Make i18n URL query parameter name configurable and add support for path variable.

[jeevatkm]

Bringing more then one options of internationalization and localization override. Default is based on HTTP header Accept-Language. However real world usage requires overrides too.

aah framework provides override via -

• Path Variable: i.e. /:lang/home.html, /:lang/aboutus.html, etc.
  * For e.g.: /en/home.html, /en/aboutus.html, /zh-CN/home.html, /zh-CN/aboutus.html etc.
• Query Parameter: i.e ?lang=en, ?lang=zh-CN, etc. This is already supported, just we have to make param name configurable.

Note: Query parameter takes precedence of all.

aah.conf:

i18n {
    param_name {
        # Default value is `lang`
        path = "locale"

        # Default value is `lang`
        query = "locale"
    }
}

• app template
• Documentation

[adelowo]

I don't understand the second item on the checklist.. Can you explain that better ?

[jeevatkm]

I have update the design description. Path variable value is accessible via ctx.Req.PathValue("lang").

[adelowo]

Ok, I see you updated the config structure (from i18n.url_param_name)..

[jeevatkm]

You no need to close #73, continue to update and push changes to the same PR.

[adelowo]

@jeevatkm can you work on the "path variable".. I wouldn't be chanced to do much for some days. Maybe you pick up #73 from it's current state

[jeevatkm]

No issues, I will take care, Thanks.