Firebase prep for final. The primary goal is to introduce the presidents database into the program.

Firebase Presidents

When working on this assignment, you should just update your existing firebase database application. There is no need to start a new firebase project unless you want to do so.


Make sure you have the latest firebase tools:

npm install -g firebase-tools

After an install on Monday, Nov 28, 2016:

firebase --version

Make sure you have the latest elven-help.js. First run git pull on JsObjects, then look in the Firebase directory like this:

ls $ELF_TEMPLATES/Firebase

You might want to meld it (merge) with your file so you can preserve the configuration data at the top of the file.

MakeHtml has also been updated. This is a minor change to get the latest versions of Bootstrap and Bootswatch. Go here, and run renewMakeHtml

cd ~/Git/JsObjects/JavaScript/NodeCode/MakeHtml

I added a new theme called readable and corrected a type, which called the cosmo theme cosmos. Check your config file, and if you are using the cosmos theme, switch it to cosmo. Here is a list of available themes:

var bootswatchUrls = {
    'cerulean': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/cerulean/bootstrap.min.css',
    'cosmo': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/cosmo/bootstrap.min.css',
    'cyborg': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/cyborg/bootstrap.min.css',
    'darkly': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/darkly/bootstrap.min.css',
    'flatly': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/flatly/bootstrap.min.css',
    'journal': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/journal/bootstrap.min.css',
    'lumen': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/lumen/bootstrap.min.css',
    'sandstone': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/sandstone/bootstrap.min.css',
    'slate': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/slate/bootstrap.min.css',
    'readable': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/readable/bootstrap.min.css',
    'spacelab': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/spacelab/bootstrap.min.css',
    'superhero': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/superhero/bootstrap.min.css',
    'united': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/united/bootstrap.min.css',
    'yeti': 'https://maxcdn.bootstrapcdn.com/bootswatch/3.3.7/yeti/bootstrap.min.css'

You only care about the key values such as cerulean, cosmo, cyborg and so on. The URLs are inserted automatically if you specify the theme you want ElvenConfig.json.

Listing Projects

List the projects you own:

firebase list
│ Name               │ Project ID / Instance │ Permissions │
│ elf-nov-16         │ elf-nov-16            │ Owner       │
│ prog270-calvert-01 │ prog270-calvert-01    │ Owner       │
│ elf03              │ elf03-587d6           │ Owner       │
│ elf04              │ elf04-af895           │ Owner       │
│ elf02 (current)    │ elf02-90eea           │ Owner       │

Take a screenshot of the output from your list command, or just block copy it as I have above, and display it on the start page of your Firebase web app.

Remember, by default, you must be authenticated (signed into Google) before you can access the database.

President User Input

We want the user to be able to enter the name of a new president. When a button is pushed, the president’s first and last names should be inserted into the database. Here are the controls that allow the user to enter in the name of a president:

<div class="majorBlock">
    <label for="elfFirstName">First Name</label>
    <input type="text" id="elfFirstName" name="elfFirstFirst">
    <label for="elfLastName">Last Name</label>
    <input type="text" id="elfLastName" name="elfLastName">

Or if you like, use the bootstrap panel, and you can avoid the majorBlock css issue:

<div class="panel panel-default">
  <div class="panel-heading">Database Input</div>
  <div class="panel-body">
        <label for="elfFirstName">First Name</label>
        <input type="text" id="elfFirstName" name="elfFirstFirst">
        <label for="elfLastName">Last Name</label>
        <input type="text" id="elfLastName" name="elfLastName">


Add this CSS to the bottom of css/style.css

div .majorBlock {
    border: solid black thin;
    background-color: #FFFFFC;
    border-radius: 8px;
    margin: 5px;
    padding: 5px;

President Buttons

Each button defined in this section is automatically paired with a method in elven-help.js. When the user clicks a button, it should initiate the action described in the button’s caption. For instance, if you enter in the first and last names for a president in the appropriate controls, then push the Insert New President button, a new president should be added to the database. For now, the new president will not be visible on the screen in the president’s list until you press the Get Presidents button.

Here is the code to define the input controls where you can enter a first and last name for a president.

<button id="elfPushPresident" class="btn btn-success">Insert New President</button>
<button id="elfGetPresidents" class="btn btn-success">Get Presidents</button>

And then under the buttons, you need a place to display the presidents:

<ul id="presidentsList"></ul>

Here are two more buttons. The first button will insert the data from JSON into the presidents database. This can be a quick way to import a known set of data, which is much faster than asking the user to enter the data over and over. For now, the Update President record doesn’t do anything very interesting.

<button id="elfInsertFromFile" class="btn btn-danger">Insert from File</button>
<button id="elfUpdatePresident" class="btn btn-default">Update President</button>

Here is an example of the file that contains data that can be loaded from the public directory:

	"first": "George",
	"last": "Washington"
}, {
	"first": "John",
	"last": "Adams"
}, {
	"first": "Thomas",
	"last": "Jefferson"

Call the file users.json.

Here are the buttons that allow you to have “chat” program, of sorts, between browser sessions. We worked with these earlier. The only change is that the Get All Qux Data button should now retrieve the entire history of the conversation. You can use it to refresh the conversation at any time.

<button id="elfInput" class="btn btn-success">Post Input</button>
<button id="elfDatabaseGetAllQux" class="btn btn-success">Get All Qux Data</button>

User Data

Here is a button for retrieving user data:

<button id="elfGetCurrentUser" class="btn btn-success">Get User Data</button>

Turn it in

Submit the URL for your deployed firebase application.