/*
* Given a new post, match it with the most appropriate post (if possible).
*
* Conditions
* ----------
*
* If the new post was made by a buyer, then the matching post must have:
* -price less than or equal to that specified by buyer
* -book condition better than or equal to that specified by buyer
*
* If the new post was made by a seller, then the matching post must have:
* -price greater than or equal to that specified by seller
* -book condition worse than or equal to that specified by seller
*
*/
public static void Match(Post newPost)
{
if (!PostHandler.isPostAvailable(newPost.PostId))
{
return;
}
Post matchingPost = PostHandler.findMatchingPost(newPost);
if (matchingPost != null)
{
int buyerPostId = -1;
int sellerPostId = -1;
int buyerUserId = -1;
int sellerUserId = -1;
int initialPrice;
if (newPost.ActionBy == ActionBy.Buyer)
{
buyerPostId = newPost.PostId;
sellerPostId = matchingPost.PostId;
buyerUserId = newPost.UserId;
sellerUserId = matchingPost.UserId;
initialPrice = matchingPost.Price;
}
else
{
buyerPostId = matchingPost.PostId;
sellerPostId = newPost.PostId;
buyerUserId = matchingPost.UserId;
sellerUserId = newPost.UserId;
initialPrice = newPost.Price;
}
// Create transaction and transactionhistory for the matched buyer & seller
Transaction newTransaction = new Transaction(
-1, // id doesnt matter here
newPost.TextBookId,
sellerUserId,
buyerUserId,
sellerPostId,
buyerPostId,
null,
null,
initialPrice,
0,
1,
0,
DateTime.Now,
DateTime.Now
);
PostHandler.updatePostState(newPost.PostId, 1);
PostHandler.updatePostState(matchingPost.PostId, 1);
int transactionId = TransactionHandler.CreateTransaction(newTransaction);
newTransaction.TransactionId = transactionId;
TransactionHandler.CreateTransactionHistory(transactionId, buyerUserId);
TransactionHandler.CreateTransactionHistory(transactionId, sellerUserId);
}
}