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{{>licenseInfo}}
/**
 * Providing a Oauth2 Class and a ReplyServer for the Oauth2 authorization code flow. 
 */
#ifndef {{prefix}}_OAUTH2_H
#define {{prefix}}_OAUTH2_H

#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 

{{#cppNamespaceDeclarations}}
namespace {{this}} {
{{/cppNamespaceDeclarations}}

class oauthToken
{
public:
    oauthToken(QString token, int expiresIn, QString scope, QString tokenType) : m_token(token), m_scope(scope), m_type(tokenType){
        m_validUntil = time(nullptr) + expiresIn;
    }
    oauthToken(){
        m_validUntil = time(nullptr) - 1;
    }
    QString getToken(){return m_token;};
    QString getScope(){return m_scope;};
    QString getType(){return m_type;};
    bool isValid(){return time(nullptr) < m_validUntil;};

private:
    QString m_token;
    time_t m_validUntil;
    QString m_scope;
    QString m_type;
};

class ReplyServer : public QTcpServer
{
    Q_OBJECT
public:
    explicit ReplyServer(QObject *parent = nullptr);
    void setReply(QByteArray reply){m_reply = reply;};
    void run();
private:
    QByteArray m_reply;

Q_SIGNALS:
    void dataReceived(QMap);

public Q_SLOTS:
    void onConnected();
    void read();
    void start();
    void stop();
};

//Base class
class OauthBase : public QObject
{
    Q_OBJECT
public: 
    OauthBase(QObject* parent = nullptr) : QObject(parent) {};
    oauthToken getToken(QString scope);
    void addToken(oauthToken token);
    void removeToken(QString scope);
    bool linked(){return m_linked;};
    virtual void link()=0;
    virtual void unlink()=0;

protected:
    QMap m_oauthTokenMap;
    QUrl m_authUrl;
    QUrl m_tokenUrl;
    QString m_scope, m_accessType, m_state, m_redirectUri, m_clientId, m_clientSecret;
    bool m_linked;

public Q_SLOTS:
    virtual void authenticationNeededCallback()=0;
    void onFinish(QNetworkReply *rep);

Q_SIGNALS:
    void authenticationNeeded();
    void tokenReceived();
};

// Authorization code flow
class OauthCode : public OauthBase
{
    Q_OBJECT
public:
    OauthCode(QObject *parent = nullptr);
    void link() override;
    void unlink() override;
    void setVariables(QString authUrl, QString tokenUrl, QString scope, QString state, QString redirectUri, QString clientId, QString clientSecret, QString accessType = "");

private:
    ReplyServer m_server;

public Q_SLOTS:
    void authenticationNeededCallback() override;
    void onVerificationReceived(const QMap response);

};

// Implicit flow
class OauthImplicit : public OauthBase
{
    Q_OBJECT
public:
    OauthImplicit(QObject *parent = nullptr);
    void link() override;
    void unlink() override;
    void setVariables(QString authUrl, QString scope, QString state, QString redirectUri, QString clientId, QString accessType = "");

private:
    ReplyServer m_server;

public Q_SLOTS:
    void authenticationNeededCallback() override;
    void ImplicitTokenReceived(const QMap response);
};

//client credentials flow
class OauthCredentials : public OauthBase
{
    Q_OBJECT
public:
    OauthCredentials(QObject *parent = nullptr);
    void link() override;
    void unlink() override;
    void setVariables(QString tokenUrl, QString scope, QString clientId, QString clientSecret);

public Q_SLOTS:
    void authenticationNeededCallback() override;

};

//resource owner password flow
class OauthPassword : public OauthBase
{
    Q_OBJECT
public:
    OauthPassword(QObject *parent = nullptr);
    void link() override;
    void unlink() override;
    void setVariables(QString tokenUrl, QString scope, QString clientId, QString clientSecret, QString username, QString password);

private:
    QString m_username, m_password;

public Q_SLOTS:
    void authenticationNeededCallback() override;

};


{{#cppNamespaceDeclarations}}
} // namespace {{this}}
{{/cppNamespaceDeclarations}}
#endif // {{prefix}}_OAUTH2_H