Complete my PR and logout confirmation modal.

My PR was finally merged yesterday on git repository. To my shame, I didn't know well the way that I implement the code simply and exactly. I also had mistake like missing space or semicolon, although I did check my code with lint. I should learn and study about that according to practice coding many times and taking a look others' code. And I should be more methodical person about my work.


I implemented a confirmation modal for logout.
In current code, a modal is already used for Setting menu. So I tried to use the same function and style with it. However, a modal for confirmation was shown behind of Setting menu, not in front of it and I couldn't click any button on confirmation modal.So I implemented another modal for confirmation.

This modal is shown according to double click of Leave Session menu. Setting menu lists are called from the array(submenus) so I compared with class name of menus, not index. Because the menu order can be changed.

Although my PR was merged, I'm going to test my logout process.

My first pull request at git repository.

I worked with HTML5 client logout from the second week of Jun.

After finished to implement, I tried to send pull request at git repository on last week.

However, I had some problem log-in part after I did git stash and fetch, merge from upstream/master branch.

According to console log, the meeting room could not be created and the 'validated' column of Users was set to false. When user logout, the user could not log out normally.


I could not find where the error was for the first time. However, I compared with the file from my laptop, I found the error. The error was in eventHandler.js at meeting.


Before merge with upstream/master, the code was..

eventEmitter.on('get_all_meetings_reply', function (arg) {


After merge with upstream/master, the code was changed to

eventEmitter.on('get_all_meetings_reply_message', function (arg) {

This message is coming from MessageNames at akka-bbb-apps, the version between mine and server was different.


After checking everything, I sent pull request at git repository for the first time.
I got comments a lot about my PR and I fixed everything.

Some of them was that I made files unnecessarily.
I divided every function in different files, especially the functions related to clear session and set the location when user logout.
But I put it together in Auth. 

I also set up dev_1.1 of bigbluebutton development environment.
And I'm implementing to open confirmation box when user do double click "Leave session"

SVG and Canvas in HTML5

SVG

• It stands for Scalable Vector Graphics.
• It is used to define graphics for the web.
• It is also define graphics of xml format so users can use text editor after create the svg images.
• It is built into the document using elements, attributes and styles.
• While SVG can be delivered as a standalone file, the initial focus is on its natural integration with HTML.
• Users can use text editor for svg.

<svg height="100" width="100">
  <circle cx="50" cy="50" r="40" stroke="black" stroke-width="3" fill="red" />
</svg>

The <height> and <width> attributes define the height and width of  the <svg> element.
The <circle> element is to draw a circle.
The <cx> and <cy> attributes are the x and y axis of the center of the circle.
The <r> attribute is radius of the circle.
The <stroke> is the color of the circle line and the <stroke-width> is the border of the line.
The <fill> is the color of the circle.


Canvas

• It is used to draw graphic.
• It present bitmap images with JavaScript. (pixel based)
• It is introduced by Apple for Safari, and other graphical widgets.
• The images in canvas are deleted after rendering to the browser. If the image is changed,  a user needs to re-invoke the image to draw a entire scene.

<canvas id="myCanvas" width="200" height="100" style="border:1px solid black;"> </canvas>
<script>
var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.beginPath();
ctx.arc(95,50,40,0,2*Math.PI);
ctx.stroke();
</script>

Working with new computer at three weeks in CDOT.

Tuesday : I got a new desktop computer on last Tuesday from professor and started to assemble my new computer. I assembled my computer and tried to install windows but it was stuck in the first step of installation. I thought computer is very slow to install windows so it had some problems.

Wednesday : I assembled my computer with another parts of computer and tried to install windows again. Fortunately, it worked and checked the update whole day.

Thursday : My computer didn't finish to check windows update when I turned on the computer. So I waited to finish it.

Friday : I started to set up the BBB's development environment on my new computer.
I changed "sudo npm install grunt-cli"at package.json.
Unfortunately, it showed the error when I run "./start.sh" at bigbluebutton-html5 directory.

Error was ..

  "react" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/user-list/chat-list-item/component.jsx (web.browser)

  "load-grunt-tasks" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/Gruntfile.js (web.browser)

  "react-dom" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/chat/message-list/component.jsx (web.browser)

  "react-router" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/user-list/chat-list-item/component.jsx (web.browser)

  "history" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/startup/client/routes.js (web.browser)

  "classnames" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/user-list/chat-list-item/component.jsx (web.browser)

  "underscore" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/button/component.jsx (web.browser)

  "react-intl" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/client/main.jsx (web.browser)

  "react-addons-css-transition-group" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/whiteboard/default-content/component.jsx (web.browser)

  "react-modal" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/modals/settings/submenus/SessionMenu.jsx (web.browser)

  "react-autosize-textarea" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/chat/message-form/component.jsx (web.browser)

  "classnames/bind" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/imports/ui/components/user-list/user-list-item/component.jsx (web.browser)

  "react-intl/locale-data/en" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/client/main.jsx (web.browser)

  "react-intl/locale-data/es" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/client/main.jsx (web.browser)

  "react-intl/locale-data/pt" in /home/firstuser/dev/bigbluebutton/bigbluebutton-html5/client/main.jsx (web.browser)

I just tried to clone my git repository again and my console showed another error when I run "npm install" according to the instruction.

Error was ..

  npm ERR! Error: EACCES, mkdir '/home/firstuser/tmp/npm-112557-pCIYTMRR'

  npm ERR!  { [Error: EACCES, mkdir '/home/firstuser/tmp/npm-112557-pCIYTMRR']

  npm ERR!   errno: 3,

  npm ERR!   code: 'EACCES',

  npm ERR!   path: '/home/firstuser/tmp/npm-112557-pCIYTMRR' }

  npm ERR!

  npm ERR! Please try running this command again as root/Administrator.

  npm ERR! System Linux 4.2.0-27-generic

  npm ERR! command "/usr/bin/nodejs" "/usr/bin/npm" "install"

  npm ERR! cwd /home/firstuser/dev/bigbluebutton/bigbluebutton-html5

  npm ERR! node -v v0.10.25

  npm ERR! npm -v 1.3.10

  npm ERR! path /home/firstuser/tmp/npm-112557-pCIYTMRR

  npm ERR! code EACCES

  npm ERR! errno 3

  npm ERR! stack Error: EACCES, mkdir '/home/firstuser/tmp/npm-112557-pCIYTMRR'

I tried to set up on my laptop on Sunday.
My laptop also had the same problem so I googled the solution.

Finally, I found the solution.
"npm install" was not correct.
"sudo npm install" is correct.

What a stupid I am!! OMG!!

softlock problem in VMware

When I turned on the VMware, it showed "soft lockup - CPU#1 stuck for 23s"

I tried to forced shutdown and then VMware seemed to work correctly.
Unfortunately, my VMware could not find an ip for my remote server.

I tried

sudo service networking restart
sudo /etc/init.d/network restart
sudo service network-manager restart


sudo ifdown eth0 && sudo ifup eth0


But this command showed "No DHCPOFFERS received." and "No working leases in persistent database - sleeping."


Finally I found the solution.
apt-get -o Acquire::ForceIPv4=true update