core.cpp

/**
 *  Core.cpp
 * 
 *  Implementation file for the context class
 * 
 *  @author Emiel Bruijntjes <emiel.bruijntjes@copernica.com>
 *  @copyright 2025 - 2026 Copernica BV
 */

/**
 *  Dependencies
 */
#include "core.h"
#include "fromphp.h"
#include "php_variable.h"
#include "scope.h"
#include "php_object.h"
#include "php_exception.h"
#include "script.h"
#include "names.h"

/**
 *  Begin of namespace
 */
namespace JS {

/**
 *  Constructor
 */
Core::Core() : _platform(Platform::instance()), _isolate(this)
{
    // when we access the isolate, we need a scope
    v8::HandleScope scope(_isolate);
    
    // create a context
    v8::Local<v8::Context> context(v8::Context::New(_isolate));

    // store pointer to ourselves
    context->SetAlignedPointerInEmbedderData(0, this);

    // we want to persist the context
    _context.Reset(_isolate, context);
}

/**
 *  Given an isolate, it is possible to upgrade to the full context
 *  @return std::shared_ptr
 */
std::shared_ptr<Core> Core::upgrade(v8::Isolate *isolate)
{
    // get the context
    // @todo or should this sometimes be be GetCreationContext()????
    auto context = isolate->GetCurrentContext();
    
    // get the core object
    auto *core = static_cast<Core *>(context->GetAlignedPointerFromEmbedderData(0));
    
    // get the shared pointer
    return core->shared_from_this();
}

/**
 *  Wrap a certain PHP object into a javascript object
 *  @param  object      MUST be an array or object!
 *  @return v8::Local<v8::Value>
 */
v8::Local<v8::Value> Core::wrap(const Php::Value &object)
{
    // if the object is already known to be a JS\Object
    auto *instance = PhpBase::unwrap(this, object);
    
    // was this possible? then we reuse the original handle
    if (instance != nullptr) return instance->handle();
    
    // check the prototypes that we have
    return _isolate.prototype(object).apply(object);
}

/**
 *  Assign a variable to the javascript context
 *  @param  name        name of property to assign  required
 *  @param  value       value to be assigned
 *  @param  attribytes  property attributes
 *  @return bool
 */
bool Core::assign(const Php::Value &name, const Php::Value &value, const Php::Value &attributes)
{
    // avoid that other contexts are assigned
    if (value.instanceOf(Names::Context) || value.instanceOf(Names::Script)) return false;
    
    // scope for the context
    Scope scope(shared_from_this());

    // retrieve the global object from the context
    v8::Local<v8::Object> global(scope.global());

    // the attribute for the newly assigned property
    auto attribute = attributes.isNull() ? v8::None : static_cast<v8::PropertyAttribute>(attributes.numericValue());
    
    // convert the property to a javascript name
    v8::Local<v8::Value> property = FromPhp(_isolate, name.clone(Php::Type::String));

    // store the value
    v8::Maybe<bool> result = global->DefineOwnProperty(scope, property.As<v8::String>(), FromPhp(_isolate, value), attribute);
    
    // check for success
    return result.IsJust() && result.FromJust();
}

/**
 *  Reset the platform, start with a clean sheet
 *  @return bool
 */
void Core::reset()
{
    // when we access the isolate, we need a scope
    v8::HandleScope scope(_isolate);

    // create a context
    v8::Local<v8::Context> context(v8::Context::New(_isolate));

    // we want to persist the context
    _context.Reset(_isolate, context);
}    

/**
 *  Parse a piece of javascript code
 *  @param  source      the code to execute
 *  @param  timeout     possible timeout in seconds
 *  @return Php::Value
 *  @throws Php::Exception
 */
Php::Value Core::evaluate(const Php::Value &source, const Php::Value &timeout)
{
    // create a script
    Script script(shared_from_this(), source.clone(Php::Type::String).rawValue());
    
    // evaluate the script
    return script.execute(timeout);
}
    
/**
 *  End of namespace
 */
}