D22925: Fix POTD doesn't update

[Yunhe Guo]

guoyunhe created this revision.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
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REVISION SUMMARY
  Previous patch for Unsplash Wallpapers changed the identifier format. So we can not simply detect whether an identifier contains date by looking for `:`. This patch detect date string with regular expression.

REPOSITORY
  R114 Plasma Addons

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D22925

AFFECTED FILES
  dataengines/potd/potd.cpp

To: guoyunhe
Cc: plasma-devel, LeGast00n, jraleigh, fbampaloukas, GB_2, ragreen, Pitel, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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