# Classroom - Invitations
- [API documentation](#api-documentation)
- [Notes](#notes)
- [Definitions](#definitions)
- [Create classroom invitations](#create-classroom-invitations)
- [Accept classroom invitations](#accept-classroom-invitations)
- [Delete classroom invitations](#delete-classroom-invitations)
- [Display classroom invitations by user](#display-classroom-invitations-by-user)
- [Display classroom invitations by course](#display-classroom-invitations-by-course)

## API documentation
* https://developers.google.com/classroom/reference/rest/v1/invitations

## Notes

You must authorize an additional Service Account scope to use these commands.
Do this command; sustitute a valid email address for user@domain.com.
```
gam user user@domain.com check serviceaccount
```
You should see the following scope fail:
```
Scope: https://www.googleapis.com/auth/classroom.rosters           , Checked: FAIL (6/15)
```
Follow the directions to authorize the Service Account scopes.

The Classroom API does not support inviting users from outside your domain.

## Definitions
```
<DomainName> ::= <String>(.<String>)+
<EmailAddress> ::= <String>@<DomainName>
<UniqueID> ::= id:<String>
<ClassroomInvitationID> ::= <String>
<ClassroomInvitationIDList> ::= "<ClassroomInvitationID>(,<ClassroomInvitationID>)*"
<ClassroomInvitationIDEntity> ::= <ClassroomInvitationIDList> | <FileSelector> | <CSVFileSelector> | <CSVkmdSelector> | <CSVDataSelector>
<CourseAlias> ::= <String>
<CourseID> ::= <Number>|d:<CourseAlias>
<CourseIDList> ::= "<CourseID>(,<CourseID>)*"
<CourseEntity> ::= <CourseIDList> | <FileSelector> | <CSVFileSelector | <CSVkmdSelector>
<CourseState> ::= active|archived|provisioned|declined|suspended
<CourseStateList> ::= all|"<CourseState>(,<CourseState>)*"
```
## Create classroom invitations
Invite users to classes.
```
gam <UserTypeEntity> create classroominvitation courses <CourseEntity> [role owner|student|teacher]
        [adminaccess|asadmin] [csvformat] [todrive <ToDriveAttributes>*] [formatjson [quotechar <Character>]]
```
If `role` is not specified, `student` will be used.

By default, classroom invitations are issued by the owner of the course, the `adminaccess` option causes the invitations to be issued by the admin named in `oauth2.txt`.

### Example

Suppose you have a CSV file CourseStudent.csv  with two columns: Course,Student.
This command will invite all students to their courses serially by student.
```
gam redirect stdout ./Invites.out redirect stderr stdout csvkmd users CourseStudent.csv keyfield Student datafield Course create classroominvitation role student course csvdata Course
```
This command will invite all students to their courses in parallel
```
gam redirect stdout ./Invites.out multiprocess redirect stderr stdout multiprocess csv CourseStudent.csv gam user ~Student create classroominvitation role student course ~Course
```
## Accept classroom invitations
Accept classroom invitations for users. You can only invite a co-teacher to be an owner of a course.
```
gam <UserTypeEntity> accept classroominvitation (ids <ClassroomInvitationIDEntity>)|([courses <CourseEntity>] [role all|owner|student|teacher])
```
By default, all invitations for the specified users will be accepted.

Select specific invitations to accept:
* `ids <ClassroomInvitationIDEntity>` - Specify invitation IDs

Select courses and accept invitations for those courses.
* `courses <CourseEntity>` - Specify courses

By default, invitations for all roles will be accepted; you can limit the acceptances to invitations of a specific role.

## Delete classroom invitations
Delete classroom invitations for users.
```
gam <UserTypeEntity> delete classroominvitation (ids <ClassroomInvitationIDEntity>)|([courses <CourseEntity>] [role all|owner|student|teacher])
```
By default, all invitations for the specified users will be deleted.

Select specific invitations to delete:
* `ids <ClassroomInvitationIDEntity>` - Specify invitation IDs

Select courses and delete invitations for those courses.
* `courses <CourseEntity>` - Specify courses

By default, invitations for all roles will be deleted; you can limit the deletions to invitations of a specific role.

## Display classroom invitations by user
Display classroom invitations for users.
```
gam <UserTypeEntity> show classroominvitations [role all|owner|student|teacher]
        [formatjson]
gam <UserTypeEntity> print classroominvitations [todrive <ToDriveAttributes>*] [role all|owner|student|teacher]
        [formatjson [quotechar <Character>]]
```
By default, invitations for all roles will be displayed; you can limit the display to invitations of a specific role.

## Display classroom invitations by course
```
gam show classroominvitations (course|class <CourseEntity>)*|([teacher <UserItem>] [student <UserItem>] [states <CourseStateList>])
        [role all|owner|student|teacher] [formatjson]
gam print classroominvitations [todrive <ToDriveAttributes>*] (course|class <CourseEntity>)*|([teacher <UserItem>] [student <UserItem>] [states <CourseStateList>])
        [role all|owner|student|teacher] [formatjson [quotechar <Character>]]
```
By default, classroom invitations for all courses are displayed.

To get classroom invitations for a specific set of courses, use the following option; it can be repeated to select multiple courses.
* `(course|class <CourseEntity>)*` - Display classroom invitations from the courses with the IDs specified in `<CourseEntity>`.

To get classroom invitations for courses based on their having a particular participant, use the following options. Both options can be specified.
* `teacher <UserItem>` - Display courses with the specified teacher.
* `student <UserItem>` - Display courses with the specified student.

To get classroom invitations for courses based on their state, use the following option. This option can be combined with the `teacher` and `student` options.
By default, all course states are selected.
* `states <CourseStateList>` - Display courses with any of the specified states.

By default, for `show`, Gam displays the information as an indented list of keys and values.
* `formatjson` - Display the fields in JSON format.

By default, for `print`, Gam displays the information as columns of fields; the following option causes the output to be in JSON format,
* `formatjson` - Display the fields in JSON format.

By default, when writing CSV files, Gam uses a quote character of double quote `"`. The quote character is used to enclose columns that contain
the quote character itself, the column delimiter (comma by default) and new-line characters. Any quote characters within the column are doubled.
When using the `formatjson` option, double quotes are used extensively in the data resulting in hard to read/process output.
The `quotechar <Character>` option allows you to choose an alternate quote character, single quote for instance, that makes for readable/processable output.
`quotechar` defaults to `gam.cfg/csv_output_quote_char`. When uploading CSV files to Google, double quote `"` should be used.
