path: root/sql/modules/Payment.sql

-- payment_get_open_accounts and the option to get all accounts need to be
-- refactored and redesigned.  -- CT
CREATE OR REPLACE FUNCTION payment_get_open_accounts(in_account_class int) 
returns SETOF entity AS
$$
DECLARE out_entity entity%ROWTYPE;
BEGIN
    FOR out_entity IN
        SELECT ec.id, cp.legal_name as name, e.entity_class, e.created 
        FROM entity e
        JOIN entity_credit_account ec ON (ec.entity_id = e.id)
        JOIN company cp ON (cp.entity_id = e.id)
            WHERE ec.entity_class = in_account_class
              AND CASE WHEN in_account_class = 1 THEN
                e.id IN (SELECT entity_id FROM ap 
                    WHERE amount <> paid
                    GROUP BY entity_id)
                   WHEN in_account_class = 2 THEN
                e.id IN (SELECT entity_id FROM ar
                    WHERE amount <> paid
                    GROUP BY entity_id)
              END
    LOOP
        RETURN NEXT out_entity;
    END LOOP;
END;
$$ LANGUAGE PLPGSQL;

COMMENT ON FUNCTION payment_get_open_accounts(int) IS
$$ This function takes a single argument (1 for vendor, 2 for customer as 
always) and returns all entities with open accounts of the appropriate type. $$;

CREATE OR REPLACE FUNCTION payment_get_all_accounts(in_account_class int) 
RETURNS SETOF entity AS
$$
DECLARE out_entity entity%ROWTYPE;
BEGIN
    FOR out_entity IN
        SELECT  ec.id, 
            e.name, e.entity_class, e.created 
        FROM entity e
        JOIN entity_credit_account ec ON (ec.entity_id = e.id)
                WHERE e.entity_class = in_account_class
    LOOP
        RETURN NEXT out_entity;
    END LOOP;
END;
$$ LANGUAGE PLPGSQL;

COMMENT ON FUNCTION payment_get_open_accounts(int) IS
$$ This function takes a single argument (1 for vendor, 2 for customer as 
always) and returns all entities with accounts of the appropriate type. $$;


CREATE TYPE payment_invoice AS (
    invoice_id int,
    invnumber text,
    invoice_date date,
    amount numeric,
    discount numeric,
    due numeric
);

CREATE OR REPLACE FUNCTION payment_get_open_invoices
(in_account_class int,
 in_entity_credit_id int,
 in_curr char(3),
 in_datefrom date, 
 in_dateto date,
 in_amountfrom numeric,
 in_amountto   numeric,
 in_department_id int)
RETURNS SETOF payment_invoice AS
$$
DECLARE payment_inv payment_invoice;
BEGIN
        FOR payment_inv IN
        SELECT a.id AS invoice_id, a.invnumber, 
               a.transdate AS invoice_date, a.amount, 
               CASE WHEN discount_terms 
                         > extract('days' FROM age(a.transdate))
                    THEN 0
                    ELSE (a.amount - a.paid) * c.discount / 100  
               END AS discount,
               a.amount - a.paid - 
               CASE WHEN discount_terms 
                         > extract('days' FROM age(a.transdate))
                    THEN 0
                    ELSE (a.amount - a.paid) * c.discount / 100  
               END
                AS due
          FROM (SELECT id, invnumber, transdate, amount, entity_id,
                       1 as invoice_class, paid, curr, 
                       entity_credit_account, department_id
                  FROM ap
                         UNION
                SELECT id, invnumber, transdate, amount, entity_id,
                       2 AS invoice_class, paid, curr,
                       entity_credit_account, department_id
                  FROM ar
               ) a
          JOIN entity_credit_account c ON (c.id = a.entity_credit_account
            OR (a.entity_credit_account IS NULL and 
                a.entity_id = c.entity_id))
         WHERE a.invoice_class = in_account_class
               AND c.entity_class = in_account_class
               AND a.amount - a.paid <> 0
               AND a.curr = in_curr
               AND (a.transdate >= in_datefrom 
                    OR in_datefrom IS NULL)
               AND (a.transdate <= in_dateto
                    OR in_dateto IS NULL)
               AND (a.amount >= in_amountfrom 
                    OR in_amountfrom IS NULL)
               AND (a.amount <= in_amountto
                    OR in_amountto IS NULL)
               AND (a.department_id = in_department_id
                    OR in_department_id IS NULL)     
                         
    LOOP
        RETURN NEXT payment_inv;
    END LOOP;
END;
$$ LANGUAGE PLPGSQL;

COMMENT ON FUNCTION payment_get_open_invoices(int, int, char(3), date, date, numeric, numeric, int) IS
$$ This function takes three arguments:
Type: 1 for vendor, 2 for customer
Entity_id:  The entity_id of the customer or vendor
Currency:  3 characters for currency ('USD' for example).
Returns all open invoices for the entity in question. $$;

CREATE TYPE payment_contact_invoice AS (
    contact_id int,
    contact_name text,
    account_number text,
    total_due numeric,
    invoices text[],
        has_vouchers int
);

CREATE OR REPLACE FUNCTION payment_get_all_contact_invoices
(in_account_class int, in_business_id int, in_currency char(3),
    in_date_from date, in_date_to date, in_batch_id int, 
    in_ar_ap_accno text)
RETURNS SETOF payment_contact_invoice AS
$$
DECLARE payment_item payment_contact_invoice;
BEGIN
    FOR payment_item IN
          SELECT c.id AS contact_id, e.name AS contact_name,
                 c.meta_number AS account_number,
                 sum(p.due) AS total_due, 
                 compound_array(ARRAY[[
                      a.id::text, a.invnumber, a.transdate::text, 
                      a.amount::text, (a.amount - p.due)::text,
                      (CASE WHEN c.discount_terms 
                                > extract('days' FROM age(a.transdate))
                           THEN 0
                           ELSE (a.amount - coalesce((a.amount - p.due), 0)) * coalesce(c.discount, 0) / 100
                      END)::text, 
                      (coalesce(p.due, 0) -
                      (CASE WHEN c.discount_terms 
                                > extract('days' FROM age(a.transdate))
                           THEN 0
                           ELSE (coalesce(p.due, 0)) * coalesce(c.discount, 0) / 100
                      END))::text]]),
                              sum(case when v.batch_id = in_batch_id then 1
                          else 0 END),
                      bool_and(lock_record(a.id, (select max(session_id)                FROM "session" where users_id = (
                    select id from users WHERE username =
                    SESSION_USER))))
                           
            FROM entity e
            JOIN entity_credit_account c ON (e.id = c.entity_id)
            JOIN (SELECT id, invnumber, transdate, amount, entity_id, 
                 paid, curr, 1 as invoice_class, 
                         entity_credit_account, on_hold
                    FROM ap
               WHERE in_account_class = 1
                   UNION
                  SELECT id, invnumber, transdate, amount, entity_id,
                         paid, curr, 2 as invoice_class, 
                         entity_credit_account, on_hold
                    FROM ar
               WHERE in_account_class = 2
            ORDER BY transdate
                 ) a ON (a.entity_credit_account = c.id)
            JOIN transactions t ON (a.id = t.id)
            JOIN (SELECT trans_id, 
                         sum(CASE WHEN in_account_class = 1 THEN amount
                                  WHEN in_account_class = 2 
                                  THEN amount * -1
                             END) AS due 
                    FROM acc_trans 
                    JOIN chart ON (chart.id = acc_trans.chart_id)
                   WHERE ((chart.link = 'AP' AND in_account_class = 1)
                         OR (chart.link = 'AR' AND in_account_class = 2))
                GROUP BY trans_id) p ON (a.id = p.trans_id)
          LEFT JOIN voucher v ON (v.trans_id = a.id)
           WHERE v.batch_id = in_batch_id
                  OR (a.invoice_class = in_account_class
             AND c.business_id = 
                coalesce(in_business_id, c.business_id)
                 AND ((a.transdate >= COALESCE(in_date_from, a.transdate)
                       AND a.transdate <= COALESCE(in_date_to, a.transdate)))
                 AND c.entity_class = in_account_class
                 AND a.curr = in_currency
                 AND a.entity_credit_account = c.id
             AND p.due <> 0
                 AND a.amount <> a.paid 
             AND NOT a.on_hold
             AND NOT (t.locked_by IS NOT NULL AND t.locked_by IN 
                (select "session_id" FROM "session"
                WHERE users_id IN 
                    (select id from users 
                    where username <> SESSION_USER)))
                 AND EXISTS (select trans_id FROM acc_trans
                              WHERE trans_id = a.id AND
                                    chart_id = (SELECT id frOM chart
                                                 WHERE accno
                                                       = in_ar_ap_accno)
                            ))
        GROUP BY c.id, e.name, c.meta_number, c.threshold
          HAVING sum(p.due) > c.threshold
            OR sum(case when v.batch_id = in_batch_id then 1
                                  else 0 END) > 0
    LOOP
        RETURN NEXT payment_item;
    END LOOP;
END;
$$ LANGUAGE plpgsql;

COMMENT ON FUNCTION payment_get_all_contact_invoices
(in_account_class int, in_business_type int, in_currency char(3),
        in_date_from date, in_date_to date, in_batch_id int, 
        in_ar_ap_accno text) IS
$$
This function takes the following arguments (all prefaced with in_ in the db):
account_class: 1 for vendor, 2 for customer
business_type: integer of business.id.
currency: char(3) of currency (for example 'USD')
date_from, date_to:  These dates are inclusive.
1;3B
batch_id:  For payment batches, where fees are concerned.
ar_ap_accno:  The AR/AP account number.

This then returns a set of contact information with a 2 dimensional array 
cnsisting of outstanding invoices.
$$;

CREATE OR REPLACE FUNCTION payment_bulk_queue
(in_transactions numeric[], in_batch_id int, in_source text, in_total numeric,
    in_ar_ap_accno text, in_cash_accno text, 
    in_payment_date date, in_account_class int)
returns int as
$$
BEGIN
    INSERT INTO payments_queue
    (transactions, batch_id, source, total, ar_ap_accno, cash_accno,
        payment_date, account_class)
    VALUES 
    (in_transactions, in_batch_id, in_source, in_total, in_ar_ap_accno,
        in_cash_accno, in_payment_date, in_account_class);

    RETURN array_upper(in_transactions, 1) - 
        array_lower(in_transactions, 1);
END;
$$ LANGUAGE PLPGSQL;

CREATE OR REPLACE FUNCTION job__process_payment(in_job_id int)
RETURNS bool AS $$
DECLARE 
    queue_record RECORD;
    t_auth_name text;
    t_counter int;
BEGIN
    -- TODO:  Move the set session authorization into a utility function
    SELECT entered_by INTO t_auth_name FROM pending_job
    WHERE id = in_job_id;

    EXECUTE 'SET SESSION AUTHORIZATION ' || quote_ident(t_auth_name);

    t_counter := 0;
    
    FOR queue_record IN 
        SELECT * 
        FROM payments_queue WHERE job_id = in_job_id
    LOOP
        PERFORM payment_bulk_post
            (queue_record.transactions, queue_record.batch_id, 
                queue_record.source, queue_record.total, 
                queue_record.ar_ap_accno, 
                queue_record.cash_accno, 
                queue_record.payment_date, 
                queue_record.account_class);

        t_counter := t_counter + 1;
        RAISE NOTICE 'Processed record %, starting transaction %', 
            t_counter, queue_record.transactions[1][1];
    END LOOP;   
    DELETE FROM payments_queue WHERE job_id = in_job_id;

    UPDATE pending_job
    SET completed_at = timeofday()::timestamp,
        success = true
    WHERE id = in_job_id;
    RETURN TRUE;
END;
$$ language plpgsql;

CREATE OR REPLACE FUNCTION job__create(in_batch_class int, in_batch_id int)
RETURNS int AS
$$
BEGIN
    INSERT INTO pending_job (batch_class, batch_id)
    VALUES (coalesce(in_batch_class, 3), in_batch_id);

    RETURN currval('pending_job_id_seq');
END;
$$ LANGUAGE PLPGSQL;

CREATE TYPE job__status AS (
    completed int, -- 1 for completed, 0 for no
    success int, -- 1 for success, 0 for no
    completed_at timestamp,
    error_condition text -- error if not successful
);

CREATE OR REPLACE FUNCTION job__status(in_job_id int) RETURNS job__status AS
$$
DECLARE out_row job__status;
BEGIN
    SELECT  (completed_at IS NULL)::INT, success::int, completed_at,
        error_condition
    INTO out_row 
    FROM pending_job
    WHERE id = in_job_id;

    RETURN out_row;
END;
$$ language plpgsql;

CREATE OR REPLACE FUNCTION payment_bulk_post
(in_transactions numeric[], in_batch_id int, in_source text, in_total numeric,
    in_ar_ap_accno text, in_cash_accno text, 
    in_payment_date date, in_account_class int)
RETURNS int AS
$$
DECLARE 
    out_count int;
    t_voucher_id int;
    t_trans_id int;
    t_amount numeric;
        t_ar_ap_id int;
    t_cash_id int;
BEGIN
    IF in_batch_id IS NULL THEN
        -- t_voucher_id := NULL;
        RAISE EXCEPTION 'Bulk Post Must be from Batch!';
    ELSE
        INSERT INTO voucher (batch_id, batch_class, trans_id)
        values (in_batch_id, 3, in_transactions[1][1]);

        t_voucher_id := currval('voucher_id_seq');
    END IF;

    select id into t_ar_ap_id from chart where accno = in_ar_ap_accno;
    select id into t_cash_id from chart where accno = in_cash_accno;

    FOR out_count IN 
            array_lower(in_transactions, 1) ..
            array_upper(in_transactions, 1)
    LOOP
        INSERT INTO acc_trans 
            (trans_id, chart_id, amount, approved, voucher_id,
            transdate, source)
        VALUES
            (in_transactions[out_count][1], 
                case when in_account_class = 1 THEN t_cash_id
                WHEN in_account_class = 2 THEN t_ar_ap_id
                ELSE -1 END,

                in_transactions[out_count][2],
    
                CASE WHEN t_voucher_id IS NULL THEN true
                ELSE false END,
                t_voucher_id, in_payment_date, in_source),

            (in_transactions[out_count][1], 
                case when in_account_class = 1 THEN t_ar_ap_id
                WHEN in_account_class = 2 THEN t_cash_id
                ELSE -1 END,

                in_transactions[out_count][2]* -1,

                CASE WHEN t_voucher_id IS NULL THEN true
                ELSE false END,
                t_voucher_id, in_payment_date, in_source);
        UPDATE ap 
        set paid = paid +in_transactions[out_count][2]
        where id =in_transactions[out_count][1];
    END LOOP;
    return out_count;
END;
$$ language plpgsql;

COMMENT ON FUNCTION payment_bulk_post
(in_transactions numeric[], in_batch_id int, in_source text, in_total numeric,
        in_ar_ap_accno text, in_cash_accno text, 
        in_payment_date date, in_account_class int)
IS
$$ Note that in_transactions is a two-dimensional numeric array.  Of each 
sub-array, the first element is the (integer) transaction id, and the second
is the amount for that transaction.  If the total of the amounts do not add up 
to in_total, then an error is generated. $$;


CREATE OR REPLACE FUNCTION payment_post 
(in_payment_date   date,
 in_account_class  int,
 in_person_id      int,
 in_currency       char(3),
 in_notes          text,
 in_department     int,
 in_gl_description text,
 in_cash_accno     int[],
 in_cash_amount    int[],
 in_cash_approved  bool[],
 in_cash_source    text[],
 in_accno          int[],
 in_amount         int[],
 in_approved       bool[],
 in_source         text[],
 in_transaction_id int[],
 in_type           int[],
 in_approved bool)
RETURNS INT AS
$$
DECLARE var_payment_id int;
DECLARE var_gl_id int;
DECLARE var_entry_id int[];
DECLARE out_count int;

BEGIN
        -- FIRST WE HAVE TO INSERT THE PAYMENT
        -- THE ID IS GENERATED BY payment_id_seq
        --
    INSERT INTO payment (reference, payment_class, payment_date,
                          person_id, currency, notes, department_id) 
    VALUES ((CASE WHEN in_account_class = 1 THEN
                                    setting_increment('rcptnumber') -- I FOUND THIS ON sql/modules/Settings.sql 
                         ELSE                       -- and it is very usefull               
                            setting_increment('paynumber') 
                         END),
             in_account_class, in_payment_date, in_person_id,
                 in_currency, in_notes, in_department);
        SELECT currval('payment_id_seq') INTO var_payment_id; -- WE'LL NEED THIS VALUE TO USE payment_link table
        -- SECOND WE HAVE TO MAKE THE GL TO HOLD THE TRANSACTIONS
        -- THE ID IS GENERATED BY gl_id_seq
        --
        INSERT INTO gl (reference, description, transdate,
                          person_id, notes, approved, department_id) 
    VALUES (setting_increment('glnumber'),
             in_gl_description, in_payment_date, in_person_id,
                 in_notes, in_department, coalesce(in_approved, true));
        SELECT currval('id') INTO var_gl_id; -- WE'LL NEED THIS VALUE TO JOIN WITH PAYMENT
        -- NOW COMES THE HEAVY PART, STORING ALL THE POSSIBLE TRANSACTIONS... 
        --
        -- FIRST WE SHOULD INSERT THE CASH ACCOUNTS
        --
        -- WE SHOULD HAVE THE DATA STORED AS (ACCNO, AMOUNT), SO
    FOR out_count IN 
            array_lower(in_cash_accno, 1) ..
            array_upper(in_cash_accno, 1)
    LOOP
            INSERT INTO acc_trans (chart_id, amount,
                               trans_id, transdate, approved, source)
        VALUES ((SELECT id FROM chart WHERE accno = in_cash_accno[out_count]), 
                CASE WHEN in_account_class = 2 THEN in_cash_amount[out_count] * -1 
                ELSE in_cash_amount[out_count]
                END,
                var_gl_id, in_payment_date, coalesce(in_cash_approved[1], true), 
                in_cash_source[out_count]);
                --SELECT currval('acc_trans_entry_id_seq') INTO var_entry_id[out_count];--WE'LL NEED THIS FOR THE PAYMENT_LINK
    END LOOP;
    --
    -- NOW LETS HANDLE THE AR/AP/OVERPAYMENT ACCOUNT
    --
    FOR var_count IN
             array_lower(in_accno, 1) ..
             array_upper(in_accno, 1)
    LOOP
            INSERT INTO acc_trans (chart_id, amount,
                               trans_id, transdate, approved, source)
        VALUES ((SELECT id FROM chart WHERE accno = in_accno[out_count]), 
                CASE WHEN in_account_class = 2 THEN in_amount[out_count] * -1 
                ELSE in_amount[out_count]
                END,
                var_gl_id, in_payment_date, coalesce(in_approved[1], true), 
                in_source[out_count]);
    -- 
    -- WE WILL INSERT THE LINK INTO PAYMENT_LINKS NOW
    --          
        INSERT INTO payment_links 
        VALUES (var_payment_id, currval(acc_trans_entry_id_seq),
                                          in_transaction_id[out_count], in_type[var_count]);
    END LOOP;
       return 0;
END;
$$ LANGUAGE PLPGSQL;
-- I HAVE TO MAKE A COMMENT ON THIS FUNCTION
-- Move this to the projects module when we start on that. CT
CREATE OR REPLACE FUNCTION project_list_open(in_date date) 
RETURNS SETOF project AS
$$
DECLARE out_project project%ROWTYPE;
BEGIN
    FOR out_project IN
        SELECT * from project
        WHERE startdate <= in_date AND enddate >= in_date
              AND completed = 0
    LOOP
        return next out_project;
    END LOOP;
END;
$$ language plpgsql;

comment on function project_list_open(in_date date) is
$$ This function returns all projects that were open as on the date provided as
the argument.$$;
-- Move this to the projects module when we start on that. CT


CREATE OR REPLACE FUNCTION department_list(in_role char)
RETURNS SETOF department AS
$$
DECLARE out_department department%ROWTYPE;
BEGIN
       FOR out_department IN
               SELECT * from department
               WHERE role = coalesce(in_role, role)
       LOOP
               return next out_department;
       END LOOP;
END;
$$ language plpgsql;
-- Move this into another module.

comment on function department_list(in_role char) is
$$ This function returns all department that match the role provided as
the argument.$$;

CREATE OR REPLACE FUNCTION payments_get_open_currencies(in_account_class int)
RETURNS SETOF char(3) AS
$$
DECLARE resultrow record;
BEGIN
        FOR resultrow IN
          SELECT curr AS curr FROM ar
          WHERE amount <> paid
          OR paid IS NULL
          AND in_account_class=2 
          UNION
          SELECT curr FROM ap
          WHERE amount <> paid
          OR paid IS NULL
          AND in_account_class=1
          ORDER BY curr
          LOOP
         return next resultrow.curr;
        END LOOP;
END;
$$ language plpgsql;

CREATE OR REPLACE FUNCTION currency_get_exchangerate(in_currency char(3), in_date date, in_account_class int) 
RETURNS NUMERIC AS
$$
DECLARE 
    out_exrate exchangerate.buy%TYPE;

    BEGIN 
        IF in_account_class = 1 THEN
          SELECT INTO out_exrate buy 
          FROM exchangerate
          WHERE transdate = in_date AND curr = in_currency;
        ELSE 
          SELECT INTO out_exrate sell 
          FROM exchangerate
          WHERE transdate = in_date AND curr = in_currency;   
        END IF;
        RETURN out_exrate;
    END;
$$ language plpgsql;                                                                  
COMMENT ON FUNCTION currency_get_exchangerate(in_currency char(3), in_date date, in_account_class int) IS
$$ This function return the exchange rate of a given currency, date and exchange rate class (buy or sell). $$;

--
--  payment_location_result has the same arch as location_result, except for one field 
--  This should be unified on the API when we get things working - David Mora
--
CREATE TYPE payment_location_result AS (
        id int,
        line_one text,
        line_two text,
        line_three text,
        city text,
        state text,
    mail_code text
        country text,
        class text
);


--
--  payment_get_vc_info has the same arch as company__list_locations, except for the filtering capabilities 
--  This should be unified on the API when we get things working - David Mora
--
CREATE OR REPLACE FUNCTION payment_get_vc_info(in_entity_id int, in_location_class_id int)
RETURNS SETOF payment_location_result AS
$$
DECLARE out_row RECORD;
    BEGIN
        FOR out_row IN
                SELECT l.id, l.line_one, l.line_two, l.line_three, l.city,
                       l.state, l.mail_code, c.name, lc.class
                FROM location l
                JOIN company_to_location ctl ON (ctl.location_id = l.id)
                JOIN company cp ON (ctl.company_id = cp.id)
                JOIN location_class lc ON (ctl.location_class = lc.id)
                JOIN country c ON (c.id = l.country_id)
                WHERE cp.entity_id = in_entity_id AND
                      lc.id = in_location_class_id
                ORDER BY lc.id, l.id, c.name
                LOOP
                    RETURN NEXT out_row;
        END LOOP;
    END;
$$ LANGUAGE PLPGSQL;

COMMENT ON FUNCTION payment_get_vc_info(in_entity_id int, in_location_class_id int) IS
$$ This function returns vendor or customer info $$;

CREATE TYPE payment_record AS (
    amount numeric,
    meta_number text,
        credit_id int,
    company_paid text,
    accounts text[],
        source text,
        date_paid date
);

CREATE OR REPLACE FUNCTION payment__search 
(in_source text, in_date_from date, in_date_to date, in_credit_id int, 
    in_cash_accno text, in_account_class int)
RETURNS SETOF payment_record AS
$$
DECLARE 
    out_row payment_record;
BEGIN
    FOR out_row IN 
        select sum(CASE WHEN c.entity_class = 1 then a.amount
                ELSE a.amount * -1 END), c.meta_number, 
            c.id, co.legal_name,
            compound_array(ARRAY[ARRAY[ch.id::text, ch.accno, 
                ch.description]]), a.source, a.transdate
        FROM entity_credit_account c
        JOIN ( select entity_credit_account, id
            FROM ar WHERE in_account_class = 2
            UNION
            SELECT entity_credit_account, id
            FROM ap WHERE in_account_class = 1
            ) arap ON (arap.entity_credit_account = c.id)
        JOIN acc_trans a ON (arap.id = a.trans_id)
        JOIN chart ch ON (ch.id = a.chart_id)
        JOIN company co ON (c.entity_id = co.entity_id)
        WHERE (ch.accno = in_cash_accno)
            AND (c.id = in_credit_id OR in_credit_id IS NULL)
            AND (a.transdate >= in_date_from 
                OR in_date_from IS NULL)
            AND (a.transdate <= in_date_to OR in_date_to IS NULL)
            AND (source = in_source OR in_source IS NULL)
        GROUP BY c.meta_number, c.id, co.legal_name, a.transdate, 
            a.source
        ORDER BY a.transdate, c.meta_number, a.source
    LOOP
        RETURN NEXT out_row;
    END LOOP;
END;
$$ language plpgsql;

CREATE OR REPLACE FUNCTION payment__reverse
(in_source text, in_date_paid date, in_credit_id int, in_cash_accno text, 
    in_date_reversed date, in_account_class int, in_batch_id int)
RETURNS INT 
AS $$
DECLARE
    pay_row record;
        t_voucher_id int;
        t_voucher_inserted bool;
BEGIN
        IF in_batch_id IS NOT NULL THEN
        t_voucher_id := nextval('voucher_id_seq');
        t_voucher_inserted := FALSE;
    END IF;
    FOR pay_row IN 
        SELECT a.*, c.ar_ap_account_id
        FROM acc_trans a
        JOIN (select id, entity_credit_account 
            FROM ar WHERE in_account_class = 2
            UNION
            SELECT id, entity_credit_account
            FROM ap WHERE in_account_class = 1
        ) arap ON (a.trans_id = arap.id)
        JOIN entity_credit_account c 
            ON (arap.entity_credit_account = c.id)
        JOIN chart ch ON (a.chart_id = ch.id)
        WHERE coalesce(source, '') = coalesce(in_source, '')
            AND transdate = in_date_paid
            AND in_credit_id = c.id
            AND in_cash_accno = ch.accno
    LOOP
        IF in_batch_id IS NOT NULL 
            AND t_voucher_inserted IS NOT TRUE
        THEN
            INSERT INTO voucher 
            (id, trans_id, batch_id, batch_class)
            VALUES
            (t_voucher_id, pay_row.trans_id, in_batch_id,
                CASE WHEN in_account_class = 1 THEN 4
                     WHEN in_account_class = 2 THEN 7
                END);

            t_voucher_inserted := TRUE;
        END IF;

        INSERT INTO acc_trans
        (trans_id, chart_id, amount, transdate, source, memo, approved,
            voucher_id) 
        VALUES 
        (pay_row.trans_id, pay_row.chart_id, pay_row.amount * -1, 
            in_date_reversed, in_source, 'Reversing ' || 
            COALESCE(in_source, ''), 
            case when in_batch_id is not null then false 
            else true end, t_voucher_id),
        (pay_row.trans_id, pay_row.ar_ap_account_id, pay_row.amount,
            in_date_reversed, in_source, 'Reversing ' ||
            COALESCE(in_source, ''), 
            case when in_batch_id is not null then false 
            else true end, t_voucher_id);
        IF in_account_class = 1 THEN
            UPDATE ap SET paid = amount - 
                (SELECT sum(a.amount) 
                FROM acc_trans a
                JOIN chart c ON (a.chart_id = c.id)
                WHERE c.link = 'AP'
                    AND trans_id = pay_row.trans_id
                ) 
            WHERE id = pay_row.trans_id;
        ELSIF in_account_class = 2 THEN
            update ar SET paid = amount - 
                (SELECT sum(a.amount) 
                FROM acc_trans a
                JOIN chart c ON (a.chart_id = c.id)
                WHERE c.link = 'AR'
                    AND trans_id = pay_row.trans_id
                ) * -1
            WHERE id = pay_row.trans_id;
        ELSE
            RAISE EXCEPTION 'Unknown account class for payments %',
                in_account_class;
        END IF;
    END LOOP;
    RETURN 1;
END;
$$ LANGUAGE PLPGSQL;