1

Work on server

This commit is contained in:
Alex Yatskov 2014-07-28 12:10:55 +09:00
parent ba8685b2a8
commit ffbaaf6f71
3 changed files with 140 additions and 127 deletions

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@ -1,125 +1,5 @@
'use strict';
function innerProduct(values1, values2) {
var result = 0;
for (var feature in values1) {
result += values1[feature] * (values2[feature] || 0.0);
}
return result;
}
function searchData(queryParams, minScore) {
var results = [];
for (var i = 0, count = DATA_RECORDS.length; i < count; ++i) {
var record = DATA_RECORDS[i];
var score = innerProduct(queryParams, record['rating']);
if (score >= minScore) {
results.push({
name: record['name'],
url: 'http://www.tripadvisor.com' + record['relativeUrl'],
score: score
});
}
}
results.sort(function(a, b) {
return b.score - a.score;
});
return results;
}
function searchStepper(range, steps, callback) {
var stepSize = range.getLength() / steps;
for (var i = 0; i < steps; ++i) {
var stepMax = range.end - stepSize * i;
var stepMin = stepMax - stepSize;
var stepMid = (stepMin + stepMax) / 2;
callback(stepMid);
}
}
function searchProjection(queryParams, minScore, feature, range, steps) {
var testParams = _.clone(queryParams);
var results = [];
searchStepper(range, steps, function(position) {
testParams[feature] = position;
results.push({
'sample': position,
'values': searchData(testParams, minScore)
});
});
return results;
}
function searchProjection2d(queryParams, minScore, feature1, feature2, range, steps) {
var testParams = _.clone(queryParams);
var results = [];
searchStepper(range, steps, function(sampleX) {
testParams[feature1] = sampleX;
searchStepper(range, steps, function(sampleY) {
testParams[feature2] = sampleY;
results.push({
'sampleX': sampleX,
'sampleY': sampleY,
'values': searchData(testParams, minScore)
});
});
});
return results;
}
function searchBuildHints(queryParams, minScore, feature, range, steps) {
var projection = searchProjection(
queryParams,
minScore,
feature,
range,
steps
);
var hints = [];
_.each(projection, function(result) {
hints.push({
'sample': result.sample,
'count': result.values.length
});
});
return hints;
}
function searchBuildHints2d(queryParams, minScore, feature1, feature2, range, steps) {
var projection = searchProjection2d(
queryParams,
minScore,
feature1,
feature2,
range,
steps
);
var hints = [];
_.each(projection, function(result) {
hints.push({
'sampleX': result.sampleX,
'sampleY': result.sampleY,
'count': result.values.length
});
});
return hints;
}
function outputResults(results, maxResults) {
$('#results').empty();
$('#count').text(results.length);

133
server/db/search.js Normal file
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@ -0,0 +1,133 @@
'use strict';
var _ = require('underscore');
var keywords = require('./keywords.json');
var data = require('./data.json');
function innerProduct(values1, values2) {
var result = 0;
for (var feature in values1) {
result += values1[feature] * (values2[feature] || 0.0);
}
return result;
}
function searchData(queryParams, minScore) {
var results = [];
for (var i = 0, count = DATA_RECORDS.length; i < count; ++i) {
var record = DATA_RECORDS[i];
var score = innerProduct(queryParams, record['rating']);
if (score >= minScore) {
results.push({
name: record['name'],
url: 'http://www.tripadvisor.com' + record['relativeUrl'],
score: score
});
}
}
results.sort(function(a, b) {
return b.score - a.score;
});
return results;
}
function searchStepper(range, steps, callback) {
var stepSize = range.getLength() / steps;
for (var i = 0; i < steps; ++i) {
var stepMax = range.end - stepSize * i;
var stepMin = stepMax - stepSize;
var stepMid = (stepMin + stepMax) / 2;
callback(stepMid);
}
}
function searchProjection(queryParams, minScore, feature, range, steps) {
var testParams = _.clone(queryParams);
var results = [];
searchStepper(range, steps, function(position) {
testParams[feature] = position;
results.push({
'sample': position,
'values': searchData(testParams, minScore)
});
});
return results;
}
function searchProjection2d(queryParams, minScore, feature1, feature2, range, steps) {
var testParams = _.clone(queryParams);
var results = [];
searchStepper(range, steps, function(sampleX) {
testParams[feature1] = sampleX;
searchStepper(range, steps, function(sampleY) {
testParams[feature2] = sampleY;
results.push({
'sampleX': sampleX,
'sampleY': sampleY,
'values': searchData(testParams, minScore)
});
});
});
return results;
}
function searchBuildHints(queryParams, minScore, feature, range, steps) {
var projection = searchProjection(
queryParams,
minScore,
feature,
range,
steps
);
var hints = [];
_.each(projection, function(result) {
hints.push({
'sample': result.sample,
'count': result.values.length
});
});
return hints;
}
function searchBuildHints2d(queryParams, minScore, feature1, feature2, range, steps) {
var projection = searchProjection2d(
queryParams,
minScore,
feature1,
feature2,
range,
steps
);
var hints = [];
_.each(projection, function(result) {
hints.push({
'sampleX': result.sampleX,
'sampleY': result.sampleY,
'count': result.values.length
});
});
return hints;
}
module.exports.getKeywords = function() {
return _.keys(keywords);
}
module.exports.execQuery = function() {
return {};
}

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@ -1,20 +1,21 @@
#!/usr/bin/env node
var express = require('express');
var keywords = require('./db/keywords.json');
var data = require('./db/data.json');
var _ = require('underscore');
'use strict';
var express = require('express');
var search = require('./db/search.js');
function main() {
var app = express();
app.use('/keywords', function(req, res) {
console.log('Requesting keywords');
res.json(_.keys(keywords));
res.json(search.getKeywords());
});
app.use('/search', function(req, res) {
console.log(req.query);
console.log('Requesting search');
res.json(search.execQuery());
});
app.listen(3000);
@ -23,4 +24,3 @@ function main() {
if (require.main === module) {
main();
}