Files
pmgr/site/models/statement_entry.php
abijah 011d1208e8 Initial thoughts on the charge reversal. It's obviously not working yet, or I wouldn't leave it hanging on a branch.
git-svn-id: file:///svn-source/pmgr/branches/alt_reversal_20090806@502 97e9348a-65ac-dc4b-aefc-98561f571b83
2009-08-07 04:20:20 +00:00

733 lines
25 KiB
PHP

<?php
class StatementEntry extends AppModel {
var $belongsTo = array(
'Transaction',
'Customer',
'Lease',
'Account',
// The charge to which this disbursement applies (if it is one)
'ChargeEntry' => array(
'className' => 'StatementEntry',
),
);
var $hasMany = array(
// The disbursements that apply to this charge (if it is one)
'DisbursementEntry' => array(
'className' => 'StatementEntry',
'foreignKey' => 'charge_entry_id',
),
);
var $default_log_level = array('log' => 30, 'show' => 15);
/**************************************************************************
**************************************************************************
**************************************************************************
* function: debit/creditTypes
*/
function debitTypes() {
return array('CHARGE', 'PAYMENT', 'REFUND');
}
function creditTypes() {
return array('DISBURSEMENT', 'WAIVER', 'REVERSAL', 'SURPLUS');
}
function voidTypes() {
return array('VOID');
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: chargeDisbursementFields
*/
function chargeDisbursementFields($sum = false, $entry_name = 'StatementEntry') {
$debits = $this->debitTypes();
$credits = $this->creditTypes();
$voids = $this->voidTypes();
foreach ($debits AS &$enum)
$enum = "'" . $enum . "'";
foreach ($credits AS &$enum)
$enum = "'" . $enum . "'";
foreach ($voids AS &$enum)
$enum = "'" . $enum . "'";
$debit_set = implode(", ", $debits);
$credit_set = implode(", ", $credits);
$void_set = implode(", ", $voids);
$fields = array
(
($sum ? 'SUM(' : '') .
"IF({$entry_name}.type IN ({$debit_set})," .
" {$entry_name}.amount, NULL)" .
($sum ? ')' : '') . ' AS charge' . ($sum ? 's' : ''),
($sum ? 'SUM(' : '') .
"IF({$entry_name}.type IN({$credit_set})," .
" {$entry_name}.amount, NULL)" .
($sum ? ')' : '') . ' AS disbursement' . ($sum ? 's' : ''),
($sum ? 'SUM(' : '') .
"IF({$entry_name}.type IN ({$debit_set}), 1," .
" IF({$entry_name}.type IN ({$credit_set}), -1, 0))" .
" * IF({$entry_name}.amount, {$entry_name}.amount, 0)" .
($sum ? ')' : '') . ' AS balance',
);
if ($sum)
$fields[] = "COUNT({$entry_name}.id) AS entries";
return $fields;
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: verifyStatementEntry
* - Verifies consistenty of new statement entry data
* (not in a pre-existing statement entry)
*/
function verifyStatementEntry($entry) {
$this->prFunctionLevel(10);
$this->prEnter(compact('entry'));
if (empty($entry['type']) ||
//empty($entry['effective_date']) ||
empty($entry['account_id']) ||
empty($entry['amount'])
) {
return $this->prReturn(false);
}
return $this->prReturn(true);
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: addStatementEntry
* - Inserts new Statement Entry into the database
*/
function addStatementEntry($entry) {
$this->prEnter(compact('entry'));
$ret = array();
if (!$this->verifyStatementEntry($entry))
return array('error' => true, 'verify_data' => $entry) + $ret;
$this->pr(20, array('checkpoint' => 'Pre-Save')
+ compact('entry'));
$this->create();
if (!$this->save($entry))
return array('error' => true, 'save_data' => $entry) + $ret;
$ret['statement_entry_id'] = $this->id;
return $this->prReturn($ret + array('error' => false));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: waive
* - Waives the charge balance
*
*/
function waive($id, $stamp = null) {
$this->prEnter(compact('id', 'stamp'));
// Get the basic information about the entry to be waived.
$this->recursive = -1;
$charge = $this->read(null, $id);
$charge = $charge['StatementEntry'];
if ($charge['type'] !== 'CHARGE')
INTERNAL_ERROR("Waiver item is not CHARGE.");
// Query the stats to get the remaining balance
$stats = $this->stats($id);
// Build a transaction
$waiver = array('Transaction' => array(), 'Entry' => array());
$waiver['Transaction']['stamp'] = $stamp;
$waiver['Transaction']['comment'] = "Charge Waiver";
// Add the charge waiver
$waiver['Entry'][] =
array('amount' => $stats['Charge']['balance'],
'account_id' => $this->Account->waiverAccountID(),
'comment' => null,
);
// Record the waiver transaction
return $this->prReturn($this->Transaction->addWaiver
($waiver, $id, $charge['customer_id'], $charge['lease_id']));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: reverse
* - Reverses the charges
*
*/
function reverse($id, $balance = false, $stamp = null) {
$this->prEnter(compact('id', 'balance', 'stamp'));
$ret = array();
// Get the basic information about the entry to be reversed.
$this->recursive = -1;
$charge = $this->read(null, $id);
$charge = $charge['StatementEntry'];
if ($charge['type'] !== 'CHARGE')
INTERNAL_ERROR("Reversal item is not CHARGE.");
// Build a transaction
$reversal = array('Transaction' => array(), 'Entry' => array());
$reversal['Transaction']['stamp'] = $stamp;
$reversal['Transaction']['comment'] = "Credit Note: Charge Reversal";
$voided_entry_transactions = array();
$reconciled = $this->reconciledEntries($id);
$this->pr(21, compact('reconciled'));
if ($reconciled && !$balance) {
foreach ($reconciled['entries'] AS $entry) {
if ($entry['DisbursementEntry']['type'] === 'REVERSAL')
INTERNAL_ERROR("Charge has already been reversed");
/* $voided_entry_transactions[$entry['DisbursementEntry']['transaction_id']] */
/* = array_intersect_key($entry['DisbursementEntry'], */
/* array('customer_id'=>1, 'lease_id'=>1)); */
/* $reversal['Entry'][] = */
/* array_intersect_key($entry['DisbursementEntry'], */
/* array_flip(array('amount', 'account_id', 'charge_entry_id'))) */
/* + array('type' => 'SURPLUS', */
/* 'comment' => 'Release of funds applied to reversed charge', */
/* ); */
}
/* $this->pr(17, compact('voided_entry_transactions')); */
}
// Query the stats to get the remaining balance
$stats = $this->stats($id);
// Add the charge reversal
$reversal['Entry'][] =
array('charge_entry_id' => $id,
'amount' => -1 * $stats['Charge'][$balance ? 'balance' : 'total'],
'account_id' => $charge['account_id'],
'comment' => 'Charge Reversal',
);
// Record the reversal transaction
$result = $this->Transaction->addReversal
($reversal, $id, $charge['customer_id'], $charge['lease_id']);
$this->pr(21, compact('result'));
$ret['reversal'] = $result;
if ($result['error'])
$ret['error'] = true;
foreach ($voided_entry_transactions AS $transaction_id => $tx) {
$result = $this->assignCredits
(null,
$transaction_id,
null,
null,
$tx['customer_id'],
$tx['lease_id']
);
$this->pr(21, compact('result'));
$ret['assigned'][] = $result;
if ($result['error'])
$ret['error'] = true;
}
return $this->prReturn($ret + array('error' => false));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: reconciledSet
* - Returns the set of entries satisfying the given conditions,
* along with any entries that they reconcile
*/
function reconciledSetQuery($set, $query) {
$this->queryInit($query);
if (in_array($set, $this->debitTypes()))
$query['link']['DisbursementEntry'] = array('fields' => array("SUM(DisbursementEntry.amount) AS reconciled"));
elseif (in_array($set, $this->creditTypes()))
$query['link']['ChargeEntry'] = array('fields' => array("SUM(ChargeEntry.amount) AS reconciled"));
else
die("INVALID RECONCILE SET");
$query['conditions'][] = array('StatementEntry.type' => $set);
$query['group'] = 'StatementEntry.id';
return $query;
}
function reconciledSet($set, $query = null, $unrec = false, $if_rec_include_partial = false) {
//$this->prFunctionLevel(array('log' => 16, 'show' => 10));
$this->prEnter(compact('set', 'query', 'unrec', 'if_rec_include_partial'));
$lquery = $this->reconciledSetQuery($set, $query);
$result = $this->find('all', $lquery);
$this->pr(20, compact('lquery', 'result'));
$resultset = array();
foreach ($result AS $i => $entry) {
$this->pr(25, compact('entry'));
if (!empty($entry[0]))
$entry['StatementEntry'] = $entry[0] + $entry['StatementEntry'];
unset($entry[0]);
$entry['StatementEntry']['balance'] =
$entry['StatementEntry']['amount'] - $entry['StatementEntry']['reconciled'];
// Since HAVING isn't a builtin feature of CakePHP,
// we'll have to post-process to get the desired entries
if ($entry['StatementEntry']['balance'] == 0)
$reconciled = true;
elseif ($entry['StatementEntry']['reconciled'] == 0)
$reconciled = false;
else // Partial disbursement; depends on unrec
$reconciled = (!$unrec && $if_rec_include_partial);
// Add to the set, if it's been requested
if ($reconciled == !$unrec)
$resultset[] = $entry;
}
return $this->prReturn(array('entries' => $resultset,
'summary' => $this->stats(null, $query)));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: reconciledEntries
* - Returns a list of entries that reconcile against the given entry.
* (such as disbursements towards a charge).
*/
function reconciledEntriesQuery($id, $query = null) {
$this->queryInit($query, false);
$this->id = $id;
$this->recursive = -1;
$this->read();
$query['conditions'][] = array('StatementEntry.id' => $id);
if (in_array($this->data['StatementEntry']['type'], $this->debitTypes())) {
$query['link']['DisbursementEntry'] = array();
$query['conditions'][] = array('DisbursementEntry.id !=' => null);
}
if (in_array($this->data['StatementEntry']['type'], $this->creditTypes())) {
$query['link']['ChargeEntry'] = array();
$query['conditions'][] = array('ChargeEntry.id !=' => null);
}
return $query;
}
function reconciledEntries($id, $query = null) {
$this->prEnter(compact('id', 'query'));
$lquery = $this->reconciledEntriesQuery($id, $query);
$result = $this->find('all', $lquery);
foreach (array_keys($result) AS $i)
unset($result[$i]['StatementEntry']);
return $this->prReturn(array('entries' => $result));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: assignCredits
* - Assigns all credits to existing charges
*
* REVISIT <AP>: 20090726
* This algorithm shouldn't be hardcoded. We need to allow
* the user to specify how disbursements should be applied.
*
*/
function assignCredits($query = null, $receipt_id = null,
$charge_ids = null, $disbursement_type = null,
$customer_id = null, $lease_id = null)
{
//$this->prFunctionLevel(25);
$this->prEnter(compact('query', 'receipt_id',
'charge_ids', 'disbursement_type',
'customer_id', 'lease_id'));
$this->queryInit($query);
if (!empty($customer_id))
$query['conditions'][] = array('StatementEntry.customer_id' => $customer_id);
if (empty($disbursement_type))
$disbursement_type = 'DISBURSEMENT';
$ret = array();
// First, find all known credits, unless this call is to make
// credit adjustments to a specific charge
// REVISIT <AP>: 20090806
// If the theory below is correct, we should only search for
// explicit credits if we don't have a receipt_id
if (empty($charge_ids)) {
$lquery = $query;
$lquery['conditions'][] = array('StatementEntry.type' => 'SURPLUS');
// REVISIT <AP>: 20090804
// We need to ensure that we're using surplus credits ONLY from either
// the given lease, or those that do not apply to any specific lease.
// However, by doing this, it forces any lease surplus amounts to
// remain frozen with that lease until either there is a lease charge,
// we refund the money, or we "promote" that surplus to the customer
// level and out of the leases direct control.
// That seems like a pain. Perhaps we should allow any customer
// surplus to be used on any customer charge.
$lquery['conditions'][] =
array('OR' =>
array(array('StatementEntry.lease_id' => null),
(!empty($lease_id)
? array('StatementEntry.lease_id' => $lease_id)
: array()),
));
$lquery['order'][] = 'StatementEntry.effective_date ASC';
$credits = $this->find('all', $lquery);
$this->pr(18, compact('credits'),
"Credits Established");
}
else {
if (empty($receipt_id))
INTERNAL_ERROR("Can't make adjustments to a charge without a receipt ID.");
}
// Next, establish credit from the newly added receipt
$receipt_credit = null;
if (!empty($receipt_id)) {
$lquery =
array('link' =>
array('StatementEntry',
'LedgerEntry' =>
array('conditions' =>
array('LedgerEntry.account_id !=' =>
$this->Account->accountReceivableAccountID()),
),
),
'conditions' => array('Transaction.id' => $receipt_id),
'fields' => array('Transaction.id', 'Transaction.stamp', 'Transaction.amount'),
);
$receipt_credit = $this->Transaction->find('first', $lquery);
if (!$receipt_credit)
INTERNAL_ERROR("Unable to locate receipt.");
//$reconciled = $this->reconciledEntries($id);
$stats = $this->Transaction->stats($receipt_id);
$receipt_credit['balance'] =
$receipt_credit['Transaction']['amount'] - $stats['Disbursement']['total'];
$this->pr(18, compact('receipt_credit'),
"Receipt Credit Added");
}
// Now find all unpaid charges
if (isset($charge_ids)) {
$lquery = array('contain' => false,
'conditions' => array('StatementEntry.id' => $charge_ids));
} else {
$lquery = $query;
// If we're working with a specific lease, then limit charges to it
if (!empty($lease_id))
$lquery['conditions'][] = array('StatementEntry.lease_id' => $lease_id);
}
$lquery['order'] = 'StatementEntry.effective_date ASC';
$charges = array();
foreach ($this->debitTypes() AS $dtype) {
$rset = $this->reconciledSet($dtype, $lquery, true);
$entries = $rset['entries'];
$charges = array_merge($charges, $entries);
$this->pr(18, compact('dtype', 'entries'), "Outstanding Debit Entries");
}
// Initialize our list of used credits
$used_credits = array();
// REVISIT <AP>: 20090806
// Testing a theory. We should never have
// explicit credits, as well as a new receipt,
// and yet have outstanding charges.
if (!empty($credits) && !empty($receipt_credit) && !empty($charges))
INTERNAL_ERROR("Explicit credits that haven't already been applied.");
// Work through all unpaid charges, applying disbursements as we go
foreach ($charges AS $charge) {
$this->pr(20, compact('charge'),
'Process Charge');
// Check that we have available credits.
// Technically, this isn't necessary, since the loop
// will handle everything just fine. However, this
// just saves extra processing if/when there is no
// means to resolve a charge anyway.
if (empty($credits) && empty($receipt_credit['balance'])) {
$this->pr(17, 'No more available credits');
break;
}
$charge['balance'] = $charge['StatementEntry']['balance'];
while ($charge['balance'] > 0 &&
(!empty($credits) || !empty($receipt_credit['balance']))) {
$this->pr(20, compact('charge'),
'Attempt Charge Reconciliation');
// Use explicit credits before using implicit credits
// (Not sure it matters though).
if (!empty($credits)) {
// Peel off the first credit available
$credit =& $credits[0];
$disbursement_date = $credit['StatementEntry']['effective_date'];
$disbursement_transaction_id = $credit['StatementEntry']['transaction_id'];
$disbursement_account_id = $credit['StatementEntry']['account_id'];
if (!isset($credit['balance']))
$credit['balance'] = $credit['StatementEntry']['amount'];
}
elseif (!empty($receipt_credit['balance'])) {
// Use our only receipt credit
$credit =& $receipt_credit;
$disbursement_date = $credit['Transaction']['stamp'];
$disbursement_transaction_id = $credit['Transaction']['id'];
$disbursement_account_id = $credit['LedgerEntry']['account_id'];
}
else {
die("HOW DID WE GET HERE WITH NO SURPLUS?");
}
// Set the disbursement amount to the maximum amount
// possible without exceeding the charge or credit balance
$disbursement_amount = min($charge['balance'], $credit['balance']);
if (!isset($credit['applied']))
$credit['applied'] = 0;
$credit['applied'] += $disbursement_amount;
$credit['balance'] -= $disbursement_amount;
$this->pr(20, compact('credit'),
($credit['balance'] > 0 ? 'Utilized' : 'Exhausted') .
(!empty($credits) ? ' Credit' : ' Receipt'));
if ($credit['balance'] < 0)
die("HOW DID WE END UP WITH NEGATIVE SURPLUS BALANCE?");
// If we've exhausted the credit, get it out of the
// available credit pool (but keep track of it for later).
if ($credit['balance'] <= 0 && !empty($credits))
$used_credits[] = array_shift($credits);
// Add a disbursement that uses the available credit to pay the charge
$disbursement = array('type' => $disbursement_type,
'account_id' => $disbursement_account_id,
'amount' => $disbursement_amount,
'effective_date' => $disbursement_date,
'transaction_id' => $disbursement_transaction_id,
'customer_id' => $charge['StatementEntry']['customer_id'],
'lease_id' => $charge['StatementEntry']['lease_id'],
'charge_entry_id' => $charge['StatementEntry']['id'],
'comment' => null,
);
$this->pr(20, compact('disbursement'),
'New Disbursement Entry');
$result = $this->addStatementEntry($disbursement);
$ret['Disbursement'][] = $result;
if ($result['error'])
$ret['error'] = true;
// Adjust the charge balance to reflect the new disbursement
$charge['balance'] -= $disbursement_amount;
if ($charge['balance'] < 0)
die("HOW DID WE GET A NEGATIVE CHARGE AMOUNT?");
if ($charge['balance'] <= 0)
$this->pr(20, 'Fully Paid Charge');
}
}
// Partially used credits must be added to the used list
if (isset($credits[0]['applied']))
$used_credits[] = array_shift($credits);
$this->pr(18, compact('credits', 'used_credits', 'receipt_credit'),
'Disbursements added');
// Clean up any explicit credits that have been used
foreach ($used_credits AS $credit) {
if ($credit['balance'] > 0) {
$this->pr(20, compact('credit'),
'Update Credit Entry');
$this->id = $credit['StatementEntry']['id'];
$this->saveField('amount', $credit['balance']);
}
else {
$this->pr(20, compact('credit'),
'Delete Exhausted Credit Entry');
$this->del($credit['StatementEntry']['id'], false);
}
}
// Convert non-exhausted receipt credit to an explicit one
if (!empty($receipt_credit['balance'])) {
$credit =& $receipt_credit;
$explicit_credit = $this->find
('first', array('contain' => false,
'conditions' =>
array(array('transaction_id' => $credit['Transaction']['id']),
array('type' => 'SURPLUS')),
));
if (empty($explicit_credit)) {
$this->pr(18, compact('credit'),
'Create Explicit Credit');
$result = $this->addStatementEntry
(array('type' => 'SURPLUS',
'account_id' => $credit['LedgerEntry']['account_id'],
'amount' => $credit['balance'],
'effective_date' => $credit['Transaction']['stamp'],
'transaction_id' => $credit['Transaction']['id'],
'customer_id' => $customer_id,
'lease_id' => $lease_id,
));
$ret['Credit'] = $result;
if ($result['error'])
$ret['error'] = true;
}
else {
$this->pr(18, compact('explicit_credit', 'credit'),
'Update Explicit Credit');
$EC = new StatementEntry();
$EC->id = $explicit_credit['StatementEntry']['id'];
$EC->saveField('amount', $credit['balance']);
}
}
return $this->prReturn($ret + array('error' => false));
}
/**************************************************************************
**************************************************************************
**************************************************************************
* function: stats
* - Returns summary data from the requested statement entry
*/
function stats($id = null, $query = null) {
$this->prFunctionLevel(array('log' => 19, 'show' => 10));
$this->prEnter(compact('id', 'query'));
$this->queryInit($query);
unset($query['group']);
$stats = array();
if (isset($id))
$query['conditions'][] = array('StatementEntry.id' => $id);
$types = array('Charge', 'Disbursement');
foreach ($types AS $type_index => $this_name) {
$that_name = $types[($type_index + 1) % 2];
if ($this_name === 'Charge') {
$this_types = $this->debitTypes();
$that_types = $this->creditTypes();
} else {
$this_types = $this->creditTypes();
$that_types = $this->debitTypes();
}
$this_query = $query;
$this_query['fields'] = array();
$this_query['fields'][] = "SUM(StatementEntry.amount) AS total";
$this_query['conditions'][] = array('StatementEntry.type' => $this_types);
$result = $this->find('first', $this_query);
$stats[$this_name] = $result[0];
$this->pr(17, compact('this_query', 'result'), $this_name.'s');
// Tally the different types that result in credits towards the charges
$stats[$this_name]['reconciled'] = 0;
foreach ($that_types AS $that_type) {
$lc_that_type = strtolower($that_type);
$that_query = $this_query;
$that_query['link']["{$that_name}Entry"] = array('fields' => array());
$that_query['fields'] = array();
if ($this_name == 'Charge')
$that_query['fields'][] = "COALESCE(SUM(${that_name}Entry.amount),0) AS $lc_that_type";
else
$that_query['fields'][] = "COALESCE(SUM(StatementEntry.amount), 0) AS $lc_that_type";
$that_query['conditions'][] = array("{$that_name}Entry.type" => $that_type);
$result = $this->find('first', $that_query);
$stats[$this_name] += $result[0];
$this->pr(17, compact('that_query', 'result'), "{$this_name}s: $that_type");
$stats[$this_name]['reconciled'] += $stats[$this_name][$lc_that_type];
}
// Compute balance information for charges
$stats[$this_name]['balance'] =
$stats[$this_name]['total'] - $stats[$this_name]['reconciled'];
if (!isset($stats[$this_name]['balance']))
$stats[$this_name]['balance'] = 0;
}
// 'balance' is simply the difference between
// the balances of charges and disbursements
$stats['balance'] = $stats['Charge']['balance'] - $stats['Disbursement']['balance'];
if (!isset($stats['balance']))
$stats['balance'] = 0;
// 'account_balance' is really only relevant to
// callers that have requested charge and disbursement
// stats with respect to a particular account.
// It represents the difference between inflow
// and outflow from that account.
$stats['account_balance'] = $stats['Charge']['reconciled'] - $stats['Disbursement']['total'];
if (!isset($stats['account_balance']))
$stats['account_balance'] = 0;
return $this->prReturn($stats);
}
}