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325
gaia/shared/js/fb/fb_reader_utils.js
Executable file
325
gaia/shared/js/fb/fb_reader_utils.js
Executable file
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'use strict';
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// Includes convenience functions for FB Contact Data
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// To use this library you need to include:
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// 'shared/js/fb/fb_request.js' and 'shared/js/fb/fb_data_reader.js'
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var fb = self.fb || {};
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self.fb = fb;
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if (!self.AuxFB) {
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self.AuxFb = (function() {
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var CATEGORY = 'facebook';
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var NOT_LINKED = 'not_linked';
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var LINKED = 'fb_linked';
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// Shallow copy from source to target object
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function populate(source, target, propertyNames) {
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propertyNames.forEach(function(property) {
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var propertyValue = source[property];
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if (propertyValue) {
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if (Array.isArray(propertyValue)) {
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target[property] = propertyValue.slice(0, propertyValue.length);
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} else {
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target[property] = propertyValue;
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}
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}
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});
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}
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// Auxiliary function for merging
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function mergeFbData(dcontact, fbdata) {
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var multipleFields = ['email', 'tel', 'photo', 'org', 'adr'];
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multipleFields.forEach(function(field) {
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if (!dcontact[field]) {
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dcontact[field] = [];
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}
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var items = fbdata[field];
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if (items) {
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items.forEach(function(item) {
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// If there are no duplicates the merge is done
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var dupList = checkDuplicates(field, item, dcontact[field],
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fbdata.shortTelephone);
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if (dupList.length === 0) {
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dcontact[field].push(item);
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}
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});
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}
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});
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var singleFields = ['bday', 'anniversary'];
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singleFields.forEach(function(field) {
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if (!dcontact[field]) {
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dcontact[field] = fbdata[field];
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}
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});
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// To support the case in which the contact does not have a local name
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mergeNames(dcontact, fbdata);
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}
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// Auxiliary function for merging names
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function mergeNames(devContact, fbContact) {
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var namesChanged = false;
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var nameFields = ['givenName', 'familyName'];
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nameFields.forEach(function(anameField) {
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// If the device contact does not have name fields setted
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// we use the Facebook ones
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var fieldValue = devContact[anameField];
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var fbValue = fbContact[anameField];
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if ((!Array.isArray(fieldValue) || fieldValue.length === 0) &&
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Array.isArray(fbValue) && fbValue.length > 0) {
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namesChanged = true;
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devContact[anameField] = (fieldValue && fieldValue[0]) || [];
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devContact[anameField].push(fbValue[0]);
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}
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});
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if (namesChanged) {
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var givenName = devContact.givenName[0] || '';
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var familyName = devContact.familyName[0] || '';
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devContact.name = [givenName + ' ' + familyName];
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}
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}
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/**
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* Returns truthy if the device contact is a FB Friend
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*
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*/
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function isFbContact(devContact) {
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return (devContact && devContact.category &&
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devContact.category.indexOf(CATEGORY) !== -1);
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}
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/**
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* Returns truthy if the device contact is linked to a FB Friend
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*
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*/
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function isFbLinked(devContact) {
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return (devContact && devContact.category &&
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devContact.category.indexOf(LINKED) !== -1);
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}
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/**
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* Gets all the data enriching the local contact with FB information
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*
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*/
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function getData(devContact) {
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var outReq = new fb.utils.Request();
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window.setTimeout(function do_getData() {
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var uid = getFriendUid(devContact);
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if (uid) {
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var fbreq = fb.contacts.get(uid);
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fbreq.onsuccess = function() {
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var fbdata = fbreq.result;
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var out = mergeContact(devContact, fbdata);
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outReq.done(out);
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};
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fbreq.onerror = function() {
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outReq.failed(fbreq.error);
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};
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}
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else {
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outReq.done(devContact);
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}
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}, 0);
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return outReq;
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}
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/**
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* Returns the FB Friend UID associated to a device contact
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*
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*/
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function getFriendUid(devContact) {
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var out = devContact.uid;
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if (!out) {
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if (isFbLinked(devContact)) {
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out = getLinkedTo(devContact);
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}
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else if (devContact.category) {
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var idx = devContact.category.indexOf(CATEGORY);
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if (idx !== -1) {
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out = devContact.category[idx + 2];
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}
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}
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}
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return out;
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}
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/**
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* Gets the UID of the FB Friend a device contact is linked to
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*
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*/
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function getLinkedTo(devContact) {
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var out;
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if (devContact.category) {
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var idx = devContact.category.indexOf(LINKED);
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if (idx !== -1) {
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out = devContact.category[idx + 1];
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}
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}
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return out;
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}
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/**
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* Merge a device contact with a FB Friend
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*
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*/
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function mergeContact(devContact, fbContact) {
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var out = devContact;
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if (fbContact) {
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out = Object.create(null);
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out.updated = devContact.updated;
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out.published = devContact.published;
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// The id comes from devContact and the rest of properties like
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// familyName, propertyName, etc... are defined in the proto object
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populate(devContact, out, Object.getOwnPropertyNames(devContact));
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populate(devContact, out,
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Object.getOwnPropertyNames(Object.getPrototypeOf(devContact)));
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mergeFbData(out, fbContact);
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}
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return out;
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}
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/**
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* Returns a FB Contact (enriched with FB info) which has the tel number
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*
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*/
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function getContactByNumber(number, onsuccess, onerror) {
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var req = fb.contacts.getByPhone(number);
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req.onsuccess = function get_by_phone_success(e) {
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var fbData = req.result;
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if (fbData) {
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fb.getMozContactByUid(fbData.uid, function merge(result) {
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if (Array.isArray(result) && result[0]) {
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var finalContact = fb.mergeContact(result[0], fbData);
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onsuccess(finalContact);
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}
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else {
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onsuccess(null);
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}
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}, function error_get_mozContact(err) {
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console.error('Error getting mozContact: ', err.name);
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onerror(err);
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});
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}
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else {
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onsuccess(null);
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}
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};
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req.onerror = function() {
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onerror(req.error);
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};
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}
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// Checks whether there is a duplicate for the field value
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// both in FB and in the local device Contact data
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// Returns an array with the values which are duplicated or empty if
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// no duplicates were found
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// Parameters are: field on which to search, the corresponding fbItem
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// the local device items, and extra FB Items which corresp to the short
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// telephone numbers allowing to filter out dups with intl-ed numbers
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function checkDuplicates(field, fbItem, devContactItems, extraFbItems) {
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var potentialDuplicatesFields = ['email', 'tel'];
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var out = [];
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if (devContactItems &&
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potentialDuplicatesFields.indexOf(field) !== -1) {
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var total = devContactItems.length;
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for (var i = 0; i < total; i++) {
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var localValue = devContactItems[i].value;
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var fbValue = fbItem.value;
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// Checking for telephone international number matching
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if (localValue) {
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var trimedLocal = localValue.trim();
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if (trimedLocal === fbValue ||
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(field === 'tel' && Array.isArray(extraFbItems) &&
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extraFbItems.indexOf(trimedLocal) !== -1)) {
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out.push(trimedLocal);
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out.push(fbValue);
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}
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} // if(localValue)
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} // for
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} // if(devContactItems)
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return out;
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}
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/**
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* Returns the mozContact associated to a certain FB UID
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*
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*/
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function getMozContactByUid(uid, onsuccess, onerror) {
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var filter = {
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filterBy: ['category'],
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filterValue: uid,
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filterOp: 'contains'
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};
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var req = navigator.mozContacts.find(filter);
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req.onsuccess = function() {
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onsuccess(req.result);
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};
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req.onerror = function() {
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onerror(req.error);
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};
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}
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return {
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'isFbContact': isFbContact,
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'isFbLinked': isFbLinked,
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'getData': getData,
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'getFriendUid': getFriendUid,
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'getLinkedTo': getLinkedTo,
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'mergeContact': mergeContact,
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'getContactByNumber': getContactByNumber,
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'getMozContactByUid': getMozContactByUid,
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'checkDuplicates': checkDuplicates,
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get CATEGORY() {
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return CATEGORY;
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},
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get LINKED() {
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return LINKED;
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},
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get NOT_LINKED() {
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return NOT_LINKED;
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}
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};
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})();
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// This boilerplate code sets the AuxFb properties to the fb object
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var props = Object.keys(self.AuxFb);
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for (var j = 0, end = props.length; j < end; j++) {
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/* jshint loopfunc: true */
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var prop = props[j];
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if (typeof self.fb[prop] === 'function') {
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self.fb[prop] = self.AuxFb[prop];
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}
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else {
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Object.defineProperty(self.fb, prop, {
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value: (function() {
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return self.AuxFb[prop];
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})(), writable: false, enumerable: true, configurable: false
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});
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}
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}
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}
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