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feat: Add confirmation email for form respondents
Implements issue #525 - Send confirmation emails to form respondents after submission. Features: - Add database migration for confirmation email settings (enabled, subject, body) - Add confirmation email fields to Form entity - Implement email sending with placeholder replacement: - {formTitle}, {formDescription}, {data} placeholders - Field name placeholders (e.g. {name}, {email}) - Automatic data overview if {data} not in template - Add UI in Settings sidebar to configure confirmation emails - Automatically detect email field from form submissions - Send email from form owner's email address Technical changes: - Add sendConfirmationEmail() method to FormsService - Integrate email sending into notifyNewSubmission() flow - Add unit tests for confirmation email functionality - Update FormsService constructor with IMailer and AnswerMapper dependencies - Update documentation (DataStructure.md, CHANGELOG.en.md) The feature requires at least one email-validated short text question in the form. Email sending failures are logged but don't break the submission process. Signed-off-by: Dmitry Tretyakov <dtretyakov@gmail.com>
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‎CHANGELOG.en.md‎

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# Changelog
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## Unreleased
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- **Confirmation emails for respondents**
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Form owners can enable an automatic confirmation email that is sent to the respondent after a successful submission.
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Requires an email-validated short text question in the form.
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Supported placeholders in subject/body:
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- `{formTitle}`, `{formDescription}`
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- `{<fieldName>}` (question `name` or text, sanitized)
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## v5.2.0 - 2025-09-25
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- **Time: restrictions and ranges**

‎docs/API_v3.md‎

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@@ -175,6 +175,9 @@ Returns the full-depth object of the requested form (without submissions).
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"state": 0,
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"lockedBy": null,
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"lockedUntil": null,
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"confirmationEmailEnabled": false,
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"confirmationEmailSubject": null,
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"confirmationEmailBody": null,
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"permissions": [
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"edit",
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"results",
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}
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```
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**Example with confirmation email enabled:**
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```
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"data": {
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"id": 4,
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"hash": "abc123def456ghi",
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"title": "Contact Form",
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"description": "Please fill out this contact form",
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"ownerId": "admin",
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"submissionMessage": "Thank you for your submission."
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"created": 1611240961,
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"access": {
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"permitAllUsers": false,
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"showToAllUsers": false
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},
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"expires": 0,
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"fileFormat": null,
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"fileId": null,
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"filePath": null,
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"isAnonymous": false,
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"submitMultiple": false,
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"allowEditSubmissions": false,
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"showExpiration": false,
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"canSubmit": true,
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"state": 0,
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"lockedBy": null,
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"lockedUntil": null,
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"confirmationEmailEnabled": true,
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"confirmationEmailSubject": "Thank you for submitting {formTitle}",
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"confirmationEmailBody": "Dear respondent,\n\nThank you for your submission to {formTitle}.\n\nYour submitted data:\n{data}\n\nBest regards",
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"permissions": [
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"edit",
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"results",
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"submit"
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],
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"questions": [
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{
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"id": 1,
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"formId": 4,
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"order": 1,
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"type": "short",
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"isRequired": true,
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"text": "Email address",
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"name": "email",
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"options": [],
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"accept": [],
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"extraSettings": {
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"validationType": "email"
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}
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}
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],
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"shares": [],
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"submissionCount": 0,
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"submissionMessage": "Thank you for your submission."
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}
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```
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### Clone a form
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Creates a clone of a form (without submissions).

‎docs/DataStructure.md‎

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| description | String | max. 8192 ch. | The Form description |
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| ownerId | String | | The nextcloud userId of the form owner |
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| submissionMessage | String | max. 2048 ch. | Optional custom message, with Markdown support, to be shown to users when the form is submitted (default is used if set to null) |
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| confirmationEmailEnabled | Boolean | | If enabled, send a confirmation email to the respondent after submission |
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| confirmationEmailSubject | String | max. 255 ch. | Optional confirmation email subject template (supports placeholders) |
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| confirmationEmailBody | String | | Optional confirmation email body template (plain text, supports placeholders) |
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| created | unix timestamp | | When the form has been created |
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| access | [Access-Object](#access-object) | | Describing access-settings of the form |
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| expires | unix-timestamp | | When the form should expire. Timestamp `0` indicates _never_ |
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"title": "Form 1",
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"description": "Description Text",
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"ownerId": "jonas",
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"confirmationEmailEnabled": false,
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"confirmationEmailSubject": null,
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"confirmationEmailBody": null,
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"created": 1611240961,
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"access": {},
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"expires": 0,

‎lib/Db/Form.php‎

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* @method void setLockedBy(string|null $value)
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* @method int getLockedUntil()
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* @method void setLockedUntil(int|null $value)
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* @method int getConfirmationEmailEnabled()
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* @method void setConfirmationEmailEnabled(bool $value)
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* @method string|null getConfirmationEmailSubject()
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* @method void setConfirmationEmailSubject(string|null $value)
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* @method string|null getConfirmationEmailBody()
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* @method void setConfirmationEmailBody(string|null $value)
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*/
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class Form extends Entity {
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protected $hash;
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protected $state;
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protected $lockedBy;
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protected $lockedUntil;
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protected $confirmationEmailEnabled;
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protected $confirmationEmailSubject;
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protected $confirmationEmailBody;
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/**
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* Form constructor.
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$this->addType('state', 'integer');
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$this->addType('lockedBy', 'string');
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$this->addType('lockedUntil', 'integer');
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$this->addType('confirmationEmailEnabled', 'boolean');
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}
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// JSON-Decoding of access-column.
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* state: 0|1|2,
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* lockedBy: ?string,
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* lockedUntil: ?int,
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* confirmationEmailEnabled: bool,
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* confirmationEmailSubject: ?string,
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* confirmationEmailBody: ?string,
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* }
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*/
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public function read() {
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'state' => $this->getState(),
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'lockedBy' => $this->getLockedBy(),
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'lockedUntil' => $this->getLockedUntil(),
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'confirmationEmailEnabled' => (bool)$this->getConfirmationEmailEnabled(),
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'confirmationEmailSubject' => $this->getConfirmationEmailSubject(),
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'confirmationEmailBody' => $this->getConfirmationEmailBody(),
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];
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}
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}

‎lib/Migration/Version050202Date20251217203121.php‎

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<?php
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declare(strict_types=1);
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/**
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* SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OCA\Forms\Migration;
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use Closure;
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use OCP\DB\ISchemaWrapper;
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use OCP\DB\Types;
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use OCP\Migration\IOutput;
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use OCP\Migration\SimpleMigrationStep;
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/**
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* Add confirmation email fields to forms
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*/
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class Version050202Date20251217203121 extends SimpleMigrationStep {
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/**
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* @param IOutput $output
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* @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
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* @param array $options
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* @return null|ISchemaWrapper
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*/
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public function changeSchema(IOutput $output, Closure $schemaClosure, array $options): ?ISchemaWrapper {
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/** @var ISchemaWrapper $schema */
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$schema = $schemaClosure();
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$table = $schema->getTable('forms_v2_forms');
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if (!$table->hasColumn('confirmation_email_enabled')) {
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$table->addColumn('confirmation_email_enabled', Types::BOOLEAN, [
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'notnull' => false,
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'default' => 0,
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]);
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}
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if (!$table->hasColumn('confirmation_email_subject')) {
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$table->addColumn('confirmation_email_subject', Types::STRING, [
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'notnull' => false,
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'default' => null,
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'length' => 255,
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]);
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}
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if (!$table->hasColumn('confirmation_email_body')) {
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$table->addColumn('confirmation_email_body', Types::TEXT, [
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'notnull' => false,
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'default' => null,
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]);
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}
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return $schema;
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}
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}

‎lib/ResponseDefinitions.php‎

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* shares: list<FormsShare>,
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* submissionCount?: int,
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* submissionMessage: ?string,
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* confirmationEmailEnabled: bool,
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* confirmationEmailSubject: ?string,
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* confirmationEmailBody: ?string,
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* }
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*
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* @psalm-type FormsUploadedFile = array{

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