// ==UserScript== // @name Taxi estimator for google maps // @namespace http://jeffpalm.com/gtaxi // @description Shows an estimated taxi price for a route in NYC // @include http://*maps.google.com/* // ==/UserScript== /* * Copyright 2007 Jeffrey Palm. */ var VERSION = 0.1; // -------------------------------------------------- // misc // -------------------------------------------------- function $n(tag,on) { var e = document.createElement(tag); if (on) on.appendChild(e); return e; } function $t(text,on) { var e = document.createTextNode(text); if (on) on.appendChild(e); return e; } /** * http://lists.xml.org/archives/xml-dev/200201/msg00873.html */ function insertBefore(newNode,target) { var parent = target.parentNode; var refChild = target; if(refChild) parent.insertBefore(newNode, refChild); else parent.appendChild(newNode); } /* * * This script and many more are available free online at The * JavaScript Source :: http://javascript.internet.com Created by: * Public Domain */ function insertAfter(node, referenceNode) { parent = node.parentNode; if (referenceNode.nextSibling) { parent.insertBefore(node, referenceNode.nextSibling); } else { parent.appendChild(node); } } /** * JavaScript printf/sprintf functions. * * This code is unrestricted: you are free to use it however you like. * * The functions should work as expected, performing left or right alignment, * truncating strings, outputting numbers with a required precision etc. * * For complex cases, these functions follow the Perl implementations of * (s)printf, allowing arguments to be passed out-of-order, and to set the * precision or length of the output based on arguments instead of fixed * numbers. * * See http://perldoc.perl.org/functions/sprintf.html for more information. * * Implemented: * - zero and space-padding * - right and left-alignment, * - base X prefix (binary, octal and hex) * - positive number prefix * - (minimum) width * - precision / truncation / maximum width * - out of order arguments * * Not implemented (yet): * - vector flag * - size (bytes, words, long-words etc.) * * Will not implement: * - %n or %p (no pass-by-reference in JavaScript) * * @version 2007.04.27 * @author Ash Searle */ function sprintf() { function pad(str, len, chr, leftJustify) { var padding = (str.length >= len) ? '' : Array(1 + len - str.length >>> 0).join(chr); return leftJustify ? str + padding : padding + str; } function justify(value, prefix, leftJustify, minWidth, zeroPad) { var diff = minWidth - value.length; if (diff > 0) { if (leftJustify || !zeroPad) { value = pad(value, minWidth, ' ', leftJustify); } else { value = value.slice(0, prefix.length) + pad('', diff, '0', true) + value.slice(prefix.length); } } return value; } function formatBaseX(value, base, prefix, leftJustify, minWidth, precision, zeroPad) { // Note: casts negative numbers to positive ones var number = value >>> 0; prefix = prefix && number && {'2': '0b', '8': '0', '16': '0x'}[base] || ''; value = prefix + pad(number.toString(base), precision || 0, '0', false); return justify(value, prefix, leftJustify, minWidth, zeroPad); } function formatString(value, leftJustify, minWidth, precision, zeroPad) { if (precision != null) { value = value.slice(0, precision); } return justify(value, '', leftJustify, minWidth, zeroPad); } var a = arguments, i = 0, format = a[i++]; return format.replace(sprintf.regex, function(substring, valueIndex, flags, minWidth, _, precision, type) { if (substring == '%%') return '%'; // parse flags var leftJustify = false, positivePrefix = '', zeroPad = false, prefixBaseX = false; for (var j = 0; flags && j < flags.length; j++) switch (flags.charAt(j)) { case ' ': positivePrefix = ' '; break; case '+': positivePrefix = '+'; break; case '-': leftJustify = true; break; case '0': zeroPad = true; break; case '#': prefixBaseX = true; break; } // parameters may be null, undefined, empty-string or real valued // we want to ignore null, undefined and empty-string values if (!minWidth) { minWidth = 0; } else if (minWidth == '*') { minWidth = +a[i++]; } else if (minWidth.charAt(0) == '*') { minWidth = +a[minWidth.slice(1, -1)]; } else { minWidth = +minWidth; } // Note: undocumented perl feature: if (minWidth < 0) { minWidth = -minWidth; leftJustify = true; } if (!isFinite(minWidth)) { throw new Error('sprintf: (minimum-)width must be finite'); } if (!precision) { precision = 'fFeE'.indexOf(type) > -1 ? 6 : (type == 'd') ? 0 : void(0); } else if (precision == '*') { precision = +a[i++]; } else if (precision.charAt(0) == '*') { precision = +a[precision.slice(1, -1)]; } else { precision = +precision; } // grab value using valueIndex if required? var value = valueIndex ? a[valueIndex.slice(0, -1)] : a[i++]; switch (type) { case 's': return formatString(String(value), leftJustify, minWidth, precision, zeroPad); case 'c': return formatString(String.fromCharCode(+value), leftJustify, minWidth, precision, zeroPad); case 'b': return formatBaseX(value, 2, prefixBaseX, leftJustify, minWidth, precision, zeroPad); case 'o': return formatBaseX(value, 8, prefixBaseX, leftJustify, minWidth, precision, zeroPad); case 'x': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad); case 'X': return formatBaseX(value, 16, prefixBaseX, leftJustify, minWidth, precision, zeroPad).toUpperCase(); case 'u': return formatBaseX(value, 10, prefixBaseX, leftJustify, minWidth, precision, zeroPad); case 'i': case 'd': { var number = parseInt(+value); var prefix = number < 0 ? '-' : positivePrefix; value = prefix + pad(String(Math.abs(number)), precision, '0', false); return justify(value, prefix, leftJustify, minWidth, zeroPad); } case 'e': case 'E': case 'f': case 'F': case 'g': case 'G': { var number = +value; var prefix = number < 0 ? '-' : positivePrefix; var method = ['toExponential', 'toFixed', 'toPrecision']['efg'.indexOf(type.toLowerCase())]; var textTransform = ['toString', 'toUpperCase']['eEfFgG'.indexOf(type) % 2]; value = prefix + Math.abs(number)[method](precision); return justify(value, prefix, leftJustify, minWidth, zeroPad)[textTransform](); } default: return substring; } }); } sprintf.regex = /%%|%(\d+\$)?([-+#0 ]*)(\*\d+\$|\*|\d+)?(\.(\*\d+\$|\*|\d+))?([scboxXuidfegEG])/g; /** * Trival printf implementation, probably only useful during page-load. * Note: you may as well use "document.write(sprintf(....))" directly */ function printf() { // delegate the work to sprintf in an IE5 friendly manner: var i = 0, a = arguments, args = Array(arguments.length); while (i < args.length) args[i] = 'a[' + (i++) + ']'; document.write(eval('sprintf(' + args + ')')); } // -------------------------------------------------- // main // -------------------------------------------------- function main() { addLinkToTop(); } /** * Add a link right next to the "Get reverse directions" link at the * top */ function addLinkToTop() { getDirectionsButton = document.getElementById("d_sub"); if (!getDirectionsButton) return; span = $n("span",getDirectionsButton.parentNode); $t(" ",span); input = $n("input",span); input.className = "btn"; input.type = "button"; input.value = "Get Cab Fare"; input.addEventListener("click",function() {calculateFare(); return false;},true); } function calculateFare() { // // Now, get the distance and time // distTime = getDistanceAndTime(); dist = distTime[0]; mins = distTime[1]; price = calculatePrice(dist,mins); str = sprintf("Estimated cab fare: $%.2f for %.1f mi in %d mins",price,dist,mins); alert(str); } /** * Taken from: * http://www.nyc.gov/html/tlc/html/passenger/taxicab_rate.shtml */ function calculatePrice(dist,mins) { price = 0; price += 2.5; // $2.50 upon entry price += .4 * (0.3*mins); // 60 seconds when not in motion (assume 30%?) price += .4 * (5*dist); // one-fifth of a mile, traveling at 6 miles an hour or more if (isNight()) price += .5; // Night surcharge of $.50 after 8:00 PM & before 6:00 AM if (isPeak()) price += 1; // Peak hour Weekday Surcharge of $1.00 Monday - Friday after 4:00 PM & before 8:00 PM return price; } /** * @return whether it's after 8pm or before 6am */ function isNight() { d = new Date(); hs = d.getHours(); return hs<=6 || hs>=(8+12); } /** * @return whether it's Monday - Friday after 4:00 PM & before 8:00 PM */ function isPeak() { d = new Date(); hs = d.getHours(); if (hs <= (4+12) || hs >= (8+12)) return false; today = d.getDay().toLowerCase(); if (today.equals("sunday") || today.equals("saturday")) return false; return true; } /** * Returns the distance for this trip or -1 if not found. */ function getDistanceAndTime() { // // 3.4 // this sucks, I'll replace with xpath later // tds = document.getElementsByTagName("td"); if (!tds || tds.length == 0) return; td = 0; for (i in tds) { if (tds[i].className && tds[i].className.match(/timedist/)) { td = tds[i]; break; } } if (!td) return; dist = -1; time = -1; // // 3.4 mi (about 15 mins) // if (td.innerHTML) { if (res = td.innerHTML.match(/^([^&]+)&/)) { dist = res[1]; } if (res = td.innerHTML.match(/\(.*;(\d[^\)]+)\)/)) { timeStr = res[1]; time = convertTimeToMinutes(timeStr); } } return [dist,time]; } /** * Converts the following regex to minutes */ function convertTimeToMinutes(s) { if (res = s.match(/(\d+).*hours.*(\d+).*mins/)) { return 60*parseInt(res[1]) + parseInt(res[2]); } else if (res = s.match(/(\d+).*mins/)) { return parseInt(res[1]); } else { return 0; } } function getTime() { return 0; } // -------------------------------------------------- // Main // -------------------------------------------------- main();