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Add realm setting to time-limit editing of message content.

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This is controlled through the admin tab and a new field in the Realms table.
Notes:
* The admin tab setting takes a value in minutes, whereas the backend stores it
  in seconds.
* This setting is unused when allow_message_editing is false.
* There is some generosity in how the limit is enforced. For instance, if the
  user sees the hovering edit button, we ensure they have at least 5 seconds to
  click it, and if the user gets to the message edit form, we ensure they have
  at least 10 seconds to make the edit, by relaxing the limit.
* This commit also includes a countdown timer in the message edit form.

Resolves #903.
This commit is contained in:
Rishi Gupta
2016-07-07 17:25:55 -07:00
committed by Tim Abbott
parent a8a2e13096
commit d529a94e4d
14 changed files with 384 additions and 21 deletions
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zerver/models.py
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@@ -143,7 +143,10 @@ class Realm(ModelReprMixin, models.Model):
mandatory_topics = models.BooleanField(default=False) # type: bool
show_digest_email = models.BooleanField(default=True) # type: bool
name_changes_disabled = models.BooleanField(default=False) # type: bool
allow_message_editing = models.BooleanField(default=True) # type: bool
DEFAULT_MESSAGE_CONTENT_EDIT_LIMIT_SECONDS = 600 # if changed, also change in admin.js
message_content_edit_limit_seconds = models.IntegerField(default=DEFAULT_MESSAGE_CONTENT_EDIT_LIMIT_SECONDS) # type: int
date_created = models.DateTimeField(default=timezone.now) # type: datetime.datetime
notifications_stream = models.ForeignKey('Stream', related_name='+', null=True, blank=True) # type: Optional[Stream]