uberprufungScript.js

// Sparklines on hover over restarant name
// restaurant closures
// restaurant cleanliness score
// link to restaurant cleanliness 

// http://www.inspections.vcha.ca/Inspection/Show/100c94cd-01a1-41f1-8d03-5d16f8e967e7

// restaurant closures ---  pdf ?

var rootUrl = 'http://www.inspections.vcha.ca/';
var restaurantName = '';
var latestInspectionUrl = '';
var restaurantFound = false;
var inspectionReportAvailable = false;
var uberContainer;


function getFirstRestaurantLink(data) {
    return $(data).find('#facilities-grid tr:nth-child(2) a').attr('href');

}

function getFirstInspectionLink(data) {
    var a = $(data).find('table.tabular .left a')[1];
    return rootUrl + $(a).attr('href');
}


// Searches for the given restaurant and returns the data as a promise 
function getSearchResultsByRestaurantName(restaurantName) {
    var searchUrl = rootUrl + 'Facility?report-type=ffffffff-ffff-ffff-ffff-fffffffffff1&sort-by=Name&search-term=' + encodeURIComponent(restaurantName) + '&submit-search=Search';
    console.log('making a request to: ' + searchUrl);
    return $.get(searchUrl, function(data) {
        // TODO: better search method
        // If no results, try shortening restaurant name
        // special characters
        // click on most relevant name
        // how to handle chains? - based on user location?
    });
}


// Given data from getSearchResultsByRestaurantName, it extracts the first restaurant result and makes a request to get the page with the inspection reports
// some restaurants don't have inspection reports
function getInspectionReports(data) {
    var firstRestaurantLink = getFirstRestaurantLink(data);

    if (typeof firstRestaurantLink != 'undefined') {
        restaurantFound = true;
        return $.get(rootUrl + firstRestaurantLink, function(data) {});
    }

}

// Given page with list of inspection reports from getInspectionReports, it extracts the first inspection link and makes a get request
function getLatestInspectionReportDetail(data) {
    // Extract latest inspection link
    if (restaurantFound) {
        latestInspectionUrl = getFirstInspectionLink(data);
        if (typeof latestInspectionUrl != 'undefined') {
            inspectionReportAvailable = true;
            return $.get(latestInspectionUrl, function(data) {});
        }
    }
}


function createUberprufungInfoBox() {
    uberContainer = $('<div class="safetyContainer"></div>');
    uberContainer.append("<p>Überprüfung</p>");
    var loadingGif = chrome.extension.getURL('loading.gif');
    uberContainer.append("<div id='uberLoading'><img src='" + loadingGif + "'/>Searching for restaurant info ...</div>");
    var pageTitleElement = $('.biz-page-header')[0];
    $(pageTitleElement).after(uberContainer);
}

// inserts link to safety info page after restaurant title
function insertSafetyInfoToDOM(data) {

    $('#uberLoading').remove();
    var totalObserv = getTotalNewObservations(data);
    if (!restaurantFound) {
        var rootUrlElement = getLinkElement(rootUrl, rootUrl);
        uberContainer.append("<p>" + restaurantName + " was not found. Conduct a manual search yourself here: </p>");
        uberContainer.append(rootUrlElement);
    } else if (!inspectionReportAvailable) {
        uberContainer.append("<p>No inspection reports found</p>");
    } else {
    	var restaurantSafetyLink = getLinkElement('Latest inspection link', latestInspectionUrl);
        uberContainer.append("<p>New observations: " + totalObserv + "</p>");
        uberContainer.append(restaurantSafetyLink);
    }
}

function getLinkElement(text, url) {
    var link = document.createElement("a");
    link.text = text;
    link.setAttribute('href', url);
    return link;
}

// Get the page with the observation table and return total count of new observations
function getTotalNewObservations(data) {
    // safety rating is calculated using the latest inspection report
    // it adds up the number of 'new observations' 
    // How to calculate the range?? 
    // Gets all of the new observations in the table
    if (inspectionReportAvailable) {

        var observations = $(data).find('.tabular td.left').next();
        // add up the total and return it
        return Array.prototype.reduce.call(observations, function(val1, val2) {
            return val1 + parseInt($(val2).text().trim());
        }, 0);
    }
}

function addSafetyRating(restaurantName) {
    // Todo: Error handling!!!!!!! 
    return getSearchResultsByRestaurantName(restaurantName)
        .then(getInspectionReports)
        .then(getLatestInspectionReportDetail)
        .then(insertSafetyInfoToDOM);

}


document.onreadystatechange = function() {
    if (document.readyState == "complete") {
        createUberprufungInfoBox();
        restaurantName = document.getElementsByClassName('biz-page-title')[0].textContent.trim();
        addSafetyRating(restaurantName);
    }
}