a2billing customisation

=========Section 1 ========= Monthly Fee: 1. Add a monthly fee with each package (read the monthly fee from a configuration file instead of database for safety of update of a2billing) 2. At the end of a billing cycle, when invoice is generated, charge client with the monthly fee. Charge from balance and add the entry into invoice. Billing period is same as the telephone bills. (both phone call bill and monthly are post-paid) =========Section 2 ========= Add more info into pdf invoice for my a2billing. Existing pdf invoice will be provided and we need to add the following information: 1. Monthly Fee 2. Call history of Free Calls Free Calls ========== Data | Time | Destination | Description (e.g. Australia Landline) | min:sec (this is length of the call) | Amount XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX ---------------------------------- total: sum of length | sum of amount 3. Call history of Charged Calls Charged Calls ============= Data | Time | Destination | Description (e.g. Australia Landline) | min:sec (this is length of the call) | Amount XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX XXX | XXX | XXX | XXX |XXX | XXX total: sum of length | sum of amount =========Section 3========= Create a cron job. Run this cron job every night. 1. count how many unique destination numbers a client called in the last 24 hours. 2. if count of unique destination < N (N need to be setup from a configuration file) do nothing 3. if count of unique destination >= N, suspend this account 4. if count of unique destination >= N, get a list of unique destinations. Send an email the list to client's email and admin's email address saying the account has ben suppended and with the list. =========Section 4========= Transfer the credit card payment function form existing a2billing to the new one. (No new function need to be implemented) Functions includes: 1. add credit info form client interface 2. daily cron job 3. if there is an unpaid invoice, charge form credit card, add payment, mark the invoice as paid and refill the account.