se-edu / addressbook-level4 / 4689

93%

master: 94%

Pull #798

travis-ci

PersonCard: Add colors to tag labels

The tags are all displayed with the same color.

It is hard to differentiate between tags visually across contacts.
For example, it is hard to visually group all contacts tagged with
"colleague". It is also hard to differentiate between those contacts
that are tagged with "colleague", and those that are not tagged with
"colleague".

Let's add different colors to different tag labels. Tags of the same
name will always receive the same color, while different tag names
should receive different colors if possible.

The hashcode of the tag string is used to determine the tag color.
This will assign a reasonably random color to each tag, and will
also ensure that the tag color remains the same when the user
launches the application again in the future (assuming the
application version remains the same). The idea of using hashcode is
influenced by a developer's suggestion[1].

[1] https://github.com/nus-cs2103-AY1718S1/forum/issues/199

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