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updated app.js instructions in presence.md #263 #263

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Oct 17, 2024
Merged

updated app.js instructions in presence.md #263 #263

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33 changes: 8 additions & 25 deletions presence.md
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Original file line number Diff line number Diff line change
Expand Up @@ -321,28 +321,28 @@ const peopleListDesktop = document.getElementById('people_online-list-desktop');
// This function will be probably caught when the person first enters the page
channel.on('presence_state', function (payload) {
// Array of objects with id and name
const currentlyOnlinepeople = Object.entries(payload).map(elem => ({name: elem[0], id: elem[1].metas[0].phx_ref}))
const currentlyOnlinePeople = Object.entries(payload).map(elem => ({name: elem[0], id: elem[1].metas[0].phx_ref}))

updateOnlinePeopleList(currentlyOnlinepeople)
updateOnlinePeopleList(currentlyOnlinePeople)
})

// Listening to presence events whenever a person leaves or joins
channel.on('presence_diff', function (payload) {
if(payload.joins && payload.leaves) {
// Array of objects with id and name
const currentlyOnlinepeople = Object.entries(payload.joins).map(elem => ({name: elem[0], id: elem[1].metas[0].phx_ref}))
const currentlyOnlinePeople = Object.entries(payload.joins).map(elem => ({name: elem[0], id: elem[1].metas[0].phx_ref}))
const peopleThatLeft = Object.entries(payload.leaves).map(elem => ({name: elem[0], id: elem[1].metas[0].phx_ref}))

updateOnlinePeopleList(currentlyOnlinepeople)
updateOnlinePeopleList(currentlyOnlinePeople)
removePeopleThatLeft(peopleThatLeft)
}
});

function updateOnlinePeopleList(currentlyOnlinepeople) {
function updateOnlinePeopleList(currentlyOnlinePeople) {
// Add joined people
for (var i = currentlyOnlinepeople.length - 1; i >= 0; i--) {
const name = currentlyOnlinepeople[i].name
const id = name + "-" + currentlyOnlinepeople[i].id
for (var i = currentlyOnlinePeople.length - 1; i >= 0; i--) {
const name = currentlyOnlinePeople[i].name
const id = name + "-" + currentlyOnlinePeople[i].id

if (document.getElementById(name) == null) {
var liMobile = document.createElement("li"); // create new person list item DOM element for mobile
Expand All @@ -368,30 +368,13 @@ function removePeopleThatLeft(peopleThatLeft) {
const personThatLeftMobile = document.getElementById(id + '_mobile')
const personThatLeftDesktop = document.getElementById(id + '_desktop')



if (personThatLeftMobile != null && personThatLeftDesktop != null) {
peopleListMobile.removeChild(personThatLeftMobile); // remove the person from list mobile
peopleListDesktop.removeChild(personThatLeftDesktop); // remove the person from list desktop
}
}
}

function removePeopleThatLeft(peopleThatLeft) {
// Remove people that left
for (var i = peopleThatLeft.length - 1; i >= 0; i--) {
const name = peopleThatLeft[i]

const personThatLeftMobile = document.getElementById(name + '_mobile')
const personThatLeftDesktop = document.getElementById(name + '_desktop')
if (personThatLeftMobile != null && personThatLeftDesktop != null) {
peopleListMobile.removeChild(personThatLeftMobile); // remove the person from list mobile
peopleListDesktop.removeChild(personThatLeftDesktop); // remove the person from list desktop
}
}
}


function sanitizeString(str){
str = str.replace(/[^a-z0-9áéíóúñü \.,_-]/gim,"");
return str.trim();
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