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#include "fivewin.ch"

static oGmail, hStore

function main()

	local oDlg
	local oName, cName := ""
	local oEmail, cEmail := ""
	local oPhoto, oSend
	local oConnect, oDisconnect

	hStore := readStore( hb_dirBase() + "gmail.json" )

	oGmail := TGmail():new()

	oGmail:setConfig( {;
		"client_id" => "your_client_id",;
		"client_secret" => "your_client_secret",;
		"redirect_uri" => "http://localhost:2025/";
	} )

	if !empty( hStore[ "token" ] )
		oGmail:setToken( hStore[ "token" ] )
	endif

	define dialog oDlg resource "GMAIL"

		redefine image oPhoto id 4002 of oDlg
		redefine say oName var cName id 4003 of oDlg
		redefine say oEmail var cEmail id 4004 of oDlg

		redefine button oDisconnect id 4005 of oDlg action onDisconnect( oDlg, { oPhoto, oName, oEmail, oSend, oDisconnect }, { oConnect } )
		redefine button oSend id 4006 of oDlg action onSendMail()

		redefine button oConnect id 4001 of oDlg action onConnect( oDlg, { oPhoto, oName, oEmail, oSend, oDisconnect }, { oConnect } )

		oDlg:bStart := { || updateControls( oDlg, { oPhoto, oName, oEmail, oSend, oDisconnect }, { oConnect } ) }

		oDlg:lHelpIcon := .f.

	activate dialog oDlg centered

	saveStore( hb_dirBase() + "gmail.json", hStore )

return nil

function onConnect( oDlg, aConnect, aDisconnect )

	local cToken

	if !oGmail:isAuth()
		cToken := oGmail:auth()
		if !empty( cToken )
			hStore[ "token" ] := cToken
		else
			msgStop( "Authentication failed!" )
		endif
	endif

	updateControls( oDlg, aConnect, aDisconnect )

return nil

function onDisconnect( oDlg, aConnect, aDisconnect )

	local cProfile := hb_dirBase() + "profile_gmail.jpg"

	oGmail:revoke()
	updateControls( oDlg, aConnect, aDisconnect )

	if hb_vfExists( cProfile )
		hb_vfErase( cProfile )
	endif

return nil

function onSendMail()

	if oGmail:send( "lailton@paysoft.com.br", "it is a test", "<b>Message from Gmail oAuth2</b>", .t., {} )
		msgInfo( "Mail sent!" )
	else
		msgStop( "Failed to send email. You may not have authorized the required permissions..." )
	endif

return nil

function updateControls( oDlg, aConnect, aDisconnect )

	local hUser
	local cProfile := hb_dirBase() + "profile_gmail.jpg"

	if oGmail:isAuth()
		hUser := oGmail:me()
	endif

	aEval( aConnect, { |o| o:hide() } )
	aEval( aDisconnect, { |o| o:hide() } )

	if hb_isHash( hUser )

		aEval( aConnect, {|o|o:show(),o:refresh()} )

		if !hb_vfExists( cProfile )
			oGmail:downloadUrl( hUser[ "picture" ], cProfile )
		endif

		// Load Profile Photo
		if hb_vfExists( cProfile )
			aConnect[1]:loadImage(, cProfile )
			aConnect[1]:refresh()
		endif

		aConnect[2]:setText( hUser[ "name" ] )
		aConnect[3]:setText( hUser[ "email" ] )

		aConnect[2]:update()
		aConnect[3]:update()

	else

		aEval( aDisconnect, {|o|o:show(),o:refresh()} )

	endif

	oDlg:update()

return nil

function readStore( cFile )

	local hStore

	if hb_vfExists( cFile )
		hStore := hb_jsonDecode( hb_memoRead( cFile ) )
	endif

	if !hb_isHash( hStore )
		hStore := {;
			"token" => "";
		}
	endif

return hStore

function saveStore( cFile, hStore )

	hb_memoWrit( cFile, hb_jsonEncode( hStore ) )

return hb_vfExists( cFile )

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#include "FiveWin.ch"

FUNCTION SendEmail()
   LOCAL cUrl, cData, cResponse
   LOCAL cAccessToken := "YOUR_ACCESS_TOKEN"  // Get token via OAuth2
   LOCAL cMessage := '{"message": {"subject": "Test Email", "body": {"contentType": "Text", "content": "Hello, this is a test email!"}, "toRecipients": [{"emailAddress": {"address": "example@domain.com"}}]}}'

   cUrl := "https://graph.microsoft.com/v1.0/me/sendMail"
   cData := cMessage

   cResponse := HttpPostRequest(cUrl, cData, "Authorization: Bearer " + cAccessToken)
   
   IF !Empty(cResponse)
      MsgInfo("Email sent successfully!", "Success")
   ELSE
      MsgError("Failed to send email.", "Error")
   ENDIF

RETURN

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CLASS Tgmail

   DATA cClientId // OAuth2 Client ID
   DATA cClientSecret // OAuth2 Client Secret
   DATA cRedirectUri // Redirect URI
   DATA cAccessToken // OAuth2 Access Token
   DATA cRefreshToken // OAuth2 Refresh Token
   DATA cAuthUrl // Authorization URL

   METHOD Init( cClientId, cClientSecret, cRedirectUri )
   METHOD GetAuthorizationUrl()
   METHOD GetAccessToken( cCode )
   METHOD SendEmail( cSubject, cBody, cRecipient )

ENDCLASS

// Constructor for Tgmail class
METHOD Init( cClientId, cClientSecret, cRedirectUri )
   ::cClientId := cClientId
   ::cClientSecret := cClientSecret
   ::cRedirectUri := cRedirectUri
   ::cAuthUrl := "https://accounts.google.com/o/oauth2/v2/auth?scope=https://www.googleapis.com/auth/gmail.send&response_type=code&redirect_uri=" + SELF:cRedirectUri + "&client_id=" + SELF:cClientId
   RETURN NIL

// Method to get the authorization URL
METHOD GetAuthorizationUrl()
   RETURN ::cAuthUrl

// Method to get access token using authorization code
METHOD GetAccessToken( cCode )
   LOCAL cUrl, cData, cResponse, cTokenUrl
   LOCAL aJson
   cTokenUrl := "https://oauth2.googleapis.com/token"
   cData := "code=" + cCode + ;
            "&client_id=" + ::cClientId + ;
            "&client_secret=" + ::cClientSecret + ;
            "&redirect_uri=" + ::cRedirectUri + ;
            "&grant_type=authorization_code"

   // Request to get the token
   cResponse := HttpPostRequest( cTokenUrl, cData, "" )
   IF !Empty(cResponse)
      
      aJson := JsonParse( cResponse )
      ::cAccessToken := aJson[ "access_token" ]
      ::cRefreshToken := aJson[ "refresh_token" ]
      RETURN .T.
   ELSE
      RETURN .F.
   ENDIF

// Method to send an email via GMail
METHOD SendEmail( cSubject, cBody, cRecipient )
   LOCAL cUrl, cMessage, cRaw, cResponse

   // Prepare the message in MIME format
   cRaw := "From: 'me'\r\n" + ;
           "To: " + cRecipient + "\r\n" + ;
           "Subject: " + cSubject + "\r\n" + ;
           "Content-Type: text/plain; charset=UTF-8\r\n\r\n" + ;
           cBody

   // Encode the message in base64
   cRaw := Base64Encode( cRaw )

   // Build the request body
   cMessage := '{"raw": "' + cRaw + '"}'

   // URL to send the message
   cUrl := "https://gmail.googleapis.com/upload/gmail/v1/users/me/messages/send?uploadType=multipart"

   // Send HTTP request with access token
   cResponse := HttpPostRequest( cUrl, cMessage, "Authorization: Bearer " + ::cAccessToken )
   IF !Empty(cResponse)
      RETURN .T.
   ELSE
      RETURN .F.
   ENDIF

RETURN NIL

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LOCAL oGmail
oGmail := Tgmail():New()

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oGmail:Init( "YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET", "YOUR_REDIRECT_URI" )

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LOCAL cAuthUrl
cAuthUrl := oGmail:GetAuthorizationUrl()
MsgInfo( "Visita questo URL per autorizzare l'app: " + cAuthUrl, "Autorizzazione OAuth2" )

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LOCAL cCode, lSuccess
cCode := "AUTHORIZATION_CODE_OBTAINED_FROM_USER"  // Ottieni il codice di autorizzazione
lSuccess := oGmail:GetAccessToken( cCode )
IF lSuccess
   MsgInfo( "Token di accesso ottenuto!", "Successo" )
ELSE
   MsgError( "Errore durante l'ottenimento del token.", "Errore" )
ENDIF

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LOCAL lSuccess
lSuccess := oGmail:SendEmail( "Test Email", "Ciao, questa è una prova di invio email!", "recipient@example.com" )
IF lSuccess
   MsgInfo( "Email inviata con successo!", "Successo" )
ELSE
   MsgError( "Errore durante l'invio dell'email.", "Errore" )
ENDIF

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FUNCTION HttpPostRequest( cUrl, cData, cHeaders )
   LOCAL cResponse
   cResponse := HttpPost( cUrl, cData, cHeaders )
   RETURN cResponse

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FUNCTION Base64Encode( cData )
   RETURN HB_BASE64ENCODE( cData )

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CLASS Toffice365

   DATA cClientId // OAuth2 Client ID
   DATA cClientSecret // OAuth2 Client Secret
   DATA cRedirectUri // Redirect URI
   DATA cAccessToken // OAuth2 Access Token
   DATA cRefreshToken // OAuth2 Refresh Token
   DATA cAuthUrl // Authorization URL

   METHOD Init( cClientId, cClientSecret, cRedirectUri )
   METHOD GetAuthorizationUrl()
   METHOD GetAccessToken( cCode )
   METHOD SendEmail( cSubject, cBody, cRecipient )

ENDCLASS

// Constructor for Toffice365 class
METHOD Init( cClientId, cClientSecret, cRedirectUri )
   ::cClientId := cClientId
   ::cClientSecret := cClientSecret
   ::cRedirectUri := cRedirectUri
   ::cAuthUrl := "https://login.microsoftonline.com/common/oauth2/v2.0/authorize?" + ;
                    "client_id=" + SELF:cClientId + ;
                    "&response_type=code" + ;
                    "&redirect_uri=" + SELF:cRedirectUri + ;
                    "&scope=Mail.Send"
   RETURN NIL

// Method to get the authorization URL
METHOD GetAuthorizationUrl()
   RETURN ::cAuthUrl

// Method to get access token using authorization code
METHOD GetAccessToken( cCode )
   LOCAL cUrl, cData, cResponse, cTokenUrl
   LOCAL aJson
   cTokenUrl := "https://login.microsoftonline.com/common/oauth2/v2.0/token"
   cData := "code=" + cCode + ;
            "&client_id=" + SELF:cClientId + ;
            "&client_secret=" + SELF:cClientSecret + ;
            "&redirect_uri=" + SELF:cRedirectUri + ;
            "&grant_type=authorization_code"

   // Request to get the token
   cResponse := HttpPostRequest( cTokenUrl, cData, "" )
   IF !Empty(cResponse)
      
      aJson := JsonParse( cResponse )
      ::cAccessToken := aJson[ "access_token" ]
      ::cRefreshToken := aJson[ "refresh_token" ]
      RETURN .T.
   ELSE
      RETURN .F.
   ENDIF

// Method to send an email via Office 365 (Microsoft Graph)
METHOD SendEmail( cSubject, cBody, cRecipient )
   LOCAL cUrl, cMessage, cRaw, cResponse

   // Prepara il messaggio in formato MIME
   cRaw := '{"message": {' + ;
           '"subject": "' + cSubject + '",' + ;
           '"body": {"contentType": "Text", "content": "' + cBody + '"},' + ;
           '"toRecipients": [{"emailAddress": {"address": "' + cRecipient + '"}}]' + ;
           '}}'

   // URL to send message via Microsoft Graph
   cUrl := "https://graph.microsoft.com/v1.0/me/sendMail"

   // Send HTTP request with access token
   cResponse := HttpPostRequest( cUrl, cRaw, "Authorization: Bearer " + SELF:cAccessToken )
   IF !Empty(cResponse)
      RETURN .T.
   ELSE
      RETURN .F.
   ENDIF

RETURN NIL

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LOCAL oOffice365
oOffice365 := Toffice365():New()

// Initializes with the client_id, client_secret and redirect_uri obtained from Azure Portal
oOffice365:Init( "YOUR_CLIENT_ID", "YOUR_CLIENT_SECRET", "YOUR_REDIRECT_URI" )

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LOCAL cAuthUrl
cAuthUrl := oOffice365:GetAuthorizationUrl()
MsgInfo( "Visita questo URL per autorizzare l'app: " + cAuthUrl, "Autorizzazione OAuth2" )

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LOCAL cCode, lSuccess
cCode := "AUTHORIZATION_CODE_OBTAINED_FROM_USER"  // Codice di autorizzazione
lSuccess := oOffice365:GetAccessToken( cCode )
IF lSuccess
   MsgInfo( "Token di accesso ottenuto!", "Successo" )
ELSE
   MsgError( "Errore durante l'ottenimento del token.", "Errore" )
ENDIF

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LOCAL lSuccess
lSuccess := oOffice365:SendEmail( "Test Email", "Ciao, questa è una prova di invio email!", "recipient@example.com" )
IF lSuccess
   MsgInfo( "Email inviata con successo!", "Successo" )
ELSE
   MsgError( "Errore durante l'invio dell'email.", "Errore" )
ENDIF