/* Mandy Wu's Website
 * accounting.js: The accounting-related JavaScript subroutines.
 */

/*  Copyright (c) 2007-2018 imacat.
 * 
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

/* Author: imacat <imacat@mail.imacat.idv.tw>
 * First written: 2007-09-26
 */

// setAutoSummary: Automatically supply a summary
function setAutoSummary(subj) {
    var i, j, sum, dateText, today, subjText, subjCode, thisMonth;
    // Get the name prefix of this selection
    i = subj.name.indexOf("subj");
    // Obtain the summary column
    sum = subj.form[subj.name.substr(0, i) + "summary"];
    // Get today's date
    today = new Date;
    dateText = trim(subj.form.date.value);
    if (!isDate(dateText))
        return;
    today.setFullYear(dateText.substr(0, 4));
    today.setMonth(dateText.substr(5, 2) - 1);
    today.setDate(dateText.substr(8, 2));
    thisMonth = today.getMonth() + 1;
    // Obtain the selected subject
    // The value of the selection is S/N but not subject code,
    // so we have to obtain the subject code from the option text
    subjText = subj.options[subj.selectedIndex].text;
    subjCode = parseInt(subjText.substr(0, subjText.indexOf(" ")));
    switch (subjCode) {
    // 62561 和信 0927-02-1680
    case 62561:
        sum.value = "和信" + ((thisMonth + 10) % 12 + 1) + "月";
        break;
    // 21412 應付帳款—玉山信用卡
    case 21412:
        // Only fill in the debit side, as our repay
        if (sum.name.substr(0, 4) == "debt") {
            // 25 or later - assume to be of this month
            if (today.getDate() >= 25) {
                sum.value = "玉山信用卡" + thisMonth + "月";
            // Before 25 - assume to be of previous month
            } else {
                sum.value = "玉山信用卡" + ((thisMonth + 10) % 12 + 1) + "月";
            }
        }
        break;
    // 21413 應付帳款—台新信用卡
    case 21413:
        // Only fill in the debitowing side, as our repay
        if (sum.name.substr(0, 4) == "debt") {
            // 25 or later - assume to be of this month
            if (today.getDate() >= 25) {
                sum.value = "台新信用卡" + thisMonth + "月";
            // Before 25 - assume to be of previous month
            } else {
                sum.value = "台新信用卡" + ((thisMonth + 10) % 12 + 1) + "月";
            }
        }
        break;
    }
    return;
}

// acctRepQueryDisableNoUseRanges: Disable range parameters that are not in use
function acctRepQueryDisableNoUseRanges() {
    var i, form, curValue;
    // Obtain our form
    form = document.forms["acctrepquery"];
    if (form == undefined)
        return;
    // Find the current selection
    for (i = 0; i < form.r.length; i++) {
        if (form["r"][i].checked) {
            curValue = form["r"][i].value;
            break;
        }
    }
    // Disable or enable the month selection
    if (curValue == "m")
        form["m"].disabled = false;
    else
        form["m"].disabled = true;
    // Disable or enable the year selection
    if (curValue == "y")
        form["y"].disabled = false;
    else
        form["y"].disabled = true;
    // Disable or enable the start and end date
    if (curValue == "s") {
        form["f"].disabled = false;
        form["t"].disabled = false;
    } else {
        form["f"].disabled = true;
        form["t"].disabled = true;
    }
    return;
}

// calcTotal: Calculating the total
function calcTotal(amount) {
    var i, j, side, sum, a, pos, isNumber;
    a = "NT$ 3,433.00";
    side = amount.name.substr(0, 4);
    for (   i = 0, sum = 0;
            amount.form[side + i + "amount"] != undefined;
            i++) {
        a = amount.form[side + i + "amount"];
        // Trim the text
        a.value = trim(a.value);
        // Remove the dollar sign
        if (a.value.substr(0, 3) == "NT$")
            a.value = a.value.substr(3);
        // Trim the text again, for possible spaces after the dollar sign
        a.value = trim(a.value);
        // Remove the decimal point
        if (a.value.substr(a.value.length - 3) == ".00")
            a.value = a.value.substr(0, a.value.length - 3);
        // Remove the thousand seperators
        while ((pos = a.value.indexOf(",")) != -1) {
            a.value = a.value.substr(0, pos) + a.value.substr(pos + 1);
        }
        // Check if it is a number
        for (j = 0, isNumber = true; j < a.value.length; j++) {
            if (a.value.charCodeAt(j) < 48 || a.value.charCodeAt(j) > 57) {
                isNumber = false;
                break;
            }
        }
        // Add the amount
        if (isNumber)
            sum = sum + a.value * 1;
    }
    a = amount.form[side + "total"];
    if (a != undefined)
        a.value = sum;
}