fix: Avoid failing on fopen for NonExistingFiles

[juliusknorr]

An easy way to trigger this is to enable watermarking but no condition and then create a new file from a template.

This only happens when calling the node API with newFile and some content. A way to reproduce this locally is to create a new markdown file from a template in the template directory.

Based on this exception trace that was catched:

{
 "reqId": "XXXXX",
 "level": 3,
 "user": "--",
 "app": "no app in context",
 "method": "POST",
 "url": "/ocs/v2.php/apps/spreed/api/v1/recording/1234567/store",
 "message": "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm",
 "userAgent": "Nextcloud-Talk-Recording/0.1",
 "version": "31.0.5.1",
 "exception": {
   "Exception": "OCP\\Files\\NotFoundException",
   "Message": "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm",
   "Code": 0,
   "Trace": [
     {
       "file": "/var/www/nextcloud/lib/private/Files/Node/Folder.php",
       "line": 107,
       "function": "get",
       "class": "OC\\Files\\Node\\Root",
       "type": "->",
       "args": [
         "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm"
       ]
     },
     {
       "file": "/var/www/nextcloud/custom_apps/richdocuments/lib/Storage/SecureViewWrapper.php",
       "line": 96,
       "function": "get",
       "class": "OC\\Files\\Node\\Folder",
       "type": "->",
       "args": [
         "files/Talk/Recording/1234567/Recording XXXXXX.webm"
       ]
     },
     {
       "file": "/var/www/nextcloud/custom_apps/richdocuments/lib/Storage/SecureViewWrapper.php",
       "line": 81,
       "function": "shouldSecure",
       "class": "OCA\\Richdocuments\\Storage\\SecureViewWrapper",
       "type": "->",
       "args": [
         "files/Talk/Recording/1234567/Recording XXXXXX.webm"
       ]
     },
     {
       "file": "/var/www/nextcloud/custom_apps/richdocuments/lib/Storage/SecureViewWrapper.php",
       "line": 42,
       "function": "checkFileAccess",
       "class": "OCA\\Richdocuments\\Storage\\SecureViewWrapper",
       "type": "->",
       "args": [
         "files/Talk/Recording/1234567/Recording XXXXXX.webm"
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/Files/View.php",
       "line": 629,
       "function": "fopen",
       "class": "OCA\\Richdocuments\\Storage\\SecureViewWrapper",
       "type": "->",
       "args": [
         "files/Talk/Recording/1234567/Recording XXXXXX.webm",
         "w"
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/Files/Node/Folder.php",
       "line": 156,
       "function": "file_put_contents",
       "class": "OC\\Files\\View",
       "type": "->",
       "args": [
         "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm",
         null
       ]
     },
     {
       "file": "/var/www/nextcloud/custom_apps/spreed/lib/Service/RecordingService.php",
       "line": 142,
       "function": "newFile",
       "class": "OC\\Files\\Node\\Folder",
       "type": "->",
       "args": [
         "Recording XXXXXX.webm",
         null
       ]
     },
     {
       "file": "/var/www/nextcloud/custom_apps/spreed/lib/Controller/RecordingController.php",
       "line": 409,
       "function": "store",
       "class": "OCA\\Talk\\Service\\RecordingService",
       "type": "->",
       "args": [
         {
           "__class__": "OCA\\Talk\\Room"
         },
         "admin",
         {
           "name": "Recording XXXXXX.webm",
           "full_path": "Recording XXXXXX.webm",
           "type": "",
           "tmp_name": "/upload_tmp/phpB8VqhN",
           "error": 0,
           "0": "And 1 more entries, set log level to debug to see all entries"
         }
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php",
       "line": 200,
       "function": "store",
       "class": "OCA\\Talk\\Controller\\RecordingController",
       "type": "->",
       "args": [
         "admin"
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/AppFramework/Http/Dispatcher.php",
       "line": 114,
       "function": "executeController",
       "class": "OC\\AppFramework\\Http\\Dispatcher",
       "type": "->",
       "args": [
         {
           "__class__": "OCA\\Talk\\Controller\\RecordingController"
         },
         "store"
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/AppFramework/App.php",
       "line": 161,
       "function": "dispatch",
       "class": "OC\\AppFramework\\Http\\Dispatcher",
       "type": "->",
       "args": [
         {
           "__class__": "OCA\\Talk\\Controller\\RecordingController"
         },
         "store"
       ]
     },
     {
       "file": "/var/www/nextcloud/lib/private/Route/Router.php",
       "line": 307,
       "function": "main",
       "class": "OC\\AppFramework\\App",
       "type": "::",
       "args": [
         "OCA\\Talk\\Controller\\RecordingController",
         "store",
         {
           "__class__": "OC\\AppFramework\\DependencyInjection\\DIContainer"
         },
         {
           "apiVersion": "v1",
           "token": "1234567",
           "_route": "ocs.spreed.recording.store"
         }
       ]
     },
     {
       "file": "/var/www/nextcloud/ocs/v1.php",
       "line": 49,
       "function": "match",
       "class": "OC\\Route\\Router",
       "type": "->",
       "args": [
         "/ocsapp/apps/spreed/api/v1/recording/1234567/store"
       ]
     },
     {
       "file": "/var/www/nextcloud/ocs/v2.php",
       "line": 7,
       "args": [
         "/var/www/nextcloud/ocs/v1.php"
       ],
       "function": "require_once"
     }
   ],
   "File": "/var/www/nextcloud/lib/private/Files/Node/Root.php",
   "Line": 182,
   "message": "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm",
   "exception": {},
   "CustomMessage": "/admin/files/Talk/Recording/1234567/Recording XXXXXX.webm"
 }
}

[juliusknorr]

/backport to stable31