@sap/xsodata/lib/utils/typeConverters/converterTools.js

Expose data from a HANA database as OData V2 service with help of .xsodata files.

'use strict';

var Big = require("big.js");

var timeRegexObj = /^P((\d+)Y)?((\d+)M)?((\d+)D)?T((\d+)H)?((\d+)M)?((\d+)(?:\.(\d*))?S)?$/i;
var timeRegexObjTime = /^time'P((\d+)Y)?((\d+)M)?((\d+)D)?T((\d+)H)?((\d+)M)?((\d+)(?:\.(\d*))?S)?'$/i;
var Type_Error = require('./../errors/typeError');

function padZero(string, len) {
    if (string.length < len) {
        return new Array(len - string.length + 1).join('0') + string;
    }
    return string;
}

exports.checkEdmTime = function (value, dbDataType, withTimePrefix, YMDmustBeZero, allowFractions, getYMD) {
    let matches = null;
    if (withTimePrefix === true) {
        matches = timeRegexObjTime.exec(value);
    } else {
        matches = timeRegexObj.exec(value);
    }

    if (!allowFractions) {
        if (matches[13] && Number.parseInt(matches[13]) !== 0) {
            throw new Type_Error(`Fractional part for OData type Edm.Time not supported`);
        }
    }


    if (YMDmustBeZero) {
        if (matches[1] && Number.parseInt(matches[1]) !== 0) {
            throw new Type_Error(`value must be compatible to hana type ${dbDataType} (check year)`);
        }
        if (matches[3] && Number.parseInt(matches[3]) !== 0) {
            throw new Type_Error(`value must be compatible to hana type ${dbDataType} (check month)`);
        }
        if (matches[5] && Number.parseInt(matches[5]) !== 0) {
            throw new Type_Error(`value must be compatible to hana type ${dbDataType} (check day)`);
        }
    }

    if (getYMD === false) {
        let timeParts = [];
        timeParts[0] = (matches[7 + 1]) ? padZero(matches[7 + 1], 2) : '00';
        timeParts[1] = (matches[7 + 3]) ? padZero(matches[7 + 3], 2) : '00';
        timeParts[2] = (matches[7 + 5]) ? padZero(matches[7 + 5], 2) : '00';
        return timeParts.join(':');
    } else {
        // SECONDTIME
        // for range see https://help.sap.com/viewer/4fe29514fd584807ac9f2a04f6754767/2.0.03/en-US/3f81ccc7e35d44cbbc595c7d552c202a.html
        // minimal value is 0001-01-01 00:00:01
        if (!matches[2] || Number.parseInt(matches[2]) <= 0) {
            throw new Type_Error('value must be compatible to hana type SECONDTIME (check year)');
        }
        if (!matches[4] || Number.parseInt(matches[4]) <= 0) {
            throw new Type_Error('value must be compatible to hana type SECONDTIME (check month)');
        }
        if (!matches[6] || Number.parseInt(matches[6]) <= 0) {
            throw new Type_Error('value must be compatible to hana type SECONDTIME (check day)');
        }

        let dateParts = [];
        dateParts[0] = (matches[2]) ? padZero(matches[2], 4) : '00';
        dateParts[1] = (matches[4]) ? padZero(matches[4], 2) : '00';
        dateParts[2] = (matches[6]) ? padZero(matches[6], 2) : '00';

        let timeParts = [];
        timeParts[0] = (matches[7 + 1]) ? padZero(matches[7 + 1], 2) : '00';
        timeParts[1] = (matches[7 + 3]) ? padZero(matches[7 + 3], 2) : '00';
        timeParts[2] = (matches[7 + 5]) ? padZero(matches[7 + 5], 2) : '00';

        return dateParts.join('-') + ' ' + timeParts.join(':');
    }


};

exports.datetime7 = function (dbValue, addLetterTbehindDate) {
    let parts = dbValue.split('.');
    let dateAndTime = parts[0];
    let frac = parts[1];

    if (addLetterTbehindDate && dateAndTime.indexOf('T') === -1) {
        const dtPart = dateAndTime.split(' ');
        dateAndTime = dtPart.join('T');
    }

    if (parts.length === 1) {
        return '' + dateAndTime + '.0000000';
    } else {
        while (frac.length < 7) {
            frac += '0';
        }

        /*
        hdb db driver returned only 3 digits
        if (frac.length > 7 && frac.substring(7) !== '00') {
            throw new Error('Fractional value can not be converted');
        }
        */
        frac = frac.substr(0, 7);
        return '' + dateAndTime + '.' + frac;
    }
};

/**
 * Converts the input <code>decimalString</code> into the decimal notation, if it is specified in the exponential
 * notation.
 * @param {string} decimalString - string representing a decimal value.
 * @returns {string} decimal value in the decimal notation.
 */
exports.formatDecimal = function formatDecimal(decimalString) {
    var decimalValue;

    if (!decimalString) {
        return decimalString;
    }

    if (decimalString.indexOf("e") !== -1 || decimalString.indexOf("E") !== -1) {
        decimalValue = new Big(decimalString);
        return decimalValue.toFixed();
    }

    return decimalString;
};

exports.decimal_db_to_uri = function (decimalAsString) {
    var arr = decimalAsString.split(/[eE]/);
    if (arr.length === 1) {
        // input was "3"
        return decimalAsString;
    }

    if (arr[1] === '') {
        // input was"3e"
        return decimalAsString.substr(0, decimalAsString.length - 1);
    }

    var man = arr[0];
    var exp = arr[1];

    var sign = '';
    if (man[0] === '+' || man[0] === '-') {
        sign = man[0];
        man = man.substr(1);
    }

    var point = man.indexOf('.');
    if (point === -1) {
        point = man.length;
    }

    var expInt = parseInt(exp);
    var out = sign;


    //move comma left
    var pre = 0;
    while (pre < point && man[pre] !== '0') {
        pre++;
    }
    var post = (man.length === point) ? 0 : man.length - point - 1;
    var spre = man.substr(point - pre, pre);
    var spost = man.substr(point + 1, post);
    //return spost;
    //    out = '(' + pre + '     ' + post + ')';
    if (expInt === 0) {
        out += (pre === 0) ? '0' : spre;
        if (post !== 0) {
            out += '.';
            out += spost;
        }
        return out;
    }

    //var pn = point + expInt;
    //return pn;
    if (expInt > 0) {

        out += spre;

        if (post) {
            if (expInt >= post) {
                out += spost;
                expInt -= post;
            } else {
                out += spost.substr(0, expInt);
                out += '.';
                out += spost.substr(expInt);
                return out;
            }
        }
        while (expInt > 0) {
            out += '0';
            expInt--;
        }
        return out;
    } else {
        expInt *= -1;
        if (pre - expInt <= 0) {
            out += '0.';
            while (expInt > pre) {
                out += '0';
                expInt--;
            }
            out += spre;
            out += spost;
        } else {
            out += spre.substr(0, pre - expInt);
            out += '.';
            out += spre.substr(pre - expInt);
        }

        /*
        if (pre) {
            if (expInt <= pre) {
                out += spre;
                expInt -= pre;
            } else {
                out +=
            }
        }*/
        return out;
    }
};


/*TODO future: Add automatic tests for this */
/*
print('1');
print('1.5');
print('123.5');
print('123.56');
print('123.567');
print('123.567e');
print('123.567e-5');
print('123.567e-4');
print('123.567e-3');
print('123.567e-2');
print('123.567e-1');
print('123.567e-0');
print('123.567e0');
print('123.567e1');
print('123.567e2');
print('123.567e3');
print('123.567e4');
print('123.567e5');
print('123.567e+0');
print('123.567e+1');
print('123.567e+2');
print('123.567e+3');
print('123.567e+4');
print('123.567e+5');
print('123e-5');
print('123e-4');
print('123e-3');
print('123e-2');
print('123e-1');
print('123e-0');
print('123e0');
print('123e1');
print('123e2');
print('123e3');
print('123e4');
print('123e5');
print('123e+0');
print('123e+1');
print('123e+2');
print('123e+3');
print('123e+4');
print('123e+5');
print('0.1e-5');
print('0.1e-4');
print('0.1e-3');
print('0.1e-2');
print('0.1e-1');
print('0.1e-0');
print('0.1e0');
print('0.1e1');
print('0.1e2');
print('0.1e3');
print('0.1e4');
print('0.1e5');
print('0.1e+0');
print('0.1e+1');
print('0.1e+2');
print('0.1e+3');
print('0.1e+4');
print('0.1e+5');
print('.1e-5');
print('.1e-4');
print('.1e-3');
print('.1e-2');
print('.1e-1');
print('.1e-0');
print('.1e0');
print('.1e1');
print('.1e2');
print('.1e3');
print('.1e4');
print('.1e5');
print('.1e+0');
print('.1e+1');
print('.1e+2');
print('.1e+3');
print('.1e+4');
print('.1e+5');
print('1.e-5');
print('1.e-4');
print('1.e-3');
print('1.e-2');
print('1.e-1');
print('1.e-0');
print('1.e0');
print('1.e1');
print('1.e2');
print('1.e3');
print('1.e4');
print('1.e5');
print('1.e-0');
print('1.e-1');
print('1.e-2');
print('1.e-3');
print('1.e-4');
print('1.e-5');

print('-1');
print('-1.5');
print('-123.5');
print('-123.56');
print('-123.567');
print('-123.567e');
print('-123.567e-5');
print('-123.567e-4');
print('-123.567e-3');
print('-123.567e-2');
print('-123.567e-1');
print('-123.567e-0');
print('-123.567e0');
print('-123.567e1');
print('-123.567e2');
print('-123.567e3');
print('-123.567e4');
print('-123.567e5');
print('-123.567e+0');
print('-123.567e+1');
print('-123.567e+2');
print('-123.567e+3');
print('-123.567e+4');
print('-123.567e+5');
print('-123e-5');
print('-123e-4');
print('-123e-3');
print('-123e-2');
print('-123e-1');
print('-123e-0');
print('-123e0');
print('-123e1');
print('-123e2');
print('-123e3');
print('-123e4');
print('-123e5');
print('-123e+0');
print('-123e+1');
print('-123e+2');
print('-123e+3');
print('-123e+4');
print('-123e+5');
print('-0.1e-5');
print('-0.1e-4');
print('-0.1e-3');
print('-0.1e-2');
print('-0.1e-1');
print('-0.1e-0');
print('-0.1e0');
print('-0.1e1');
print('-0.1e2');
print('-0.1e3');
print('-0.1e4');
print('-0.1e5');
print('-0.1e+0');
print('-0.1e+1');
print('-0.1e+2');
print('-0.1e+3');
print('-0.1e+4');
print('-0.1e+5');
print('-.1e-5');
print('-.1e-4');
print('-.1e-3');
print('-.1e-2');
print('-.1e-1');
print('-.1e-0');
print('-.1e0');
print('-.1e1');
print('-.1e2');
print('-.1e3');
print('-.1e4');
print('-.1e5');
print('-.1e+0');
print('-.1e+1');
print('-.1e+2');
print('-.1e+3');
print('-.1e+4');
print('-.1e+5');
print('-1.e-5');
print('-1.e-4');
print('-1.e-3');
print('-1.e-2');
print('-1.e-1');
print('-1.e-0');
print('-1.e0');
print('-1.e1');
print('-1.e2');
print('-1.e3');
print('-1.e4');
print('-1.e5');
print('-1.e+0');
print('-1.e+1');
print('-1.e+2');
print('-1.e+3');
print('-1.e+4');
print('-1.e+5');
print('+1');
print('+1.5');
print('+123.5');
print('+123.56');
print('+123.567');
print('+123.567e');
print('+123.567e-5');
print('+123.567e-4');
print('+123.567e-3');
print('+123.567e-2');
print('+123.567e-1');
print('+123.567e-0');
print('+123.567e0');
print('+123.567e1');
print('+123.567e2');
print('+123.567e3');
print('+123.567e4');
print('+123.567e5');
print('+123.567e+0');
print('+123.567e+1');
print('+123.567e+2');
print('+123.567e+3');
print('+123.567e+4');
print('+123.567e+5');
print('+123e-5');
print('+123e-4');
print('+123e-3');
print('+123e-2');
print('+123e-1');
print('+123e-0');
print('+123e0');
print('+123e1');
print('+123e2');
print('+123e3');
print('+123e4');
print('+123e5');
print('+123e+0');
print('+123e+1');
print('+123e+2');
print('+123e+3');
print('+123e+4');
print('+123e+5');
print('+0.1e-5');
print('+0.1e-4');
print('+0.1e-3');
print('+0.1e-2');
print('+0.1e-1');
print('+0.1e-0');
print('+0.1e0');
print('+0.1e1');
print('+0.1e2');
print('+0.1e3');
print('+0.1e4');
print('+0.1e5');
print('+0.1e+0');
print('+0.1e+1');
print('+0.1e+2');
print('+0.1e+3');
print('+0.1e+4');
print('+0.1e+5');
print('+.1e-5');
print('+.1e-4');
print('+.1e-3');
print('+.1e-2');
print('+.1e-1');
print('+.1e-0');
print('+.1e0');
print('+.1e1');
print('+.1e2');
print('+.1e3');
print('+.1e4');
print('+.1e5');
print('+.1e+0');
print('+.1e+1');
print('+.1e+2');
print('+.1e+3');
print('+.1e+4');
print('+.1e+5');
print('+1.e-5');
print('+1.e-4');
print('+1.e-3');
print('+1.e-2');
print('+1.e-1');
print('+1.e-0');
print('+1.e0');
print('+1.e1');
print('+1.e2');
print('+1.e3');
print('+1.e4');
print('+1.e5');
print('+1.e+0');
print('+1.e+1');
print('+1.e+2');
print('+1.e+3');
print('+1.e+4');
print('+1.e+5');*/