Seeing a Jen Person tutorial on the Firebase channel on youtube, I wrote a javascript function that is triggered when a user in my app uploads an image in Firebase Storage. This function generates a thumbnail of the image and saves it in Firebase Storage as well. My problem is: I do not know much javascript. I already have the URLs of the images that are in Storage, but I need to update the values of the respective childs in Firebase Database, and I need to store them in the current user ID, that is, what uploaded the file. Within each user ID I have, among other fields, the "image" and "thumb_image" fields that should store the URL of your images in Storage.
Here is my code:
exports.generateThumbnail = functions.storage.object().onChange(event => {
const object = event.data
const filePath = object.name
const fileName = filePath.split('/').pop()
const fileBucket = object.bucket
const bucket = gcs.bucket(fileBucket)
const tempFilePath = '/tmp/${fileName}'
const ref = admin.database().ref()
const file = bucket.file(filePath)
const thumbFilePath = filePath.replace(/(\/)?([^\/]*)$/, '$1thumb_$2')
if(fileName.startsWith('thumb_')) {
console.log('This file is already a thumbnail')
return
}
if(!object.contentType.startsWith('image/')) {
console.log('This is not an image to create thumbnail.')
return
}
if (object.resourceState === 'not_exists') {
console.log('There has been an image deletion event.')
return
}
return bucket.file(filePath).download({
destination: tempFilePath
}).then(() => {
console.log('Image downloaded locally to', tempFilePath)
return spawn('convert',[tempFilePath, '-thumbnail', '200x200>', tempFilePath])
}).then(() => {
console.log('Thumbnail created!')
return bucket.upload(tempFilePath, {
destination: thumbFilePath
})
}).then(() => {
const thumbFile = bucket.file(thumbFilePath)
const config = {
action: 'read',
expires: '03-09-2491'
}
return Promisse.all([
thumbFile.getSignedUrl(config),
file.getSignedUrl(config)
])
}).then(results => {
const thumbResult = results[0]
const originalResult = results[1]
const thumbFileUrl = thumbResult[0]
const fileUrl = originalResult[0]
// Não sei o que fazer a partir daqui
})
})
Is there any way to do this? Thank you in advance.
This is the structure of my Database:
