I am new to angular.js. I am trying to supposrt sessionStorage for a specific counter in my app using ngStorage
The following method returns the specific counter of comments. I want to store and read this counter using sessionStorage.
var commentCounter = function () {
var commentCounter = {
incrementCount:function () {
var currentCount = myCounter.readPageViewCount();
currentCount++;
myCounter.recordPageViewCount(currentCount);
},
recordPageViewCount:function (pageViewCount) {
var lastRecorded = new Date().toUTCString();
// Need to record the counter
},
readPageViewCount:function () {
var sessionCounter = 0;
// Read counter from session
return sessionCounter;
}
}
return commentCounter;
}
Can anyone help me to handle this sessionStorage in right direction?
Related
I am new in firebase and angularjs and i am having difficulties in getting download url from firebase storage and store them in firebase realtime database.
I was able to upload multiple files to firebase storage. the problem is when i store the download url into firebase realtime database, all database url value are same.It should different based each files downloadURL.
Here my script:
$scope.submitPhotos = function(file){
console.log(file);
var updateAlbum = [];
for (var i = 0; i < file.length; i++) {
var storageRef=firebase.storage().ref(albumtitle).child(file[i].name);
var task=storageRef.put(file[i]);
task.on('state_changed', function progress(snapshot){
var percentage=( snapshot.bytesTransferred / snapshot.totalBytes )*100;
if (percentage==100){
storageRef.getDownloadURL().then(function(url) {
var galleryRef = firebase.database().ref('gallery/'+albumkey);
var postkey = firebase.database().ref('gallery/'+albumkey).push().key;
updateAlbum={img:url};
firebase.database().ref('gallery/'+ albumkey+'/'+postkey).update(updateAlbum);
});
};
})
};
};
As you can see i was able store the url into database but all of the urls are same. What i need is every key store each different links from storage.
Any helps appreciated. Thanks
function uploadImg(file,i) {
return new Promise((resolve,reject)=>{
var storageRef=firebase.storage().ref("store-images/"+file[i].file.name);
task = storageRef.put(file[i].file);
task.on('state_changed', function progress(snapshot){
var percentage=( snapshot.bytesTransferred / snapshot.totalBytes )*100;
console.log(percentage);
// use the percentage as you wish, to show progress of an upload for example
}, // use the function below for error handling
function (error) {
console.log(error);
},
function complete () //This function executes after a successful upload
{
task.snapshot.ref.getDownloadURL().then(function(downloadURL) {
resolve(downloadURL)
});
});
})
}
async function putImage(file) {
for (var i = 0; i < file.length; i++) {
var dd = await uploadImg(file,i);
firebase.database().ref().child('gallery').push(dd);
}
}
Try using the code below:
$scope.submitPhotos = function(file){
console.log(file);
var updateAlbum = [];
for (var i = 0; i < file.length; i++) {
var storageRef=firebase.storage().ref(albumtitle).child(file[i].name);
var task=storageRef.put(file[i]);
task.on('state_changed', function progress(snapshot)
{
var percentage=( snapshot.bytesTransferred / snapshot.totalBytes )*100;
// use the percentage as you wish, to show progress of an upload for example
}, // use the function below for error handling
function (error) {
switch (error.code) {
case 'storage/unauthorized':
// User doesn't have permission to access the object
break;
case 'storage/canceled':
// User canceled the upload
break;
case 'storage/unknown':
// Unknown error occurred, inspect error.serverResponse
break;
}
}, function complete () //This function executes after a successful upload
{
let dwnURL = task.snapshot.downloadURL;
let galleryRef = firebase.database().ref('gallery/'+albumkey);
let postkey = firebase.database().ref('gallery/'+albumkey).push().key;
updateAlbum={img:dwnURL};
firebase.database().ref('gallery/'+ albumkey+'/'+postkey).update(updateAlbum);
});
};
};
All the best!
I have the following function in my Angular-app
$scope.retrieveProjectData = function() {
$scope.projectNumberNoChange = false;
// Only retrieve Data if the ProjectNumber changed
if (currentlySelectedProjectNumber != $scope.feedback.projectNumber.content) {
currentlySelectedProjectNumber = $scope.feedback.projectNumber.content;
// Go to database-reference based on the projectNumber
var projectsRef = firebaseDatabaseRef.child("projects");
var currentChild = projectsRef.child(currentlySelectedProjectNumber);
// retrieve data once and fill $scope.feedback
currentChild.once("value",
// If the project is found
function (dataSnapshot) {
// Fill selectedProject and hand over to writeDataFromSelectedProject()
var selectedProject = dataSnapshot.val();
// Fill $scope.feedback
writeDataFromSelectedProject(selectedProject);
},
// If no data is found
function () {
console.log("No data found");
});
}
// If the projectNumber didn't change, the projectNumberNoChangeMessage will be shown
else {
$scope.projectNumberNoChange = true;
}
};
The user has the possibility to load some data regarding his project-number (for instance: Name, email, tel) to make it faster for the user to fill a form.
In the part:
currentChild.once("value",
// If the project is found
function (dataSnapshot) {
// Fill selectedProject and hand over to writeDataFromSelectedProject()
var selectedProject = dataSnapshot.val();
// Fill $scope.feedback
writeDataFromSelectedProject(selectedProject);
},
// If no data is found
function () {
console.log("No data found");
});
only the first Callback-function is called, even if the projectNumber was not found. How can I use the "failureCallbackOrContext" as described in the docs?
Thanks for taking the time!
The problem was solved. I just checked the dataSnapshot.val() for beeing an object or null!
I am trying to add methods to an Object's protoype, which will be used in a singleton service and will be initiated only once when the service is created.
angular
.module('app.steps')
.factory('stepsService', stepsService);
stepsService.$inject = [];
/* #ngInject */
function stepsService() {
var steps = new Steps(1,3);
function Steps(current_step, total_steps) {
this.c_step = current_step;
this.t_step = total_steps;
}
Steps.prototype = {
addSteps: function (num) {
this.c_step += num;
},
setLastStep: function () {
this.lastStep = this.c_step = this.t_step;
}
};
var service = {
steps: steps
};
return service;
}
My problem is that although the object is created and initiated successfully, the methods are not there.
What is missing?
As mentioned in the comments, var steps = new Steps(1,3); should be after Steps.prototype = {....}
In my Service i have the vars i want to display and the getters for it:
var docsLoaded = 0;
var docsToLoad = null;
pouchService.getDocsLoaded = function () {
return docsLoaded;
};
pouchService.getDocsToLoad = function () {
return docsToLoad;
};
While the service is syncing, i want to count the synced docs
pouchService.syncNow = function () {
var foundLastSeq = false;
docsLoaded = 0;
docsToLoad = null;
remoteDB.info().then(function (remoteInfo) {
function findOutDiff(localPosition) {
docsToLoad = (remoteInfo.update_seq - localPosition) + 1;
console.log("docs to load: " + docsToLoad);
}
// start Sync progress
sync = localDB.sync(remoteDB, {live: false})
.on('change', function (info) {
console.log('AI change: ');
console.log(info);
if (info.direction === 'pull') {
if (foundLastSeq === false) {
foundLastSeq = true;
findOutDiff(info.change.last_seq);
}
}
console.log(docsLoaded + " from " + docsToLoad);
docsLoaded++;
})
In my HTML i want to display the progress like this:
{{pouchService.getDocsLoaded()}} from {{pouchService.getDocsToLoad()}}
Now i get sometimes a value from getDocsLoaded, but mostly its zero. When I cancel the Syncprogress i get the value where it's stopped.
So i get the value before it really starts and when it's over, but i want it during the sync progress. (on the console my my progressinfos are working as expected)
Any ideas?
The problem is in applying scope. Jim wrote a nice article about this problem:
jimhoskins.com/2012/12/17/angularjs-and-apply.html
Solved it:
$rootScope.$apply(function () {
docsLoaded++;
});
I'm trying to learn firebase/angularjs by extending an app to use firebase as the backend.
My forge looks like this
.
In my program I have binded firebaseio.com/projects to $scope.projects.
How do I access the children?
Why doesn't $scope.projects.getIndex() return the keys to the children?
I know the items are in $scope.projects because I can see them if I do console.log($scope.projects)
app.js
angular.module('todo', ['ionic', 'firebase'])
/**
* The Projects factory handles saving and loading projects
* from localStorage, and also lets us save and load the
* last active project index.
*/
.factory('Projects', function() {
return {
all: function () {
var projectString = window.localStorage['projects'];
if(projectString) {
return angular.fromJson(projectString);
}
return [];
},
// just saves all the projects everytime
save: function(projects) {
window.localStorage['projects'] = angular.toJson(projects);
},
newProject: function(projectTitle) {
// Add a new project
return {
title: projectTitle,
tasks: []
};
},
getLastActiveIndex: function () {
return parseInt(window.localStorage['lastActiveProject']) || 0;
},
setLastActiveIndex: function (index) {
window.localStorage['lastActiveProject'] = index;
}
}
})
.controller('TodoCtrl', function($scope, $timeout, $ionicModal, Projects, $firebase) {
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
var keys = $scope.projects.$getIndex();
console.log($scope.projects.$child('-JGTmBu4aeToOSGmgCo1'));
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("" + keys[0]);
});
// A utility function for creating a new project
// with the given projectTitle
var createProject = function(projectTitle) {
var newProject = Projects.newProject(projectTitle);
$scope.projects.$add(newProject);
Projects.save($scope.projects);
$scope.selectProject(newProject, $scope.projects.length-1);
};
// Called to create a new project
$scope.newProject = function() {
var projectTitle = prompt('Project name');
if(projectTitle) {
createProject(projectTitle);
}
};
// Called to select the given project
$scope.selectProject = function(project, index) {
$scope.activeProject = project;
Projects.setLastActiveIndex(index);
$scope.sideMenuController.close();
};
// Create our modal
$ionicModal.fromTemplateUrl('new-task.html', function(modal) {
$scope.taskModal = modal;
}, {
scope: $scope
});
$scope.createTask = function(task) {
if(!$scope.activeProject || !task) {
return;
}
console.log($scope.activeProject.task);
$scope.activeProject.task.$add({
title: task.title
});
$scope.taskModal.hide();
// Inefficient, but save all the projects
Projects.save($scope.projects);
task.title = "";
};
$scope.newTask = function() {
$scope.taskModal.show();
};
$scope.closeNewTask = function() {
$scope.taskModal.hide();
};
$scope.toggleProjects = function() {
$scope.sideMenuController.toggleLeft();
};
// Try to create the first project, make sure to defer
// this by using $timeout so everything is initialized
// properly
$timeout(function() {
if($scope.projects.length == 0) {
while(true) {
var projectTitle = prompt('Your first project title:');
if(projectTitle) {
createProject(projectTitle);
break;
}
}
}
});
});
I'm interested in the objects at the bottom
console.log($scope.projects)
Update
After digging around it seems I may be accessing the data incorrectly. https://www.firebase.com/docs/reading-data.html
Here's my new approach
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
projectRef.on('value', function(snapshot) {
if(snapshot.val() === null) {
console.log('location does not exist');
} else {
console.log(snapshot.val()['-JGTdgGAfq7dqBpSk2ls']);
}
});
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("a");
});
I'm still not sure how to traverse the keys programmatically but I feel I'm getting close
It's an object containing more objects, loop it with for in:
for (var key in $scope.projects) {
if ($scope.projects.hasOwnProperty(key)) {
console.log("The key is: " + key);
console.log("The value is: " + $scope.projects[key]);
}
}
ok so val() returns an object. In order to traverse all the children of projects I do
// Load or initialize projects
//$scope.projects = Projects.all();
var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects";
var projectRef = new Firebase(projectsUrl);
projectRef.on('value', function(snapshot) {
if(snapshot.val() === null) {
console.log('location does not exist');
} else {
var keys = Object.keys(snapshot.val());
console.log(snapshot.val()[keys[0]]);
}
});
$scope.projects = $firebase(projectRef);
$scope.projects.$on("loaded", function() {
// Grab the last active, or the first project
$scope.activeProject = $scope.projects.$child("a");
});
Note the var keys = Object.keys() gets all the keys at firebaseio.com/projects then you can get the first child by doing snapshot.val()[keys[0])