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 */

#include "PluginObject.h"

#include "TestObject.h"

#include <assert.h>

#include <stdio.h>

static void pluginInvalidate(NPObject *obj);

static bool pluginHasProperty(NPObject *obj, NPIdentifier name);

static bool pluginHasMethod(NPObject *obj, NPIdentifier name);

static bool pluginGetProperty(NPObject *obj, NPIdentifier name, NPVariant *variant);

static bool pluginSetProperty(NPObject *obj, NPIdentifier name, const NPVariant *variant);

static bool pluginInvoke(NPObject *obj, NPIdentifier name, const NPVariant *args, uint32_t argCount, NPVariant *result);

static bool pluginInvokeDefault(NPObject *obj, const NPVariant *args, uint32_t argCount, NPVariant *result);

static NPObject *pluginAllocate(NPP npp, NPClass *theClass);

static void pluginDeallocate(NPObject *obj);

NPNetscapeFuncs *browser;

static NPClass pluginClass = { 

    NP_CLASS_STRUCT_VERSION,

    pluginAllocate, 

    pluginDeallocate, 

    pluginInvalidate,

    pluginHasMethod,

    pluginInvoke,

    pluginInvokeDefault,

    pluginHasProperty,

    pluginGetProperty,

    pluginSetProperty,

};

NPClass *getPluginClass(void)

{

    return &pluginClass;

}

static bool identifiersInitialized = false;

#define ID_PROPERTY_PROPERTY        0

#define ID_PROPERTY_EVENT_LOGGING   1

#define ID_PROPERTY_HAS_STREAM      2

#define ID_PROPERTY_TEST_OBJECT     3

#define ID_PROPERTY_LOG_DESTROY     4

#define NUM_PROPERTY_IDENTIFIERS    5

static NPIdentifier pluginPropertyIdentifiers[NUM_PROPERTY_IDENTIFIERS];

static const NPUTF8 *pluginPropertyIdentifierNames[NUM_PROPERTY_IDENTIFIERS] = {

    "property",

    "eventLoggingEnabled",

    "hasStream",

    "testObject",

    "logDestroy",

};

#define ID_TEST_CALLBACK_METHOD     0

#define ID_TEST_GETURL              1

#define ID_REMOVE_DEFAULT_METHOD    2

#define ID_TEST_DOM_ACCESS          3

#define ID_TEST_GET_URL_NOTIFY      4

#define ID_TEST_INVOKE_DEFAULT      5

#define ID_DESTROY_STREAM           6

#define ID_TEST_ENUMERATE           7

#define NUM_METHOD_IDENTIFIERS      8

static NPIdentifier pluginMethodIdentifiers[NUM_METHOD_IDENTIFIERS];

static const NPUTF8 *pluginMethodIdentifierNames[NUM_METHOD_IDENTIFIERS] = {

    "testCallback",

    "getURL",

    "removeDefaultMethod",

    "testDOMAccess",

    "getURLNotify",

    "testInvokeDefault",

    "destroyStream",

    "testEnumerate"

};

static NPUTF8* createCStringFromNPVariant(const NPVariant *variant)

{

    size_t length = NPVARIANT_TO_STRING(*variant).UTF8Length;

    NPUTF8* result = (NPUTF8*)malloc(length + 1);

    memcpy(result, NPVARIANT_TO_STRING(*variant).UTF8Characters, length);

    result[length] = '\0';

    return result;

}

static void initializeIdentifiers(void)

{

    browser->getstringidentifiers(pluginPropertyIdentifierNames, NUM_PROPERTY_IDENTIFIERS, pluginPropertyIdentifiers);

    browser->getstringidentifiers(pluginMethodIdentifierNames, NUM_METHOD_IDENTIFIERS, pluginMethodIdentifiers);

}

static bool pluginHasProperty(NPObject *obj, NPIdentifier name)

{

    for (int i = 0; i < NUM_PROPERTY_IDENTIFIERS; i++)

        if (name == pluginPropertyIdentifiers[i])

            return true;

    return false;

}

static bool pluginHasMethod(NPObject *obj, NPIdentifier name)

{

    for (int i = 0; i < NUM_METHOD_IDENTIFIERS; i++)

        if (name == pluginMethodIdentifiers[i])

            return true;

    return false;

}

static bool pluginGetProperty(NPObject *obj, NPIdentifier name, NPVariant *variant)

{

    if (name == pluginPropertyIdentifiers[ID_PROPERTY_PROPERTY]) {

        STRINGZ_TO_NPVARIANT("property", *variant);

        return true;

    } else if (name == pluginPropertyIdentifiers[ID_PROPERTY_EVENT_LOGGING]) {

        BOOLEAN_TO_NPVARIANT(((PluginObject *)obj)->eventLogging, *variant);

        return true;

    } else if (name == pluginPropertyIdentifiers[ID_PROPERTY_LOG_DESTROY]) {

        BOOLEAN_TO_NPVARIANT(((PluginObject *)obj)->logDestroy, *variant);

        return true;            

    } else if (name == pluginPropertyIdentifiers[ID_PROPERTY_HAS_STREAM]) {

        BOOLEAN_TO_NPVARIANT(((PluginObject *)obj)->stream != 0, *variant);

        return true;

    } else if (name == pluginPropertyIdentifiers[ID_PROPERTY_TEST_OBJECT]) {

        NPObject *testObject = ((PluginObject *)obj)->testObject;

        browser->retainobject(testObject);

        OBJECT_TO_NPVARIANT(testObject, *variant);

        return true;

    }

    return false;

}

static bool pluginSetProperty(NPObject *obj, NPIdentifier name, const NPVariant *variant)

{

    if (name == pluginPropertyIdentifiers[ID_PROPERTY_EVENT_LOGGING]) {

        ((PluginObject *)obj)->eventLogging = NPVARIANT_TO_BOOLEAN(*variant);

        return true;

    } else if (name == pluginPropertyIdentifiers[ID_PROPERTY_LOG_DESTROY]) {

        ((PluginObject *)obj)->logDestroy = NPVARIANT_TO_BOOLEAN(*variant);

        return true;

    }

    return false;

}

static void testDOMAccess(PluginObject *obj)

{

    // Get plug-in's DOM element

    NPObject *elementObject;

    if (browser->getvalue(obj->npp, NPNVPluginElementNPObject, &elementObject) == NPERR_NO_ERROR) {

        // Get style

        NPVariant styleVariant;

        NPIdentifier styleIdentifier = browser->getstringidentifier("style");

        if (browser->getproperty(obj->npp, elementObject, styleIdentifier, &styleVariant) && NPVARIANT_IS_OBJECT(styleVariant)) {

            // Set style.border

            NPIdentifier borderIdentifier = browser->getstringidentifier("border");

            NPVariant borderVariant;

            STRINGZ_TO_NPVARIANT("3px solid red", borderVariant);

            browser->setproperty(obj->npp, NPVARIANT_TO_OBJECT(styleVariant), borderIdentifier, &borderVariant);

            browser->releasevariantvalue(&styleVariant);

        }

        browser->releaseobject(elementObject);

    }

}

static bool pluginInvoke(NPObject *header, NPIdentifier name, const NPVariant *args, uint32_t argCount, NPVariant *result)

{

    PluginObject *obj = (PluginObject *)header;

    if (name == pluginMethodIdentifiers[ID_TEST_CALLBACK_METHOD]) {

        // call whatever method name we're given

        if (argCount > 0 && NPVARIANT_IS_STRING(args[0])) {

            NPObject *windowScriptObject;

            browser->getvalue(obj->npp, NPNVWindowNPObject, &windowScriptObject);

            NPUTF8* callbackString = createCStringFromNPVariant(&args[0]);

            NPIdentifier callbackIdentifier = browser->getstringidentifier(callbackString);

            free(callbackString);

            NPVariant browserResult;

            browser->invoke(obj->npp, windowScriptObject, callbackIdentifier, 0, 0, &browserResult);

            browser->releasevariantvalue(&browserResult);

            VOID_TO_NPVARIANT(*result);

            return true;

        }

    } else if (name == pluginMethodIdentifiers[ID_TEST_GETURL]) {

        if (argCount == 2 && NPVARIANT_IS_STRING(args[0]) && NPVARIANT_IS_STRING(args[1])) {

            NPUTF8* urlString = createCStringFromNPVariant(&args[0]);

            NPUTF8* targetString = createCStringFromNPVariant(&args[1]);

            browser->geturl(obj->npp, urlString, targetString);

            free(urlString);

            free(targetString);

            VOID_TO_NPVARIANT(*result);

            return true;

        } else if (argCount == 1 && NPVARIANT_IS_STRING(args[0])) {

            NPUTF8* urlString = createCStringFromNPVariant(&args[0]);

            browser->geturl(obj->npp, urlString, 0);

            free(urlString);

            VOID_TO_NPVARIANT(*result);

            return true;

        }

    } else if (name == pluginMethodIdentifiers[ID_REMOVE_DEFAULT_METHOD]) {

        pluginClass.invokeDefault = 0;

        VOID_TO_NPVARIANT(*result);

        return true;

    } else if (name == pluginMethodIdentifiers[ID_TEST_DOM_ACCESS]) {

        testDOMAccess(obj);

        VOID_TO_NPVARIANT(*result);

        return true;

    } else if (name == pluginMethodIdentifiers[ID_TEST_GET_URL_NOTIFY]) {

        if (argCount == 3

          && NPVARIANT_IS_STRING(args[0])

          && (NPVARIANT_IS_STRING(args[1]) || NPVARIANT_IS_NULL(args[1]))

          && NPVARIANT_IS_STRING(args[2])) {

            NPUTF8* urlString = createCStringFromNPVariant(&args[0]);

            NPUTF8* targetString = (NPVARIANT_IS_STRING(args[1]) ? createCStringFromNPVariant(&args[1]) : NULL);

            NPUTF8* callbackString = createCStringFromNPVariant(&args[2]);

            NPIdentifier callbackIdentifier = browser->getstringidentifier(callbackString);

            browser->geturlnotify(obj->npp, urlString, targetString, callbackIdentifier);

            free(urlString);

            free(targetString);

            free(callbackString);

            VOID_TO_NPVARIANT(*result);

            return true;

        }

    } else if (name == pluginMethodIdentifiers[ID_TEST_INVOKE_DEFAULT] && NPVARIANT_IS_OBJECT(args[0])) {

        NPObject *callback = NPVARIANT_TO_OBJECT(args[0]);

        NPVariant args[1];

        NPVariant browserResult;

        STRINGZ_TO_NPVARIANT("test", args[0]);

        bool retval = browser->invokeDefault(obj->npp, callback, args, 1, &browserResult);

        if (retval)

            browser->releasevariantvalue(&browserResult);

        BOOLEAN_TO_NPVARIANT(retval, *result);

        return true;

    } else if (name == pluginMethodIdentifiers[ID_TEST_ENUMERATE]) {

        if (argCount == 2 && NPVARIANT_IS_OBJECT(args[0]) && NPVARIANT_IS_OBJECT(args[1])) {

            uint32_t count;            

            NPIdentifier* identifiers;

            if (browser->enumerate(obj->npp, NPVARIANT_TO_OBJECT(args[0]), &identifiers, &count)) {

                NPObject* outArray = NPVARIANT_TO_OBJECT(args[1]);

                NPIdentifier pushIdentifier = browser->getstringidentifier("push");

                for (uint32_t i = 0; i < count; i++) {

                    NPUTF8* string = browser->utf8fromidentifier(identifiers[i]);

                    if (!string)

                        continue;

                    NPVariant args[1];

                    STRINGZ_TO_NPVARIANT(string, args[0]);

                    NPVariant browserResult;

                    browser->invoke(obj->npp, outArray, pushIdentifier, args, 1, &browserResult);

                    browser->releasevariantvalue(&browserResult);

                    browser->memfree(string);

                }

                browser->memfree(identifiers);

            }

            VOID_TO_NPVARIANT(*result);

            return true;            

        }

    } else if (name == pluginMethodIdentifiers[ID_DESTROY_STREAM]) {

        NPError npError = browser->destroystream(obj->npp, obj->stream, NPRES_USER_BREAK);

        INT32_TO_NPVARIANT(npError, *result);

        return true;        

    } 

    return false;

}

static bool pluginInvokeDefault(NPObject *obj, const NPVariant *args, uint32_t argCount, NPVariant *result)

{

    INT32_TO_NPVARIANT(1, *result);

    return true;

}

static void pluginInvalidate(NPObject *obj)

{

}

static NPObject *pluginAllocate(NPP npp, NPClass *theClass)

{

    PluginObject *newInstance = (PluginObject*)malloc(sizeof(PluginObject));

    if (!identifiersInitialized) {

        identifiersInitialized = true;

        initializeIdentifiers();

    }

    newInstance->npp = npp;

    newInstance->testObject = browser->createobject(npp, getTestClass());

    newInstance->eventLogging = FALSE;

    newInstance->logDestroy = FALSE;

    newInstance->logSetWindow = FALSE;

    newInstance->returnErrorFromNewStream = FALSE;

    newInstance->stream = 0;

    newInstance->firstUrl = NULL;

    newInstance->firstHeaders = NULL;

    newInstance->lastUrl = NULL;

    newInstance->lastHeaders = NULL;

    return (NPObject *)newInstance;

}

static void pluginDeallocate(NPObject *header) 

{

    PluginObject* obj = (PluginObject*)header;

    browser->releaseobject(obj->testObject);

    free(obj->firstUrl);

    free(obj->firstHeaders);

    free(obj->lastUrl);

    free(obj->lastHeaders);

    free(obj);

}

void handleCallback(PluginObject* object, const char *url, NPReason reason, void *notifyData)

{

    assert(object);

    NPVariant args[2];

    NPObject *windowScriptObject;

    browser->getvalue(object->npp, NPNVWindowNPObject, &windowScriptObject);

    NPIdentifier callbackIdentifier = notifyData;

    INT32_TO_NPVARIANT(reason, args[0]);

    char *strHdr = NULL;

    if (object->firstUrl && object->firstHeaders && object->lastUrl && object->lastHeaders) {

        // Format expected by JavaScript validator: four fields separated by \n\n:

        // First URL; first header block; last URL; last header block.

        // Note that header blocks already end with \n due to how NPStream::headers works.

        int len = strlen(object->firstUrl) + 2

            + strlen(object->firstHeaders) + 1

            + strlen(object->lastUrl) + 2

            + strlen(object->lastHeaders) + 1;

        strHdr = (char*)malloc(len + 1);

        snprintf(strHdr, len + 1, "%s\n\n%s\n%s\n\n%s\n",

                 object->firstUrl, object->firstHeaders, object->lastUrl, object->lastHeaders);

        STRINGN_TO_NPVARIANT(strHdr, len, args[1]);

    } else

        NULL_TO_NPVARIANT(args[1]);

    NPVariant browserResult;

    browser->invoke(object->npp, windowScriptObject, callbackIdentifier, args, 2, &browserResult);

    browser->releasevariantvalue(&browserResult);

    free(strHdr);

}

void notifyStream(PluginObject* object, const char *url, const char *headers)

{

    if (object->firstUrl == NULL) {

        if (url)

            object->firstUrl = strdup(url);

        if (headers)

            object->firstHeaders = strdup(headers);

    } else {

        free(object->lastUrl);

        free(object->lastHeaders);

        object->lastUrl = (url ? strdup(url) : NULL);

        object->lastHeaders = (headers ? strdup(headers) : NULL);

    }

}