2 /**********************************************************************
3 Copyright (C) FrontAccounting, LLC.
4 Released under the terms of the GNU General Public License, GPL,
5 as published by the Free Software Foundation, either version 3
6 of the License, or (at your option) any later version.
7 This program is distributed in the hope that it will be useful,
8 but WITHOUT ANY WARRANTY; without even the implied warranty of
9 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
10 See the License here <http://www.gnu.org/licenses/gpl-3.0.html>.
11 ***********************************************************************/
12 function get_qoh_on_date($stock_id, $location=null, $date_=null)
17 $date = date2sql($date_);
18 $sql = "SELECT SUM(qty)
19 FROM ".TB_PREF."stock_moves st
20 LEFT JOIN ".TB_PREF."voided v ON st.type=v.type AND st.trans_no=v.id
22 AND stock_id=".db_escape($stock_id)."
23 AND tran_date <= '$date'";
25 if ($location != null)
26 $sql .= " AND loc_code = ".db_escape($location);
28 $result = db_query($sql, "QOH calculation failed");
30 $myrow = db_fetch_row($result);
33 return $qoh ? $qoh : 0;
37 * Check whether change in stock on date would not cause negative qoh in stock history.
38 * Returns null on success or max. available quantity with respective date otherwise.
39 * Running balance is checked on daily basis only, as we do not control time of transaction.
41 * $delta_qty - tested change in stock qty at $date.
42 * $date - check date; when set to null checks all the stock history.
45 function check_negative_stock($stock_id, $delta_qty, $location=null, $date=null)
49 return null; // qty increese is always safe
54 $date = date2sql($date);
56 // check stock status on date
57 $sql = "SELECT SUM(qty) qty, '$date' tran_date FROM ".TB_PREF."stock_moves
58 WHERE stock_id=".db_escape($stock_id)."
59 AND tran_date <= '$date'";
62 $sql .= " AND loc_code = ".db_escape($location);
64 $result = db_query($sql, "QOH calculation failed");
65 $qos = db_fetch_assoc($result);
67 // check also all stock changes after the date to avoid negative stock in future
68 $sql = TB_PREF."stock_moves WHERE stock_id=".db_escape($stock_id) . " AND tran_date > '$date'";
71 $sql .= " AND loc_code=".db_escape($location);
73 $rt = running_total_sql($sql, 'qty', 'tran_date');
75 $sql = "SELECT {$qos['qty']}+total qty, tran_date FROM ($rt) stock_status ORDER by total, tran_date";
76 $history = db_query($sql, 'cannot check stock history');
77 $min_qos = db_fetch($history);
79 if ($min_qos && ($min_qos['qty'] < $qos['qty']))
82 return -$delta_qty > $qos['qty'] ? $qos : null;
85 //--------------------------------------------------------------------------------------
87 function get_item_edit_info($stock_id)
89 $sql = "SELECT item.material_cost, item.units, unit.decimals
90 FROM ".TB_PREF."stock_master item,"
91 .TB_PREF."item_units unit
92 WHERE stock_id=".db_escape($stock_id)
93 ." AND item.units=unit.abbr";
94 $result = db_query($sql, "The standard cost cannot be retrieved");
96 return db_fetch($result);
99 //--------------------------------------------------------------------------------------
101 function get_unit_cost($stock_id)
103 $sql = "SELECT material_cost
104 FROM ".TB_PREF."stock_master
105 WHERE stock_id=".db_escape($stock_id);
106 $result = db_query($sql, "The standard cost cannot be retrieved");
108 $myrow = db_fetch_row($result);
113 //--------------------------------------------------------------------------------------
115 function get_purchase_cost($stock_id)
117 $sql = "SELECT purchase_cost
118 FROM ".TB_PREF."stock_master
119 WHERE stock_id=".db_escape($stock_id);
120 $result = db_query($sql, "The purchase cost cannot be retrieved");
122 $myrow = db_fetch_row($result);
127 //--------------------------------------------------------------------------------------
129 function is_inventory_item($stock_id)
131 $sql = "SELECT stock_id FROM "
132 .TB_PREF."stock_master
133 WHERE stock_id=".db_escape($stock_id)." AND mb_flag <> 'D'";
134 $result = db_query($sql, "Cannot query is inventory item or not");
136 return db_num_rows($result) > 0;
139 //-------------------------------------------------------------------
141 function last_negative_stock_begin_date($stock_id, $to)
146 $sql = "SET @flag = 0";
148 $sql = "SELECT SUM(qty), @q:= @q + qty, IF(@q < 0 AND @flag=0, @flag:=1,@flag:=0), IF(@q < 0 AND @flag=1, tran_date,'') AS begin_date
149 FROM ".TB_PREF."stock_moves
150 WHERE stock_id=".db_escape($stock_id)." AND tran_date<='$to'
152 GROUP BY stock_id ORDER BY tran_date";
154 $result = db_query($sql, "The dstock moves could not be retrieved");
155 $row = db_fetch_row($result);
159 //-------------------------------------------------------------------
161 function get_already_delivered($stock_id, $location, $trans_no)
164 FROM ".TB_PREF."stock_moves
165 WHERE stock_id = ".db_escape($stock_id)."
166 AND loc_code = ".db_escape($location)."
167 AND type=".ST_CUSTDELIVERY." AND trans_no=".db_escape($trans_no);
168 $result = db_query($sql, "Could not get stock moves");
169 $row = db_fetch_row($result);
173 Returns start move_id in latest negative status period for $stock_id
176 function last_negative_stock_trans_id($stock_id, $to)
178 $sql = "SELECT * from ".TB_PREF."stock_moves
179 WHERE stock_id=".db_escape($stock_id)."
180 AND qty <> 0 order by trans_id asc";
182 $result = db_query($sql, "The query on stock moves failed.");
186 $negative_trans_id = -1;
188 while ($myrow = db_fetch($result))
190 $qty += $myrow['qty'];
191 if ($qty < 0 && $flag == 0)
194 $negative_trans_id = $myrow['trans_id'];
201 return $negative_trans_id;
206 //-------------------------------------------------------------------
208 function get_deliveries_between($stock_id, $from, $to)
210 $from = date2sql($from);
212 $sql = "SELECT SUM(-qty), SUM(-qty*standard_cost) FROM ".TB_PREF."stock_moves
213 WHERE type=".ST_CUSTDELIVERY." AND stock_id=".db_escape($stock_id)." AND
214 tran_date>='$from' AND tran_date<='$to' GROUP BY stock_id";
216 $result = db_query($sql, "The deliveries could not be updated");
217 return db_fetch_row($result);
221 Returns quantity and total cost of $stock_id sales, entered after record with $move_id
223 function get_deliveries_from_trans($stock_id, $move_id)
225 // -ve qty is delivery either by ST_CUSTDELIVERY or inventory adjustment
226 //Price for GRN and SUPPCREDIT and std_cost for other trans_types
227 $sql = "SELECT SUM(-qty), SUM(-qty*IF(type=".ST_SUPPRECEIVE." OR type=".ST_SUPPCREDIT.", price, standard_cost))
228 FROM ".TB_PREF."stock_moves
229 WHERE stock_id=".db_escape($stock_id)." AND qty < 0 AND
230 trans_id>='$move_id' GROUP BY stock_id";
231 $result = db_query($sql, "The deliveries could not be updated");
232 $row = db_fetch_row($result);
234 $sql = "SELECT IF(type=".ST_SUPPRECEIVE." OR type=".ST_SUPPCREDIT.", price, standard_cost)
235 FROM ".TB_PREF."stock_moves
236 WHERE stock_id=".db_escape($stock_id)
237 ." AND trans_id ='$move_id'";
238 $result = db_query($sql, "The deliveries could not be updated");
239 $cost = db_fetch_row($result);
241 // Adjusting QOH valuation
242 $sql = "SELECT SUM(qty)
243 FROM ".TB_PREF."stock_moves
244 WHERE stock_id=".db_escape($stock_id)." AND
245 trans_id<'$move_id' GROUP BY stock_id";
246 $result = db_query($sql, "The deliveries could not be updated");
247 $qoh = db_fetch_row($result);
249 $qty = $row[0] - $qoh[0]; //QOH prior to -ve stock is subtracted
250 $final_cost = $row[1] - $qoh[0]*$cost[0];
252 return array($qty,$final_cost);
256 Returns quantity and total cost of $stock_id purchases, entered after record with $move_id
258 function get_purchases_from_trans($stock_id, $move_id)
260 // Calculate All inward stock moves i.e. qty > 0
261 $sql = "SELECT SUM(qty), SUM(qty*standard_cost)
262 FROM ".TB_PREF."stock_moves
263 WHERE stock_id=".db_escape($stock_id)." AND qty > 0 AND
264 trans_id>'$move_id' GROUP BY stock_id";
265 $result = db_query($sql, "Could not get get_purchases_from_trans");
266 $row = db_fetch_row($result);
271 //-------------------------------------------------------------------
273 This routine fixes stock and COGS balances for all $stock_id sales made during negative inventory status.
274 This is called when delivery is received causing inventory status to be positive again.
276 function adjust_deliveries($stock_id, $material_cost, $to)
280 if (!is_inventory_item($stock_id))
283 $move_id = last_negative_stock_trans_id($stock_id, $to);
284 if ($move_id == false || $move_id == -1)
287 $row = get_deliveries_from_trans($stock_id, $move_id);
291 $old_sales_cost = $row[1];
292 $new_sales_cost = $row[0] * $material_cost;
293 $sales_diff = $new_sales_cost - $old_sales_cost;
295 $row = get_purchases_from_trans($stock_id, $move_id);
297 $old_purchase_cost = $new_purchase_cost = 0;
300 $old_purchase_cost = $row[1];
301 $new_purchase_cost = $row[0] * $material_cost;
302 $purchase_diff = $new_purchase_cost - $old_purchase_cost;
305 $diff = $sales_diff - $purchase_diff;
309 $stock_gl_code = get_stock_gl_code($stock_id);
311 $dec = user_price_dec();
312 $old_cost = -round2($old_sales_cost-$old_purchase_cost,$dec);
313 $new_cost = -round2($new_sales_cost-$new_purchase_cost,$dec);
315 $cart = new items_cart(ST_COSTUPDATE);
316 $cart->tran_date = $cart->doc_date = $cart->event_date = $to;
317 if (!is_date_in_fiscalyear($cart->tran_date))
318 $cart->tran_date = end_fiscalyear();
319 $cart->reference = $Refs->get_next(ST_COSTUPDATE, null, $cart->tran_date, $to);
321 $cart->memo_ = _("Cost was ") . $old_cost. _(" changed to ") . $new_cost . _(" for item ")."'$stock_id'";
323 $cart->add_gl_item($stock_gl_code["cogs_account"], $stock_gl_code["dimension_id"], $stock_gl_code["dimension2_id"], $diff);
324 $cart->add_gl_item($stock_gl_code["inventory_account"], 0, 0, -$diff);
326 write_journal_entries($cart);
330 function get_stock_gl_code($stock_id)
332 /*Gets the GL Codes relevant to the item account */
333 $sql = "SELECT mb_flag, inventory_account, cogs_account,
334 adjustment_account, sales_account, wip_account, dimension_id, dimension2_id FROM
335 ".TB_PREF."stock_master WHERE stock_id = ".db_escape($stock_id);
337 $get = db_query($sql,"retreive stock gl code");
338 return db_fetch($get);
341 function get_purchase_value($stock_id)
343 $sql = "SELECT purchase_cost FROM
344 ".TB_PREF."stock_master WHERE stock_id = ".db_escape($stock_id);
346 $result = db_query($sql,"retreive stock purchase price");
347 $row = db_fetch_row($result);
351 function update_purchase_value($stock_id, $price)
353 $price = round2($price, user_price_dec());
354 $sql = "UPDATE ".TB_PREF."stock_master SET purchase_cost=".db_escape($price)
355 ." WHERE stock_id=".db_escape($stock_id);
356 db_query($sql, "The stock master purchase_cost cannot be updated");
358 //-----------------------------------------------------------------------------------------
360 function handle_negative_inventory($stock_id, $quantity, $standard_cost, $date_)
362 //If negative adjustment result in negative or zero inventory
363 //then difference should be adjusted
364 $qoh = get_qoh_on_date($stock_id);
366 if ($qoh + $quantity <= 0 && $qoh > 0) //Positive inventory turning zero/negative
370 $id = get_next_trans_no(ST_JOURNAL);
371 $ref = $Refs->get_next(ST_JOURNAL, null, $date_);
372 $diff = round($qoh*get_unit_cost($stock_id) + $quantity*$standard_cost, user_price_dec());
377 add_journal(ST_JOURNAL, $id, $diff, $date_, get_company_currency(), $ref);
378 $Refs->save(ST_JOURNAL, $id, $ref);
380 $stock_gl_code = get_stock_gl_code($stock_id);
381 $memo = _("Zero/negative inventory handling");
382 //Reverse the inventory effect if $qoh <=0
383 add_gl_trans_std_cost(ST_JOURNAL, $id, $date_,
384 $stock_gl_code["inventory_account"],
385 $stock_gl_code['dimension_id'], $stock_gl_code['dimension2_id'], $memo,
387 //GL Posting to inventory adjustment account
388 add_gl_trans_std_cost(ST_JOURNAL, $id, $date_,
389 $stock_gl_code["adjustment_account"],
390 $stock_gl_code['dimension_id'], $stock_gl_code['dimension2_id'], $memo,
393 add_audit_trail(ST_JOURNAL, $id, $date_);
394 add_comments(ST_JOURNAL, $id, $date_, $memo);
395 $Refs->save(ST_JOURNAL, $id, $ref);
396 commit_transaction();
401 //--------------------------------------------------------------------------------------
403 // $date_ - display / non-sql date
404 // $std_cost - in HOME currency
405 // $price - in transaction currency
407 function add_stock_move($type, $stock_id, $trans_no, $location,
408 $date_, $reference, $quantity, $std_cost, $price=0)
410 $date = date2sql($date_);
412 $sql = "INSERT INTO ".TB_PREF."stock_moves (stock_id, trans_no, type, loc_code,
413 tran_date, reference, qty, standard_cost, price) VALUES ("
414 .db_escape($stock_id).", ".db_escape($trans_no).", "
415 .db_escape($type).", ".db_escape($location).", '$date', "
416 .db_escape($reference).", "
417 .db_escape($quantity).", ".db_escape($std_cost)."," .db_escape($price).")";
419 db_query($sql, "The stock movement record cannot be inserted");
421 return db_insert_id();
424 function update_stock_move($type, $trans_no, $stock_id, $cost)
426 $sql = "UPDATE ".TB_PREF."stock_moves SET standard_cost=".db_escape($cost)
427 ." WHERE type=".db_escape($type)
428 ." AND trans_no=".db_escape($trans_no)
429 ." AND stock_id=".db_escape($stock_id);
430 db_query($sql, "The stock movement standard_cost cannot be updated");
433 //--------------------------------------------------------------------------------------------------
435 function get_stock_moves($type, $type_no)
437 $sql = "SELECT move.*, item.description, item.mb_flag, item.units, stock.location_name
438 FROM ".TB_PREF."stock_moves move,"
439 .TB_PREF."locations stock,"
440 .TB_PREF."stock_master item
441 WHERE move.stock_id = item.stock_id
442 AND stock.loc_code=move.loc_code
443 AND type=".db_escape($type)
444 ." AND trans_no=".db_escape($type_no)
445 ." ORDER BY trans_id";
447 return db_query($sql, "Could not get stock moves");
450 //--------------------------------------------------------------------------------------------------
452 function void_stock_move($type, $type_no)
454 $sql = "SELECT move.*, supplier.supplier_id
455 FROM ".TB_PREF."stock_moves move
456 LEFT JOIN ".TB_PREF."supp_trans credit ON credit.trans_no=move.trans_no AND credit.type=move.type
457 LEFT JOIN ".TB_PREF."grn_batch grn ON grn.id=move.trans_no AND 25=move.type
458 LEFT JOIN ".TB_PREF."suppliers supplier ON IFNULL(grn.supplier_id, credit.supplier_id)=supplier.supplier_id
459 WHERE move.type=".db_escape($type)." AND move.trans_no=".db_escape($type_no);
461 $result = db_query($sql, "Could not void stock moves");
462 while ($row = db_fetch($result))
464 //Skip cost averaging of service items
465 if (is_inventory_item($row["stock_id"]))
467 // The cost has to be adjusted.
468 // Transaction rates are stored either as price or standard_cost depending on types
469 $types = array(ST_SUPPCREDIT, ST_SUPPRECEIVE);
470 if (in_array($type, $types))
471 $unit_cost = $row["price"];
473 $unit_cost = $row["standard_cost"];
475 update_average_material_cost($row["supplier_id"], $row["stock_id"],
476 $unit_cost, -$row["qty"], sql2date($row["tran_date"]));
479 $sql = "DELETE FROM ".TB_PREF."stock_moves
480 WHERE type=".db_escape($type)
481 ." AND trans_no=".db_escape($type_no);
482 db_query($sql, "The stock movement cannot be delated");
485 //--------------------------------------------------------------------------------------------------
487 function get_location_name($loc_code)
489 $sql = "SELECT location_name FROM ".TB_PREF."locations
490 WHERE loc_code=".db_escape($loc_code);
492 $result = db_query($sql, "could not retreive the location name for $loc_code");
494 if (db_num_rows($result) == 1)
496 $row = db_fetch_row($result);
500 display_db_error("could not retreive the location name for $loc_code", $sql, true);
503 function get_mb_flag($stock_id)
505 $sql = "SELECT mb_flag FROM ".TB_PREF."stock_master
506 WHERE stock_id = ".db_escape($stock_id);
507 $result = db_query($sql, "retreive mb_flag from item");
509 if (db_num_rows($result) == 0)
512 $myrow = db_fetch_row($result);