Render charts in Base64 format

[LxLeChat]

Pull Request [Topic]

Added new feature to New-PSHTMLChart. Add the ability to transform the charts to base64 img in the html (when the html is executed for the moment ... )

Please tell us , the type of Change you are submiting:

Select one of the following:

• Bug
• Feature
• Minor Change

Does it fix an existing issue? Please tell us which one

Related to the following issues: #221 #255 #220

Description of what's been changed

-Added a new switch tobase64 to the New-PSHTMLChart
-Added a new condition inside New-PSHTMLChartwhen ToBase64 is used. this will change the default value of the onComplete event of the current chart to this:

if ($tobase64) {
     $ChartOptions.animation.onComplete = 'RemoveCanvasAndCreateBase64Image'
}

-Added a ChartAnimation class to add the animation option for chartoptions
-Added a new GetDefinition override in the chart class, this override add a javascript function called RemoveCanvasAndCreateBase64Image. The function to transform the chart into a base64, then create a new img tag in place of the canvas and delete the script tag associated with the chart ( #255 ).

Results of your tests (If applicable)

No new test @ the moment, but i invite you to test on of your example i modified : 4charts.ps1 where all the new features proposed are exposed.

Edit:
@ the moment selnium is not implemented

[Stephanevg]

Plop @LxLeChat
J'ai regarder ton PR la, et y a qq tests qui on echoué (Ceux qui ce basent sur un string qui comportait l'object JSON de chartsjs.

Tu crois que tu peux les fixer avant que je merge?

gracias

[Stephanevg]

Awesome, Merci Mec @LxLeChat !!

[Stephanevg]

ça marche mieux quand on merge les trucs quand meme... ^^