How to Interact with Google Calendar?

https://zapier.com/help/doc/common-problems-with-google-calendar#are-you-creating-an-all-day-event

Hello

When you launched your script for the first time, it must have given you a code to write in the console..

If you did it locally, you need to delete the token and regenerate it from your website.

Warning.. using this API from a shared server is not guaranteed... Sometimes, the server's IP is blacklisted by Google... And it's complicated to get it unblocked.

.
Sincerely,
Jordane

Thank you Jordan for this warning... Are you advising me to give up?

Actually, I would like "simply" for my rental contract registration form to add an entry to Google Calendar with the start and end dates...

When I ran the command php quickstart.php from my terminal, I got a link that I pasted into Chrome, which then asked me to select a Google account. I chose the one for which I needed access to the calendar.
And that’s where I got the info: The developer hasn’t given you access to this app. It’s currently being tested and it hasn’t been verified by Google.
I modified the URI of my API to http://127.0.0.1/monsite/api/quickstart.php, but I have the same error!

I don't know how to delete the token you mentioned because I don't know where it is!
I can't generate any command line from my website because I have no SSH access, and if I run the quickstart.php file from my browser I get the error message:
Fatal error: Uncaught Exception: This application must be run on the command line

After watching 2 or 3 YouTube tutorials (not much found on the subject) in very heavy Indian-accented English, I still managed to make progress on my project to interact with Google Calendar. I created the proper access to my account in my console.cloud.google.com, this time with functional permissions.

I can now write in my calendar via this test page https://developers.google.com/calendar/api/v3/reference/events/insert?hl=fr&apix=true#try-it...

The problem is that those tutorials are not clear about the procedure for writing from my web pages in PHP to my calendar...

I have this piece of code:

<?php $event = new Google_Service_Calendar_Event(array( 'summary' => 'TEST', 'location' => '800 Howard St., San Francisco, CA 94103', 'description' => 'A chance to hear more about Google\'s developer products.', 'start' => array( 'date' => '2022-01-01', 'timeZone' => 'America/Los_Angeles', ), 'end' => array( 'date' => '2022-01-05', 'timeZone' => 'America/Los_Angeles', ), 'recurrence' => array( 'RRULE:FREQ=DAILY;COUNT=2' ), 'attendees' => array(), 'reminders' => array( 'useDefault' => FALSE, 'overrides' => array( array('method' => 'email', 'minutes' => 24 * 60), array('method' => 'popup', 'minutes' => 10), ), ), )); $calendarId = 'monagenda.rhnorhnerhencpacnn.calendar.google.com'; $event = $service->events->insert($calendarId, $event); printf('Event created: %s\n', $event->htmlLink); ?>

Which gives me this error:
Fatal error: Uncaught Error: Class 'Google_Service_Calendar_Event' not found in /var/www/html/gite/gestion/api/event.php

Could you please advise me?

Finally, the quickstart.php file from Google gives rather good results (no errors in any case), but I still don't see how to write in my calendar:

<?php require __DIR__ . '/vendor/autoload.php'; /*if (php_sapi_name() != 'cli') { throw new Exception('This application must be run on the command line.'); }*/ use Google\Client; use Google\Service\Calendar; /** * Returns an authorized API client. * @return Client the authorized client object */ function getClient() { $client = new Client(); $client->setApplicationName('Google Calendar API PHP Quickstart'); $client->setScopes(Google_Service_Calendar::CALENDAR); //<= ACCORDING TO DOC developers.google.com $client->setAuthConfig('credentials.json'); $client->setAccessType('offline'); $client->setPrompt('select_account consent'); // Load previously authorized token from a file, if it exists. // The file token.json stores the user's access and refresh tokens, and is // created automatically when the authorization flow completes for the first // time. $tokenPath = 'token.json'; if (file_exists($tokenPath)) { $accessToken = json_decode(file_get_contents($tokenPath), true); $client->setAccessToken($accessToken); } // If there is no previous token or it's expired. if ($client->isAccessTokenExpired()) { // Refresh the token if possible, else fetch a new one. if ($client->getRefreshToken()) { $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken()); } else { // Request authorization from the user. $authUrl = $client->createAuthUrl(); printf("Open the following link in your browser:\n%s\n", $authUrl); print 'Enter verification code: '; $authCode = trim(fgets(STDIN)); // Exchange authorization code for an access token. $accessToken = $client->fetchAccessTokenWithAuthCode($authCode); $client->setAccessToken($accessToken); // Check to see if there was an error. if (array_key_exists('error', $accessToken)) { throw new Exception(join(', ', $accessToken)); } } // Save the token to a file. if (!file_exists(dirname($tokenPath))) { mkdir(dirname($tokenPath), 0700, true); } file_put_contents($tokenPath, json_encode($client->getAccessToken())); } return $client; } // Get the API client and construct the service object. $client = getClient(); $service = new Calendar($client); // Print the next 10 events on the user's calendar. try{ $calendarId = 'xxxxxxxxxxxxxxxxxxx@group.calendar.google.com'; $optParams = array( 'maxResults' => 10, 'orderBy' => 'startTime', 'singleEvents' => true, 'timeMin' => date('c'), ); $results = $service->events->listEvents($calendarId, $optParams); $events = $results->getItems(); if (empty($events)) { print "No upcoming events found.\n"; } else { print "Upcoming events:\n"; foreach ($events as $event) { $start = $event->start->dateTime; if (empty($start)) { $start = $event->start->date; } printf("%s (%s)\n", $event->getSummary(), $start); } } } catch(Exception $e) { // TODO(developer) - handle error appropriately echo 'Message: ' .$e->getMessage(); } ?>

RESULT: 

No upcoming events found.

1. Deleting the initial project
2. Creating a new project "Agenda Management" on console.cloud.google.com
3. Activating the Google Calendar API library
4. Creating an External User Type for OAuth 2.0
5. Creating a Service Account Identifier
6. Adding a JSON type key to this service account (saved as credentials.json at the same level as quickstart.php)
7. Modifying quickstart.php to add an event:

<?php require __DIR__ . '/vendor/autoload.php'; /* if (php_sapi_name() != 'cli') { throw new Exception('This application must be run on the command line.'); } */ use Google\Client; use Google\Service\Calendar; /** * Returns an authorized API client. * @return Client the authorized client object */ function getClient() { $client = new Client(); $client->setApplicationName('Google Calendar API PHP Quickstart'); $client->setScopes('https://www.googleapis.com/auth/calendar');//.events.readonly'); $client->setAuthConfig('credentials.json'); $client->setAccessType('offline'); $client->setPrompt('select_account consent'); // Load previously authorized token from a file, if it exists. // The file token.json stores the user's access and refresh tokens, and is // created automatically when the authorization flow completes for the first // time. $tokenPath = 'token.json'; if (file_exists($tokenPath)) { $accessToken = json_decode(file_get_contents($tokenPath), true); $client->setAccessToken($accessToken); } // If there is no previous token or it's expired. if ($client->isAccessTokenExpired()) { // Refresh the token if possible, else fetch a new one. if ($client->getRefreshToken()) { $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken()); } else { // Request authorization from the user. $authUrl = $client->createAuthUrl(); printf("Open the following link in your browser:\n%s\n", $authUrl); print 'Enter verification code: '; $authCode = trim(fgets(STDIN)); // Exchange authorization code for an access token. $accessToken = $client->fetchAccessTokenWithAuthCode($authCode); $client->setAccessToken($accessToken); // Check to see if there was an error. if (array_key_exists('error', $accessToken)) { throw new Exception(join(', ', $accessToken)); } } // Save the token to a file. if (!file_exists(dirname($tokenPath))) { mkdir(dirname($tokenPath), 0700, true); } file_put_contents($tokenPath, json_encode($client->getAccessToken())); } return $client; } // Get the API client and construct the service object. $client = getClient(); $service = new Calendar($client); // Print the next 10 events on the user's calendar. /*try{ $calendarId = 'primary'; $optParams = array( 'maxResults' => 10, 'orderBy' => 'startTime', 'singleEvents' => true, 'timeMin' => date('c'), ); $results = $service->events->listEvents($calendarId, $optParams); $events = $results->getItems(); if (empty($events)) { print "No upcoming events found.\n"; } else { print "Upcoming events:\n"; foreach ($events as $event) { $start = $event->start->dateTime; if (empty($start)) { $start = $event->start->date; } printf("%s (%s)\n", $event->getSummary(), $start); } } } catch(Exception $e) { // TODO(developer) - handle error appropriately echo 'Message: ' .$e->getMessage(); }*/ // ADD TO AGENDA: try{ $event = new Google_Service_Calendar_Event(array( 'summary' => 'TEST ADDITION', 'location' => '800 Howard St., San Francisco, CA 94103', 'description' => 'A chance to hear more about Google\'s developer products.', 'start' => array( 'date' => '2023-01-01', 'timeZone' => 'America/Los_Angeles', ), 'end' => array( 'date' => '2023-01-04', 'timeZone' => 'America/Los_Angeles', ), 'recurrence' => array( 'RRULE:FREQ=DAILY;COUNT=2' ), 'attendees' => array(), 'reminders' => array( 'useDefault' => FALSE, 'overrides' => array( array('method' => 'email', 'minutes' => 24 * 60), array('method' => 'popup', 'minutes' => 10), ), ), )); $calendarId = 'primary'; $event = $service->events->insert($calendarId, $event); printf('Event created: %s\n', $event->htmlLink); } catch(Exception $e) { // TODO(developer) - handle error appropriately echo 'Message: ' .$e->getMessage(); } ?>

MESSAGE DISPLAYED WHEN EXECUTING QUICKSTART.PHP:
Event created: https://www.google.com/calendar/event?eid=RRRWNwdm5vYjBpcnRRRRRRcjFqb2dfMjAyMjARRRRRdGlvbi1hZ2VuZGRRRRR2VuZGEtMzU3NDA5LmlhbS5RRRRVydmljZWFjRRRRRbnQuY29t%5Cn

Better but still nothing in the calendar!

The same quickstart.php code for reading the calendar, that is uncommenting the part // Print the next 10 events on the user's calendar. gives me:
Upcoming events: TEST ADDITION (2023-01-01) TEST ADDITION (2023-01-02)

The Google account uses several calendars, each employee has their own (5) + the one I created MANAGEMENT.

They are all checked as "visible".

All attempts to replace $calendarId with anything other than 'primary' result in message #10.

Just a heads up, I'm running my tests from my laptop and I think I read that it should be in https...
So, I transferred my 17,000 files (?!?!?) from Google, Composer, Paragonie, ... to my Ionos server which is in https and now I have this error when inserting into the calendar:

Message: { "error": { "code": 403, "message": "Request had insufficient authentication scopes.", "errors": [ { "message": "Insufficient Permission", "domain": "global", "reason": "insufficientPermissions" } ], "status": "PERMISSION_DENIED", "details": [ { "@type": "type.googleapis.com/google.rpc.ErrorInfo", "reason": "ACCESS_TOKEN_SCOPE_INSUFFICIENT", "domain": "googleapis.com", "metadata": { "service": "calendar-json.googleapis.com", "method": "calendar.v3.Events.Insert" } } ] } }

I recreated a service account, generated a new key and I no longer have the 403 error!
I hadn't noticed (as it was very discreet) that the link after insertion displayed:
Unable to find the requested event

I also tried insertions without the Timezone America/Los_Angeles and the DateTime,
I have this in reading:
Upcoming events: ETIENNE (2023-01-01) ETIENNE (2023-01-01T16:00:00Z) ETIENNE (2023-01-02) ETIENNE (2023-01-02T16:00:00Z)

Big Big breakthrough:

When I created a service account in console.cloud.google.com, then for this account I created a key, I obtained a JSON file + an email address of the type nomdemonprojet@nomdemonprojet-785123.iam.gserviceaccount.com

1. I went to my Google Calendar, on the GESTION calendar created to receive events from my PHP code to add this email address in "share with specific people".

2. I retrieved the ID of this GESTION calendar to assign it to the variable $calendarId.

I relaunched my quickstart.php page and TAAAADAAAAA:

<?php require __DIR__ . '/vendor/autoload.php'; /* if (php_sapi_name() != 'cli') { throw new Exception('This application must be run on the command line.'); } */ use Google\Client; use Google\Service\Calendar; /** * Returns an authorized API client. * @return Client the authorized client object */ function getClient() { $client = new Client(); $client->setApplicationName('Google Calendar API PHP Quickstart'); $client->setScopes('https://www.googleapis.com/auth/calendar');//.events.readonly');<= MODIFY HERE $client->setAuthConfig('credentials.json');//<= The authentication file $client->setAccessType('offline'); $client->setPrompt('select_account consent'); // Load previously authorized token from a file, if it exists. // The file token.json stores the user's access and refresh tokens, and is // created automatically when the authorization flow completes for the first // time. $tokenPath = 'token.json'; if (file_exists($tokenPath)) { $accessToken = json_decode(file_get_contents($tokenPath), true); $client->setAccessToken($accessToken); } // If there is no previous token or it's expired. if ($client->isAccessTokenExpired()) { // Refresh the token if possible, else fetch a new one. if ($client->getRefreshToken()) { $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken()); } else { // Request authorization from the user. $authUrl = $client->createAuthUrl(); printf("Open the following link in your browser:\n%s\n", $authUrl); print 'Enter verification code: '; $authCode = trim(fgets(STDIN)); // Exchange authorization code for an access token. $accessToken = $client->fetchAccessTokenWithAuthCode($authCode); $client->setAccessToken($accessToken); // Check to see if there was an error. if (array_key_exists('error', $accessToken)) { throw new Exception(join(', ', $accessToken)); } } // Save the token to a file. if (!file_exists(dirname($tokenPath))) { mkdir(dirname($tokenPath), 0700, true); } file_put_contents($tokenPath, json_encode($client->getAccessToken())); } return $client; } // Get the API client and construct the service object. $client = getClient(); $service = new Calendar($client); // READ FROM CALENDAR /*try{ $calendarId = 'primary'; $optParams = array( 'maxResults' => 10, 'orderBy' => 'startTime', 'singleEvents' => true, 'timeMin' => date('c'), ); $results = $service->events->listEvents($calendarId, $optParams); $events = $results->getItems(); if (empty($events)) { print "No upcoming events found.\n"; } else { print "Upcoming events:\n"; foreach ($events as $event) { $start = $event->start->dateTime; if (empty($start)) { $start = $event->start->date; } printf("%s (%s)\n", $event->getSummary(), $start); } } } catch(Exception $e) { // TODO(developer) - handle error appropriately echo 'Message: ' .$e->getMessage(); }*/ // ADD TO CALENDAR: try{ $event = new Google_Service_Calendar_Event(array( 'summary' => 'VIVA', 'location' => '800 Howard St., San Francisco, CA 94103', 'description' => 'A chance to hear more about Google\'s developer products.', 'start' => array( 'date' => '2023-01-30', ), 'end' => array( 'date' => '2023-02-01', ), 'recurrence' => array(), 'attendees' => array(), 'reminders' => array(), )); $calendarId = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXX@group.calendar.google.com'; $event = $service->events->insert($calendarId, $event); printf('Event created: %s\n', $event->htmlLink); } catch(Exception $e) { // TODO(developer) - handle error appropriately echo 'Message: ' .$e->getMessage(); } ?>