Pass the backend type into a Command -fixes #104

[ChrisLGardner]

Description

Some systems like Teams will not automatically expand some output, like image links so sending them markdown instead of a plain link will correct this to enable this behaviour we need to be able to let other plugins know which backend it is talking to. Using $Global:PoshbotContext.BackendType will enable this.

I used the name of the backend as I didn't want to pass the whole Backend in when it wasn't really needed.

Related Issue

#104

How Has This Been Tested?

Tested with the xkcd plugin and using this code. Built locally and tested with Teams. I don't have a slack workspace to test it with but I can't see why it won't work. I'll submit a PR to PoshBot.xkcd as well with this fix.

if ($Global:PoshbotContext.BackendType -eq 'TeamsBackend') {
                    "![img]($($comic.img))"
                }
                else {
                    $Comic.img
                }

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[ChrisLGardner]

Made a quick fix to tidy up the casing on _bot and add .Name since I'd missed it from one of the Invoke calls.

[devblackops]

@ChrisLGardner I think this should be $this._Bot.Backend.GetType().Name so it returns the actual class type instead of the arbitrary Name that you can set on the backend. That way, it will be consistent for people who want to use it from the SlackBackend or TeamsBackend backend classes.

[devblackops]

Awesome. Thanks!

[devblackops]

I think this should be $this._Bot.Backend.GetType().Name (which will always return SlackBackend or TeamsBackend for the builtin backends. Relying on $this._bot.Backend.Name will prove inconsistent because that value is settable by the user when they create an instance of a backend and can be whatever value they want. See below:

$backend = New-PoshBotSlackBackend -Configuration @{
    Name  = 'MyAwesomeSlackBackend'
    Token = 'SUPER SECRET'
}

[devblackops]

Same answer as above