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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<style>
body { font-family: 'Cantarell', Helvetica, Arial, sans-serif; margin: 2em; }
.twitter-typeahead { width: 87%; }
.typeahead, .tt-query, .tt-hint {
width: 100%; height: 30px;
padding: 8px 12px; outline: none;
font-size: 20px; line-height: 30px;
border: 2px solid #ccc; border-radius: 8px;
-webkit-border-radius: 8px;
-moz-border-radius: 8px;
}
.tt-menu {
width: 100%; margin: 12px 0; padding: 8px 0;
background-color: #fff;
border: 1px solid #ccc; border-radius: 8px;
-webkit-border-radius: 8px;
-moz-border-radius: 8px;
-webkit-box-shadow: 0 5px 10px rgba(0,0,0,.2);
-moz-box-shadow: 0 5px 10px rgba(0,0,0,.2);
box-shadow: 0 5px 10px rgba(0,0,0,.2);
}
.tt-suggestion { padding: 3px 20px; line-height: 24px; font-size: 18px; }
.tt-suggestion:hover { cursor: pointer; }
.tt-suggestion span { padding-left: 16px; font-size: 14px; color: #777; float: right; }
.tt-cursor { background: #ddd; }
.tt-highlight { font-weight: normal; color: #777; }
.tt-hint { color: #9598; }
#selections { width: 87%; padding-top: 40px; }
#selections div { padding: 4px 40px; line-height: 24px; font-size: 18px; color: #666; }
#selections div span { padding-left: 16px; font-size: 14px; color: #999; float: right; }
.-info- { font-size: 12px !important; color: #959 !important;
font-family: 'JetBrains Mono NL', Consolas, Monaco, monospace, fixed !important;
line-height: 14px !important; border-bottom: 1px solid #ddda;
}
.-info- b { font-weight: 900; }
</style>
<!-- js labraries -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/corejs-typeahead/1.2.1/bloodhound.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/corejs-typeahead/1.2.1/typeahead.jquery.min.js"></script>
</head>
<body>
<div id="the-basics">
<input class="typeahead" id="tagsInput" type="text" placeholder="try me!">
</div>
<div id="selections">
</div>
</body>
<script>
// PUBLIC VARIABLES ////////////////////////////////////////////////////////////
var _kwlinks; // keyword links (word-connections; imported via ajax-get)
var _products; // all products (imported via ajax-get)
var trackSearch = []; // searching analytics
// setup options
var maxResults = 24; // limit suggestions
var blendProds = 4; // minimum final-produncts to blend with next-word suggestions
var allowFuzzy = false; // enable|disable fuzzy search
var bi1stScore = .65; // bigram minimum match score for 1st word
var bi2ndScore = .85; // bigram minimum match score for 2nd word
var ignoredKeys_kb = []; // keywords to ignore (in kb-format)
['μας με σε για του της των από στο στον &'].split(' ').forEach(w => { ignoredKbs.push(kb_trans(w)); });
// SUPLAMENARY FUNCTIONS ///////////////////////////////////////////////////////
// arrays for kb-format (utf/EL-Gr to ascii translation)
var ORiGiNal = 'ςερτυθιοπασδφγηξκλζχψωβνμΕΡΤΥΘΙΟΠΑΣΔΦΓΗΞΚΛΖΧΨΩΒΝΜάέήίόύώϊϋΆΈΉΊΌΎΏΪΫQWERTYUIOPASDFGHJKLZXCVBNMqwertyuiopasdfghjklzxcvbnm0123456789-'.split('');
var kbKeyZed = 'sertyuiopasdfghjklzxcvbnmertyuiopasdfghjklzxcvbnmaehioyviyaehioyviyqwertyuiopasdfghjklzxcvbnmqwertyuiopasdfghjklzxcvbnm0123456789-'.split('');
const map = new Map();
for (var i=0; i<ORiGiNal.length; i++) map.set(ORiGiNal[i], kbKeyZed[i]);
// function kb_trans
// translates string to keyboard-latin keys;
// [map]'s implementation is 40x faster than [for]'s
function kb_trans(str) {
str = str.replace('\'','');
var out = ''
for (var i=0 ; i< str.length; i++) out += map.get(str[i]);
return out;
}
// pure JS ajax GET request; return data as JSON
// no fancy things like UTF8; if needed use base64
// ---
function ajax_get(url, callback) {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
try {
var data = JSON.parse(xmlhttp.responseText);
} catch(err) {
console.log(err.message + " in " + xmlhttp.responseText);
return;
}
callback(data);
}
};
xmlhttp.open("GET", url, true);
xmlhttp.send();
}
// bigram fuzzy match
// --- credit: https://dirask.com/posts/JavaScript-check-words-similarity-fuzzy-compare-with-bigrams-paola1
const createBigram = word => {
const input = word.toLowerCase();
const vector = [];
for (let i = 0; i < input.length; ++i) {
vector.push(input.slice(i, i + 2));
}
return vector;
};
const checkSimilarity = (a, b) => {
if (!allowFuzzy) return false;
if (a.length > 0 && b.length > 0) {
const aBigram = createBigram(a);
const bBigram = createBigram(b);
let hits = 0;
for (let x = 0; x < aBigram.length; ++x) {
for (let y = 0; y < bBigram.length; ++y) {
if (aBigram[x] === bBigram[y]) {
hits += 1;
}
}
}
if (hits > 0) {
const union = aBigram.length + bBigram.length;
return (2.0 * hits) / union;
}
}
return 0;
};
// compact print of search-tracking
// ---
function echo_tracking() {
var actions = [];
var c;
var chs = 0; // number of characters pressed;
var uis = 0; // number of UI actions used (arrows, enters etc.)
var countingStarted = false; // flag
trackSearch.forEach(e => {
switch(e.v) {
// use of ui actions
case 'ArrowDown' : c = '↓'; uis++; break;
case 'ArrowUp' : c = '↑'; uis++; break;
case 'Enter' : c = '↲ '; uis++; break;
case 'ArrowLeft' : c = '←'; uis++; break;
case 'ArrowRight': c = '→'; uis++; break;
case ' ' : c = '· '; uis++; break;
// ignored keys
case 'Alt' : c = 'Alt'; break;
case 'Control' : c = 'Ctrl'; break;
case 'Escape' : c = 'Esc'; break;
case 'Shift' : c = 'Shft'; break;
case 'Home' : c = 'Home'; break;
case 'End' : c = 'End'; break;
// backspace (user's typing errors)
case 'Backspace' : c = 'BkSp'; break;
case 'Delete' : c = 'Del'; break;
// actual typed characters
default:
if (e.v.length == 1) {
c = '<b><u>'+ e.v +'</u></b>';
chs++;
}
else { // some non important key; no counter increased
c = e.v; // just record the key
}
}
actions.push(c);
});
return actions.join(',') +' (<u>'+ chs +' chs</u>, '+ uis +' uis)';
}
// workline object to track status of async svents
// ---
var workline = {
trackerJL : 0,
set jsonLoaded(x) {
this.trackerJL = x;
// fire event on certain values
if (x == 2) {
console.log('All streams loaded');
// code to execute
// ...
}
},
get jsonLoaded() { return this.trackerJL; }
};
// LOAD DATA ///////////////////////////////////////////////////////////////////
ajax_get('results/keywords-v3.json', function(data) {
_kwlinks = data;
workline.jsonLoaded++; console.log('keywords loaded');
});
ajax_get('results/products.json', function(data) {
_products = data;
workline.jsonLoaded++; console.log('products loaded')
});
// on document ready code ///////////////////////////////////////////////////////
$(document).ready(function() {
// suggestions engine //////////////////////////////////////////////////////
// ---
function suggestions_engine(qOrig) {
var results = []; // suggestions to respond
var proList = []; // list of products (for all suggestions)
var commonL = []; // list of common products (for multiple suggestions)
var possibleNext = []; // list of possible next suggestions
var root, last;
// clean q(uery) string from symbols and multiple spaces
var q = qOrig.replace('+',' ').replace('.',' ')
.replace(' ',' ')
.replace(' ',' ');
var qAr = q.split(' '); // split to words
if (qAr.length == 1) { // suggest 1st word ////////////////////////
var kbq = kb_trans(q)
// ### (-) regex match all possible suggestions; (in kb-format)
// ### (-) substrRegex = new RegExp( kbq, 'i'); // match q anywhere
_kwlinks.forEach( it => {
// ### (-) if ( (substrRegex.test(it.kb))
if ( (it.kb.indexOf(kbq) !== -1)
|| (checkSimilarity(it.kb, kbq) > bi1stScore) ) {
// a match found
results.push(it);
// also get possible products
// (but only if products are less max-results)
if (proList.length < maxResults + 2) {
it.c.forEach( wo => { proList = proList.concat(wo.p); });
// keep unique products in the list
proList = proList.filter((item, i, ar) => ar.indexOf(item) === i);
}
}
});
}
if (qAr.length == 2) { // suggest 2nd word ///////////////////////////
root = qAr[0].trim();
kbroot = kb_trans(root);
// ### (-) substrRegex = new RegExp( kb_trans(qAr[1]), 'i');
_kwlinks.forEach( it => { // loop through suggestions
if (it.kb == kbroot ) { // match 1st suggestion
it.c.forEach ( wo => { // regex match linked words
// ### (-) if ( (substrRegex.test(wo.kb))
if ( (wo.kb.indexOf(qAr[1]) !== -1)
|| (checkSimilarity(wo.kb, kbroot) > bi2ndScore) ) {
results.push({
w: root +' '+ wo.w,
f: 100
});
proList = proList.concat(wo.p)
}
});
}
});
}
if (qAr.length > 2) {
root = qAr.shift(); // get out the first item of tempQAr
last = qAr.pop(); // get out the lase item of qAr
// now qAr includes only the items after root and before last;
// so qAr includes all already selected suggestions (but root)
// prepare/cache kb-formats for any key we may need
// ---
var kbqAr = []; // array of selected suggestions in kb-format
qAr.forEach( w => { kbqAr.push(kb_trans(w)); })
// kb-translate the root/last keys too
kbroot = kb_trans(root);
kblast = kb_trans(last);
// ### (-) substrRegex = new RegExp( kblast, 'i'); // construct regex for mathing
_kwlinks.forEach( it => {
if (it.kb == kbroot ) { // find root
// calculate list of common items/products (commonL)
// for selected suggestions
// ---
is1stOcc = true; // 1st occurance flag
it.c.forEach ( swo => {
if (kbqAr.indexOf( swo.kb ) !== -1) {
// swo is one of the already selected suggestions
// so...
// update the commonL(ist)
if (is1stOcc) {
commonL = swo.p; // init list (on 1st occurance)
is1stOcc = false;
}
else {
// caclulate list of common products
// = intersection of (so-far) commonL and swo.p
// commonL = commonL.filter(value => swo.p.includes(value));
commonL = commonL.filter(function(n) { return swo.p.indexOf(n) !== -1; });
}
}
else { // if swo is not already selected
// then it is a possible next suggestion
possibleNext.push(swo);
}
});
possibleNext.forEach( poss => { // for tthe possible next suggestions
// if word matches regex
// and list of word's products has commons with commonL
// then it is a valid next suggestion
if (poss.kb.indexOf(kblast) !== -1 ) {
// check intersection of commonL and suggestion's product-lists
tempL = commonL.filter(value => poss.p.includes(value));
if (tempL.length) {
results.push({
w: root +' '+ qAr.join(' ') +' '+ poss.w,
f: 100
});
// update proList too
proList = proList.concat(tempL)
}
}
});
}
});
}
// calculate unique products
let unique = proList.filter((item, i, ar) => ar.indexOf(item) === i);
// credit: https://stackoverflow.com/questions/11246758/
// console.log(q, qAr, qAr.length, proList.length);
if (unique.length < (maxResults +1)) {
results = [];
unique.forEach( pr => {
_products.forEach( pi => {
if (pi.id == pr)
results.push(pi);
})
});
}
return results;
}
// request suggestions procedure
// args...
// qOrig: original query string
// list: artay structure to host results
// ---
var isuggest = function(qOrig, list) {
var results = suggestions_engine(qOrig);
// if no results...
// request again after removing last (key)word
if (results.length == 0) {
var qAr = qOrig.trim().split(' ');
qAr.pop(); // remove last word
results = suggestions_engine(qAr.join(' '));
}
list(results);
}
// setup suggestions search/input control
// ---
const $tagsInput = $('#tagsInput')
$tagsInput.typeahead(
{
hint: true,
highlight: true,
minLength: 1
},
{
limit: maxResults,
name: 'kwlinks',
displayKey: 'w',
source: isuggest,
templates: {
suggestion: function(data) {
// console.log(data.w);
if (data.id)
return '<div>'+ data.w + '<span>' + data.id + '</span></div>';
return '<div>'+ data.w +'<span>+</span></div>';
}
}
}
)
.bind("typeahead:selected", function(obj, datum, name) {
// console.log(datum);
if (datum.hasOwnProperty('id')) {
// final product selected; do whatever ...
// ex. add to selection list
$('#selections').append('<div>'+ datum.w + '<span>' + datum.id + '</span></div>');
// then reset search control
$('.typeahead').typeahead('val','').trigger('blur')
.trigger("query");
setTimeout(() => { $('.typeahead').focus(); }, 100);
// finaly save tracking info;
$('#selections').append('<div class="-info-">'+ echo_tracking() +'</div>');
trackSearch.length = 0; // ... and reset info to be ready for nextsearch
}
else {
$('.typeahead').typeahead('val','').trigger('blur');
$('.typeahead').typeahead('val', datum.w +' ')
.trigger("query");
// give some time to the engine to calculate results
// then fire focus again...
setTimeout(() => { $('.typeahead').focus(); }, 100);
}
trackSearch.push({
e: 'key',
v: 'Enter',
i: $('#tagsInput').val()
});
})
.bind("typeahead:cursorchange", function(obj, data) {
// console.log(obj, data);
// var dt = new Date();
// console.log('triggered cursorchange /'+dt);
});
// TRACK user search attempt ///////////////////////////////////////////////
$('.typeahead').on('keyup', function(e) {
trackSearch.push({
e: 'key',
v: e.key,
i: $('#tagsInput').val()
});
});
});
// also check (for suearching benchmarks)
// ---
// https://www.measurethat.net/Benchmarks/Show/13675/0/regextest-vs-stringincludes-vs-stringmatch
// https://stackoverflow.com/questions/5296268/fastest-way-to-check-a-string-contain-another-substring-in-javascript
// https://stackoverflow.com/questions/40387106/string-startwith-vs-regex
// https://www.measurethat.net/Benchmarks/Show/4797/1/js-regex-vs-startswith-vs-indexof
</script>
</html>
|
