JAMStack GR #3
Full Livestream, Video was missing when Keheira was coding. The video above has been edited down to my recap of Keheira's full demo.
Firebase Functions Serverless CRUD
In the below example there are 4 Firebase Functions that will be created.
functions/index.js
const functions = require('firebase-functions')
const admin = require('firebase-admin')
admin.initializeApp()
/*
Endpoint: /helloWorld
*/
exports.helloWorld = functions.https.onRequest((request, response) => {
response.send("Google Whack");
});
/*
C - Create
when user adds txt we push to the database
Endpoint: /addComment?text=
*/
exports.addComment = functions.https.onRequest(async(request, response) => {
word = request.query.text
snap = await admin.database().ref('/Words').push(word)
response.send("Word Added!")
})
/*
R - Read
kinda useless for this but I'm going to write it anyway
Endpoint: /readComments
*/
exports.readComments = functions.https.onRequest(async(request, response) => {
var items = []
//loop thru snapshots>grab children value>push to items
admin.database().ref('/Words').on('value', snap => {
snap.forEach(child => {
items.push(child.val())
})
})
response.send(items)
})
/*
U - Update
When user give a word we update it with another word
Endpoint: /updateComment?old=&new=
*/
//TODO: Fix the foolishness
exports.updateComment = functions.https.onRequest(async(request, response) => {
og_word = request.query.old
new_word = request.query.new
var key = null
//search db for old
admin.database().ref('/Words').on('value', snap => {
snap.forEach(child => {
if(child.val() === og_word) //check to see if the value is equal to the og text
key = child.key
})
})
//on successful key
if(key !== null){
snap = await admin.database().ref('/Words').child(key).set(new_word)
response.send("Word Updated!")
} else { //word not in the database
response.send("Word not found.")
}
})
/*
D - Delete
Allow user to delete a word
Endpoint: /deleteComment?text=
*/
exports.deleteComment = functions.https.onRequest(async(request, response) => {
word = request.query.text
var key = null
//loop thru snapshots>compare child value to word>if item exist delete it
admin.database().ref('/Words').on('value', snap => {
snap.forEach(child => {
if(child.val() === word)
key = child.key
})
})
if(key !== null){
snap = await admin.database().ref('/Words').child(key).remove()
response.send("Word Deleted!")
} else { //word not in the database
response.send("Word not found.")
}
})
Fixing Functions Code
There are a couple of snags in the above code, so we worked through how to update the readComment function. This is because Firebase Functions require
The first person to see this message and send a pull request to Keheira wins a free AJ t-shirt https://github.com/BackpackMedia/ServerlessExample/issues
exports.readComments = functions.https.onRequest(async(request, response) => {
var items = []
//loop thru snapshots>grab children value>push to items
const snapshot = await admin.database().ref('/Words').once('value');
snapshot.forEach(child => {
items.push(child.val())
})
response.send(items)
})
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