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<?php
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/**
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* @file
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* Install, update and uninstall functions for the Field Permissions module.
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*/
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/**
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* Implements hook_install().
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*/
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function field_permissions_install() {
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// Set a larger weight for the module.
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db_update('system')
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->fields(array('weight' => 50))
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->condition('name', 'field_permissions')
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->execute();
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}
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/**
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* Implements hook_uninstall().
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*/
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function field_permissions_uninstall() {
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// Collect all the field data that reference "field_permissions", within
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// the field_config table.
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//
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$records = db_query("SELECT * FROM {field_config} WHERE data LIKE '%field_permissions%'");
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foreach ($records as $record) {
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$data = $record->data;
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$data = unserialize($data);
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unset($data['field_permissions']);
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$data = serialize($data);
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// Update the record.
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db_query("UPDATE {field_config} SET data = :data WHERE id = :id",
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array(':data' => $data, ':id' => $record->id));
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}
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}
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/**
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* Sets a larger weight for the module so that the Field Permissions become available.
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*/
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function field_permissions_update_7000(&$sandbox) {
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db_update('system')
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->fields(array('weight' => 50))
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->condition('name', 'field_permissions')
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->execute();
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}
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/**
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* Migrate field permission settings to the new system (public/private/custom).
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*/
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function field_permissions_update_7001() {
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foreach (field_info_fields() as $field_name => $field) {
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// If the field has any field permissions enabled, it will be using custom
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// permissions under the new system and needs to be converted. Otherwise,
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// it is a public field (the default) and can be ignored.
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if (!empty($field['settings']['field_permissions']) && array_filter($field['settings']['field_permissions'])) {
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// Set the type to FIELD_PERMISSIONS_CUSTOM. (The module may be disabled
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// when this update function runs, so we need to use the numeric value
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// rather than relying on the constant being defined.)
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$field['field_permissions']['type'] = 2;
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$field_permissions = $field['settings']['field_permissions'];
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$permissions_by_operation = array(
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// View-related permissions.
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array(
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'view' => "view $field_name",
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'view own' => "view own $field_name",
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),
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// Edit-related permissions.
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array(
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'create' => "create $field_name",
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'edit' => "edit $field_name",
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'edit own' => "edit own $field_name",
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),
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);
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// Loop through each type of operation (view or edit).
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foreach ($permissions_by_operation as $permissions) {
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$actions = array_keys($permissions);
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// If none of the related permissions were enabled, all users were
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// allowed to perform the relevant actions on this field, so we need to
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// assign permissions here to preserve that behavior.
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$has_enabled_permissions = (bool) array_filter(array_intersect_key($field_permissions, array_flip($actions)));
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if (!$has_enabled_permissions) {
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_update_7000_user_role_grant_permissions(DRUPAL_ANONYMOUS_RID, $permissions, 'field_permissions');
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_update_7000_user_role_grant_permissions(DRUPAL_AUTHENTICATED_RID, $permissions, 'field_permissions');
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}
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// Otherwise, for each permission that was disabled, no users should be
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// allowed to perform that action; therefore, make sure to unassign any
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// (stale) permissions that they may have.
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else {
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foreach ($actions as $action) {
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if (empty($field_permissions[$action])) {
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if ($action != 'create') {
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$permission = $permissions[$action];
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$rids = array_keys(user_roles(FALSE, $permission));
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foreach ($rids as $rid) {
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user_role_revoke_permissions($rid, array($permission));
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}
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}
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// The 'create' action needs special handling, since previously,
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// if create permissions were not enabled the code would have
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// fallen back on checking edit permissions. Now, though, create
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// permissions are always enabled (and always checked when an
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// entity is being created). Therefore, we need to figure out
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// what the fallback would have been and assign new create
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// permissions based on that.
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else {
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$rids_with_create_access = array();
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// The first fallback is edit permissions; if those are
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// enabled, any role with edit permission would have been
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// granted access.
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if (!empty($field_permissions['edit'])) {
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$rids_with_create_access = array_keys(user_roles(FALSE, $permissions['edit']));
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}
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// The final fallback is 'edit own' permissions; if those are
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// enabled, any role with 'edit own' permission would have been
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// granted access. (It is additionally required that the entity
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// being checked is owned by the current user, but in the case
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// of nodes being created that will always be the case anyway,
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// and nodes are the only entities we need to support for the
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// D6-to-D7 upgrade.)
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if (!empty($field_permissions['edit own'])) {
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$rids_with_create_access = array_unique(array_merge($rids_with_create_access, array_keys(user_roles(FALSE, $permissions['edit own']))));
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}
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// Assign create permissions to all the relevant roles.
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foreach ($rids_with_create_access as $rid) {
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_update_7000_user_role_grant_permissions($rid, array($permissions['create']), 'field_permissions');
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}
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}
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}
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}
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}
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}
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}
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// Remove the old field permissions settings if necessary, and save the
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// field.
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if (isset($field['settings']['field_permissions'])) {
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// We can't unset this or field_update_field() will automatically add it
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// back (using the prior field data), so do the next best thing.
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$field['settings']['field_permissions'] = NULL;
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field_update_field($field);
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}
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}
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}
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