Open files via public link in associated App (Collabora, OnlyOffice, Word etc.)

[tbsbdr]

Needed for Cern Stage 1 in Sept 2021

Userstory

As a user who receives a public link I want to have the option to open the file inside a "browser app" so that I don't have the need to install a local app to open the file.

Acceptance Criteria

• show shared file(s) in files list
• click on file executes standard action
• context menu (via rightclick or 3-dots) offers alternative open-with ... apps
• download is in the quickactions permanently visible as call-to-action

Context

In order to deliver the feature for cern until the end of September 2021, we need to focus on a solution that meets the minimum requirements. A more sophisticated solution (but not feasible in September) could be to open files directly in the associated app and provide "download" and "open with ..." from here. But such a solution would require a Full-screen view (see #5786).

Examples

Example oc10:

check it out: https://cloud.owncloud.com/index.php/s/VtY8JeMjKjtxj8F

Example Google Drive

check it out: https://docs.google.com/document/d/1WrkFjgioofvYe2uLsVdCW6zRvBb6qPp7/edit?usp=sharing&ouid=112080943748993282565&rtpof=true&sd=true

Example One Drive

check it out: https://1drv.ms/w/s!AmFv-ruebwpFkBX6BvqNLz3zRxAA?e=ky6BHQ

view mode:

edit mode:

Example Dropbox

check it out: https://www.dropbox.com/scl/fi/bco1nmvm9i8cp0ptujo77/Document.docx?dl=0&rlkey=pjwoqlyqdmxji4skh0tzoyrkk

Example Box.com

check it out: https://app.box.com/s/w0s97nf92wjrmj78oedlda73007c3tya

[tbsbdr]

@labkode could you please check the acceptance criteria ^ to meet your "stage 1" requirements?

[exalate-issue-sync]

Tobias Baader commented: we need to wait until the app provider PR (#5712) is merged, then estimate this story.

[exalate-issue-sync]

Benedikt Kulmann commented: Dumping notes about the app provider here, due to lack of a good place for it:
concept: open editors in an iframe with only one web-extension (not one per editor like we had it before)
in context of web: app provider has 2 http endpoints
/app/list - gives you a list of mime types + app names
/open - throw fileId at it and specify an application (or leave empty). response is a URL + meta info if GET or form-POST is necessary for the iframe.

[labkode]

@tbsbdr as of today OCIS does not offer the single view as we're used in OC10. OCIS currently shows a file listing independently if it was a public link targeting a folder or a file (attached screenshot).

(public link to a file)

If I understood correctly what you propose is the same behaviour as will have when under "Your files".
To me is acceptable.

@diocas @elizavetaRa please comment.

[tbsbdr]

If I understood correctly what you propose is the same behaviour as will have when under "Your files".

Yep, correct

[wkloucek]

@tbsbdr @micbar this is not possible without backend changes, I created a ticket for oCIS here: owncloud/ocis#2479