMMF;

                        if (strcmp(buffer, mediaFrameworkGstBeginTag) == 0)

                            *frameworkType = FWMgrFWGST;

                        if (*node)

                        {

                            printf("Fatal error error. Entry already exists and creating another one!!!");

                            return FWMgrFalse;

                        }

                        *node = (FrameworkMap*)calloc(1, sizeof(FrameworkMap));

                        if (!(*node))

                        {

                            printf("Fatal error. No memory to create an Entry!!!");

                            return FWMgrFalse;

                        }

                        *newNode = FWMgrTrue;

                        (*node)->moType = *mediaType;

                        (*node)->fwType = *frameworkType;

                    }

                }

                    break;

                case FWMgrFWMMF:

                {

                    processedSuccessfully = processTagType(

                                                buffer,

                                                frameworkType,

                                                tagType,

                                                node);

                }

                    break;

                case FWMgrFWGST:

                {

                    processedSuccessfully = processTagType(

                                                buffer,

                                                frameworkType,

                                                tagType,

                                                node);

                }

                    break;

                default:

                    processedSuccessfully = FWMgrFalse;

                    break;

            };

        }

            break;

        default:

            processedSuccessfully = FWMgrFalse;

            break;

    };

    return processedSuccessfully;

}

/* FWMgrBool processTagType

 * Description: Processes a framework type, uri, file tags entry from the config file.

 */

FWMgrBool processTagType(const char* buffer,

        FWMgrFwType *frameworkType,

        FWMgrTagType *tagType,

        FrameworkMap **node)

{

    FWMgrBool processedSuccessfully = FWMgrTrue;

    switch (*tagType)

    {

        case FWMgrTagNone:

        {

            if (((*frameworkType == FWMgrFWMMF) && (strcmp(buffer, mediaFrameworkMmfEndTag) == 0)) ||

                ((*frameworkType == FWMgrFWGST) && (strcmp(buffer, mediaFrameworkGstEndTag) == 0)))

            {

                *node = NULL;

                *frameworkType = FWMgrFWUknown;

            }

            else if (strcmp(buffer, uriSchemeBeginTag) == 0)

                *tagType = FWMgrTagURIScheme;

            else if (strcmp(buffer, fileExtBeginTag) == 0)

                *tagType = FWMgrTagFileExt;

        }

            break;

        case FWMgrTagURIScheme:

        {

            if (strcmp(buffer, uriSchemeEndTag) == 0)

                *tagType = FWMgrTagNone;

            else

            {

                processedSuccessfully = FWMgrFalse;

                if (*node)

                    processedSuccessfully = tokenizeTag(FWMgrTagURIScheme, buffer, node);

            }

        }

            break;

        case FWMgrTagFileExt:

        {

            if (strcmp(buffer, fileExtEndTag) == 0)

                *tagType = FWMgrTagNone;

            else

            {

                processedSuccessfully = FWMgrFalse;

                if (*node)

                    processedSuccessfully = tokenizeTag(FWMgrTagFileExt, buffer, node);

            }

        }

            break;

        default:

            break;

    };

    return processedSuccessfully;

}

/* FWMgrBool processTagType

 * Description: Processes a framework type, uri, file tags entry from the config file.

 */

FWMgrBool tokenizeTag(FWMgrTagType tagType, const char* buffer, FrameworkMap **node)

{

    char* tempStartPtr = /*const_cast<char*>*/(char*)(buffer);

    char* tempEndPtr = /*const_cast<char*>*/(char*)(buffer);

    int index = 0;

    int strLen = 0;

    if (tagType == FWMgrTagURIScheme)

    {

        (*node)->uriSchemeCount = atoi(buffer);

        (*node)->uriSchemes =  (char**)calloc((*node)->uriSchemeCount,  sizeof (*((*node)->uriSchemes)));

        if (!(*node)->uriSchemes)

        {

            printf("Fatal error. No memory to create an Entry!!!");

            return FWMgrFalse;

        }

    }

    else if (tagType == FWMgrTagFileExt)

    {

        (*node)->fileExtCount = atoi(buffer);

        (*node)->fileExts =  (char**)calloc((*node)->fileExtCount,  sizeof (*((*node)->fileExts)));

        if (!(*node)->fileExts)

        {

            printf("Fatal error. No memory to create an Entry!!!");

            return FWMgrFalse;

        }

    }

    else

        return FWMgrFalse;

    /*Find the index of :*/

    tempStartPtr = strchr(tempStartPtr, ',');

    index = 0;

    while (tempStartPtr && (strlen(tempStartPtr) > 1))

    {

        tempStartPtr++; /* Ignore separator ','*/

        tempEndPtr = strchr(tempStartPtr, ',');

        strLen = (tempEndPtr - tempStartPtr) + 1; /* To hold null terminator */

        if (strLen > 0)

        {

            if (tagType == FWMgrTagURIScheme)

            {

                (*node)->uriSchemes[index] = (char*)calloc(strLen, sizeof(char));

                strncpy((*node)->uriSchemes[index], tempStartPtr, strLen);

                (*node)->uriSchemes[index][strLen-1] = '\0'; /*Null terminate it*/

                index++;

            }

            else if (tagType == FWMgrTagFileExt)

            {

                (*node)->fileExts[index] = (char*)calloc(strLen, sizeof(char));

                strncpy((*node)->fileExts[index], tempStartPtr, strLen);

                (*node)->fileExts[index][strLen-1] = '\0'; /*Null terminate it*/

                index++;

            }

        }

        tempStartPtr = tempEndPtr;