SeekAction is designed to handle of commands FIND X, LOOK FOR Y or SEARCH FOR Z, when they don't seem to be intended as attempts to look something up in a Consultable. We make it a TopicAction so that it will match whatever the player types, and so not give away any premature spoilery information by the nature of the parser's response.

The appropriate response then depends on the player character's state of knowledge. In the most general case the player is simply given instructions on how to go about looking for things. This hardly seems appropriate, however if the object requested is in plain sight, in which case we point this out to the player. As a courtesy to the player, we also remind him or her of where an object was last seen, if it has been seen.

One or two complications need to be dealt with. If the player finds something like FIND SMELL or FIND NOISE then we should describe it as having been smelt or heard elsewhere, not seen. We also want to make sure that the command never matches an Unthing in preference to a Thing, and that if an Unthing is matched it is not described as being present.

// :   SeekAction