208 lines
10 KiB
Markdown
208 lines
10 KiB
Markdown
I thought I'd draw attention to a desire of mine for **ikiwiki**. I'm no power-user, and mostly I do fairly simple stuff with my [wiki](http://kitenet.net/~kyle/family/wiki).
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However, I would like the ability (now) to **rename/move/delete** pages. As part of having a genealogy wiki, I've put name and dates of birth/death as part of the title of each article (so to avoid cases where people have the same name, but are children/cousins/etc of others with that name). However, some of this information changes. For instance, I didn't know a date of death and now I do, or I had it wrong originally, or it turns out someone is still alive I didn't know about. All of these cases leave me with bad article titles.
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So, I can go ahead and move the file to a new page with the correct info, orphan that page, provide a link for the new page if desired, and otherwise ignore that page. But then, it clutters up the wiki and serves no useful purpose.
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Anyway to consider implementing **rename/move/delete** ? I certainly lack the skills to appreciate what this would entail, but feel free to comment if it appears impossible, and then I'll go back to the aforementioned workaround. I would prefer simple rename, however.
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Thanks again to [Joey](http://kitenet.net/~joey) for putting ikiwiki together. I love the program.
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*[Kyle](http://kitenet.net/~kyle/)=*
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----
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The MediaWiki moving/renaming mechanism is pretty nice. It's easy to get a list of pages that point to the current page. When renaming a page it sticks a forwarding page in the original place. The larger the size of the wiki the more important organization tools become.
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I see the need for:
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* a new type of file to represent a forwarding page
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* a rename tool that can
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* move the existing page to the new name
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* optionally drop a forwarding page
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* optionally rewrite incoming links to the new location
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Brad
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> This could be implemented through the use of an HTTP redirect to the
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> new page, but this has the downside that people may not know they're being
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> redirected.
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>
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> This could also be implemented using a combination of raw inline and meta
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> to change the title (add a "redirected from etc." page. This could be done
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> with a plugin. A redirect page would be [[!redirect page="newpage"]].
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> But then if you click "edit" on this redirect page, you won't be able
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> to edit the new page, only the call to redirect.
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> --Ethan
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-----
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I'm going to try to run through a full analysis and design for moving and
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deleting pages here. I want to make sure all cases are covered. --[[Joey]]
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## UI
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The UI I envision is to add "Rename" and "Delete" buttons to the file edit
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page. Both next to the Save button, and also at the bottom of the attachment
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management interface.
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The attachment(s) to rename or delete would be selected using the check boxes
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and then the button applies to all of them. Deleting multiple attachments
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in one go is fine; renaming multiple attachments in one go is ambiguous,
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and it can just error out if more than one is selected for rename.
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(Alternatively, it could allow moving them all to a different subdirectory.)
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The Delete buttons lead to a page to confirm the deletion(s).
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The Rename buttons lead to a page with a text edit box for editing the
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page name. The title of the page is edited, not the actual filename.
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There will also be a optional comment field, so a commit message can be
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written for the rename/delete.
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Note that there's an edge case concerning pages that have a "/" encoded
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as part of their title. There's no way for a title edit box to
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differentiate between that, and a "/" that is instended to refer to a
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subdirectory to move the page to. Consequence is that "/" will always be
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treated literally, as a subdir separator; it will not be possible to use
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this interface to put an encoded "/" in a page's name.
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Once a page is renamed, ikiwiki will return to the page edit interface,
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now for the renamed page. Any modifications that the user had made to the
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textarea will be preserved.
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Similarly, when an attachment is renamed, or deleted, return to the page
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edit interface (with the attachments displayed).
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When a page is deleted, redirect the user to the toplevel index.
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Note that this design, particularly the return to the edit interface after
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rename, means that the rename button can *only* be put on the page edit ui.
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It won't be possible to put it on the action bar or somewhere else. (It
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would be possible to code up a different rename button that doesn't do
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that, and use it elsewhere.)
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Hmm, unless it saves the edit state and reloads it later, while using a separate
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form. Which seems to solve other problems, so I think is the way to go.
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## SubPages
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When renaming `foo`, it probably makes sense to also rename
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`foo/Discussion`. Should other SubPages in `foo/` also be renamed? I think
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it's probably simplest to rename all of its SubPages too.
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(For values of "simplest" that don't include the pain of dealing with all
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the changed links on subpages.. as well as issues like pagespecs that
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continue to match the old subpages, and cannot reasonably be auto-converted
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to use the new, etc, etc... So still undecided about this.)
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When deleting `foo`, I don't think SubPages should be deleted. The
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potential for mistakes and abuse is too large. Deleting Discussion page
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might be a useful exception.
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TODO: Currently, subpages are not addressed.
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## link fixups
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When renaming a page, it's desirable to keep links that point to it
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working. Rather than use redirection pages, I think that all pages that
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link to it should be modified to fix their links.
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The rename plugin can add a "rename" hook, which other plugins can use to
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update links &etc. The hook would be passed page content, the old and new
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link names, and would modify the content and return it. At least the link
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plugin should have such a hook.
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After calling the "rename" hook, and rendering the wiki, the rename plugin
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can check to see what links remain pointing to the old page. There could
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still be some, for example, CamelCase links probably won't be changed; img
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plugins and others contain logical links to the file, etc. The user can be
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presented with a list of all the pages that still have links to the old
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page, and can manually deal with them.
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In some cases, a redirection page will be wanted, to keep long-lived urls
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working. Since the meta plugin supports creating such pages, and since they
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won't always be needed, I think it will be simplest to just leave it up to
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the user to create such a redirection page after renaming a page.
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## who can delete/rename what?
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The source page must be editable by the user to be deleted/renamed.
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When renaming, the dest page must not already exist, and must be creatable
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by the user, too.
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lWhen deleting/renaming attachments, the `allowed_attachments` PageSpec
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is checked too.
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## RCS
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Three new functions are added to the RCS interface:
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* `rcs_remove(file)`
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* `rcs_rename(old, new)`
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* `rcs_commit_staged(message, user, ip)`
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See [[rcs_updates_needed_for_rename_and_remove]].
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## conflicts
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Cases to consider:
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* Alice clicks "delete" button for a page; Bob makes a modification;
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Alice confirms deletion. Ideally in this case, Alice should get an error
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message that there's a conflict.
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Update: In my current code, alice's deletion will fail if the file was
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moved or deleted in the meantime; if the file was modified since alice
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clicked on the delete button, the modifications will be deleted too. I
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think this is acceptable.
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* Alice opens edit UI for a page; Bob makes a modification; Alice
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clicks delete button and confirms deletion. Again here, Alice should get
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a conflict error. Note that this means that the rcstoken should be
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recorded when the edit UI is first opened, not when the delete button is
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hit.
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Update: Again here, there's no conflict, but the delete succeeds. Again,
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basically acceptible.
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* Alice and Bob both try to delete a page at the same time. It's fine for
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the second one to get a message that it no longer exists. Or just to
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silently fail to delete the deleted page..
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Update: It will display an error to the second one that the page doesn't
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exist.
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* Alice deletes a page; Bob had edit window open for it, and saves
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it afterwards. I think that Bob should win in this case; Alice can always
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notice the page has been added back, and delete it again.
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Update: Bob wins.
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* Alice clicks "rename" button for a page; Bob makes a modification;
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Alice confirms rename. This case seems easy, it should just rename the
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modified page.
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Update: it does
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* Alice opens edit UI for a page; Bob makes a modification; Alice
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clicks rename button and confirms rename. Seems same as previous case.
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Update: check
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* Alice and Bob both try to rename a page at the same time (to probably
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different names). Or one tries to delete, and the other to rename.
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I think it's acceptible for the second one to get an error message that
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the page no longer exists.
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Update: check, that happens
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* Alice renames a page; Bob had edit window open for it, and saves
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it afterwards, under old name. I think it's acceptible for Bob to succeed
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in saving it under the old name in this case, though not ideal.
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Update: Behavior is the same as if Alice renamed the page and Bob created
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a new page with the old name. Seems acceptable, though could be mildly
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confusing to Bob (or Alice).
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* Alice starts creating a new page. In the meantime, Bob renames a
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different page to that name. Alice should get an error message when
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committing; and it should have conflict markers. Ie, this should work the
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same as if Bob had edited the new page at the same time as Alice did.
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Update: That should happen. Haven't tested this case yet to make sure.
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* Bob starts renaming a page. In the meantime, Alice creates a new page
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with the name he's renaming it to. Here Bob should get a error message
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that he can't rename the page to an existing name. (A conflict resolution
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edit would also be ok.)
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Update: Bob gets an error message.
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* Alice renames (or deletes) a page. In the meantime, Bob is uploading an
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attachment to it, and finishes after the rename finishes. Is it
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acceptible for the attachment to be saved under the old name?
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Update: Meh. It's certianly not ideal; if Bob tries to save the page he
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uploaded the attachment to, he'll get a message about it having been
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deleted/renamed, and he can try to figure out what to do... :-/
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