[stable28] Show error when trying to open a shared PDF without download permissions #1096
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"canDownload" inverted the value of the "hideDownload" setting. However, that was not accurate, as if the download is hidden the file can still be downloaded. Moreover, it is possible to actually disallow downloads, which is a different setting (using share attributes) than hiding it. Therefore, to better differentiate between a hidden download and a disabled download the previous "canDownload" was renamed (and adjusted as needed) to "hideDownload". Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
In order to show a PDF file it needs to be downloaded. Therefore, if a shared PDF file does not have download permissions it is not possible to show it, so now an error is shown instead. The error is a custom one rather than a standard error from the viewer (although with the same appearance) to better explain the reason. Note that the error is shown only when the PDF file is loaded through the viewer, which should be always the case. There is a fallback to inject the UI in public shares in case the viewer is not available, but handling the error also in that case was not trivial and that fallback should never be used anyway, so it was not taken into account. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
Signed-off-by: nextcloud-command <nextcloud-command@users.noreply.github.com>
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Backport of #1077
Warning, This backport's changes differ from the original and might be incomplete⚠️
Todo
Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.