hey guys,
I find myself in need of a new function added into a CF_Application that I
inherited along with this project/job.
I need to add a function that will allow for the updating of the quantity of
items in a cart.
I have the following:
<!--- 'ADD' function; needs ITEM, QTY and CART --->
<cfif Attributes.Function eq "add">
<!--- store the cart into a temporary variable --->
<cfset SC_temp = Evaluate(SC_cart) >
<!--- check to make sure the correct quantity is passed --->
<cfif (Attributes.Qty neq 0) AND (Len(Attributes.Qty) gt 0) >
<!--- check to see if the item already exists in the cart --->
<cfif ListContains(SC_temp, Attributes.Item, "*") >
<!--- set the position of the item in the 'main list' --->
<cfset SC_position = ListContains(SC_temp, Attributes.Item, "*") >
<!--- set the sub-list in the 'main list' to a temporary variable --->
<cfset SC_item = ListGetAt(SC_temp, SC_position, "*") >
<!--- add the old number to the new number --->
<cfset SC_qty = ListGetAt(SC_item, 2, "&") + Attributes.Qty >
<!--- change the quantity in the sub-list --->
<cfset SC_item = ListSetAt(SC_item, 2, SC_qty, "&") >
<!--- change the value of the entry in the 'main list' --->
<cfset SC_temp = ListSetAt(SC_temp, SC_position, SC_item, "*") >
<cfelse>
<!--- set up the item to add to the cart --->
<cfset SC_add = Trim(Attributes.Item) & "&" & Trim(Attributes.Qty) >
<!--- append the new item to the cart --->
<cfset SC_temp = ListAppend(SC_temp, SC_add, "*") >
</cfif>
<!--- set the count variable to zero --->
<cfset caller.ShoppingCart_Items = 0 >
<!--- loop for each item in the cart --->
<cfloop index="SC_index" list="#SC_temp#" delimiters="*">
<!--- set the count variable in the caller template --->
<cfset caller.ShoppingCart_Items = caller.ShoppingCart_Items +
ListGetAt(SC_index, 2, "&") >
</cfloop>
<!--- re-assign the cart to the client variable --->
<cfset "#SC_cart#" = SC_temp >
<cfelse>
<cfabort showerror="quantity error, should be a number greater than 0" >
</cfif>
<!--- 'REMOVE' function; needs ITEM, CART and may contain QTY --->
<cfelseif Attributes.Function eq "remove">
<!--- store the cart into a temporary variable --->
<cfset SC_temp = Evaluate(SC_cart) >
<!--- set the number of items to remove --->
<cfif (Attributes.Qty neq 0) AND (Len(Attributes.Qty) gt 0) >
<!--- if there is a number passed then set that number to the ammount to
remove --->
<cfset SC_remove = Attributes.Qty >
<cfelse>
<!--- if there is no quantity passed then remove only one item --->
<cfset SC_remove = 1 >
</cfif>
<!--- check to see if the item is in the 'main-list' if not just ignore the
command --->
<cfif ListContains(SC_temp, Attributes.Item, "*")>
<!--- item is in the cart, alter the quantity --->
<!--- set the position of the item in the main 'main list' --->
<cfset SC_position = ListContains(SC_temp, Attributes.Item, "*") >
<!--- set the sub-list in the 'main list' to a temporary variable --->
<cfset SC_item = ListGetAt(SC_temp, SC_position, "*") >
<!--- subtract the old number from the new number --->
<cfset SC_qty = ListGetAt(SC_item, 2, "&") - SC_remove >
<!--- check to see if the value is below zero, if it is remove the item from
the 'main list' --->
<cfif SC_qty lte 0>
<!--- less than/equal to zero, remove item from cart --->
<cfset SC_temp = ListDeleteAt(SC_temp, SC_position, "*") >
<cfelse>
<!--- still above zero, just replace quantity --->
<!--- change the quantity in the sub-list --->
<cfset SC_item = ListSetAt(SC_item, 2, SC_qty, "&") >
<!--- change the value of the entry in the 'main list' --->
<cfset SC_temp = ListSetAt(SC_temp, SC_position, SC_item, "*") >
</cfif>
</cfif>
<!--- set the count variable to zero --->
<cfset caller.ShoppingCart_Items = 0 >
<!--- loop for each item in the cart --->
<cfloop index="SC_index" list="#SC_temp#" delimiters="*">
<!--- set the count variable in the caller template --->
<cfset caller.ShoppingCart_Items = caller.ShoppingCart_Items +
ListGetAt(SC_index, 2, "&") >
</cfloop>
<!--- re-assign the cart to the client variable --->
<cfset "#SC_cart#" = SC_temp >
Knowing that, how would I go about making an "update" or "recalculate" function?
--
***********************************************
Jon Tillman
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ICQ: 4015362
http://www.eruditum.org
[EMAIL PROTECTED]
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