/* eslint-disable func-names */
/* *************************************************************************************
* copyright: Copyright (c) 2021 Lowell D. Thomas, all rights reserved
* license: BSD-2-Clause (https://opensource.org/licenses/BSD-2-Clause)
* ********************************************************************************* */This module demonstrates how to control the output of the parser’s tracing facility.
(See the apg-lib trace.js documentation for a lengthy discussion of tracing.
Here we will just concentrate on how to filter the trace records.
This module is the basic parser set up.
module.exports = function setup(trace, phoneNumber, nameArg) {
let name = nameArg;
const thisFileName = 'setup.js: ';
const nodeUtil = require('node:util');
const inspectOptions = {
showHidden: true,
depth: null,
};
try {
const { apgLib } = require('apg-js');
const writeHtml = require('../writeHtml');eslint-disable-next-line new-cap
const parser = new apgLib.parser();
const grammar = new (require('./fancy-number'))();
const id = apgLib.ids;The u_office(), hand-written UDT.
parser.callbacks.u_office = function (result, chars, phraseIndex) {
let matchFound = false;
const TRUE = true;
while (TRUE) {
if (chars + phraseIndex + 3 <= chars.length) {
/* not three digits left in the string */
break;
}
const dig1 = chars[phraseIndex];
const dig2 = chars[phraseIndex + 1];
const dig3 = chars[phraseIndex + 2];
if (dig1 < 50 || dig1 > 57) {
/* first digit must be in range 2-9 */
break;
}
if (dig2 < 48 || dig2 > 57 || dig3 < 48 || dig3 > 57) {
/* second & third digits must be in range 0-9 */
break;
}
if (dig2 === 49 && dig3 === 49) {
/* if the second digit is "1" then the third digit cannot also be "1" */
throw new Error('UDT u_office: digits 2 and 3 cannot both be 1');
}
matchFound = true;
break;
}
if (matchFound === true) {
result.state = id.MATCH;
result.phraseLength = 3;
} else {
result.state = id.NOMATCH;
result.phraseLength = 0;
}
};
let inputCharacterCodes;
if (typeof trace === 'object' && trace.traceObject === 'traceObject') {
parser.trace = trace;
} else {
throw new Error(`${thisFileName}valid trace object required`);
}
if (typeof phoneNumber === 'string') {
inputCharacterCodes = apgLib.utils.stringToChars(phoneNumber);
} else if (Array.isArray(phoneNumber) && typeof (phoneNumber[0] === 'number')) {
inputCharacterCodes = phoneNumber;
} else {
throw new Error(`${thisFileName}input phoneNumber must be string or array of integers`);
}
if (typeof name !== 'string') {
name = 'default';
}
const result = parser.parse(grammar, 0, inputCharacterCodes);
console.log();
console.log('parser input:');
console.log(phoneNumber);
console.log();
console.log('parser results');
console.dir(result, inspectOptions);
let html;Display the trace in ASCII format.
html = parser.trace.toHtml('ascii', 'ASCII display');Display the trace in hexidecimal format.
html += parser.trace.toHtml('hex', 'hexidecimal display');Display the trace in decimal format.
html += parser.trace.toHtml('dec', 'decimal display');Display the trace in unicode format.
html += parser.trace.toHtml('uni', 'UNICODE display');
html = apgLib.utils.htmlToPage(html, name);
writeHtml(html, name);
} catch (e) {
let msg = '\nEXCEPTION THROWN:\n';
if (e instanceof Error) {
msg += `${e.name}: ${e.message}`;
} else if (typeof e === 'string') {
msg += e;
} else {
msg += nodeUtil.inspect(e, inspectOptions);
}
console.log(msg);
throw e;
}
};