Change users language preference with REST API

Hi heavenerp,

I had completed a similar function weeks ago with Endpoint (like what PaoloT  mentioned). more details can be found with http://lithosphere.lithium.com/t5/developers-discussion/Get-language-setting-of-current-node/m-p/128715#M4922

this week, I realised that there could be a simpler approach with "Page Initalization" (more details with Page Initalization can be found with http://lithosphere.lithium.com/t5/developers-discussion/Is-it-possible-to-make-a-redirect-with-REST-or-Freemarker/m-p/123591#M4666), after some simple test, I found that it works.

in short, we can just use the same hyperlink as you did for non-logged in users.

<a href="/t5/help/faqpage?profile.language=de">Click here to read this page in German</a>

and in "Page Initalization", you can have something like this

<#assign lang = http.request.parameters.name.get("profile.language", "")?trim />
<#if user.registered && lang?has_content && (lang?length > 0) >
    <#assign cur_lang = settings.name.get("profile.language", "") />
    <#if cur_lang != lang >
        <#assign update_lang_setting = rest("/users/self/profiles/name/language/set?value=${lang}") />
        ${http.response.setRedirectUrl(http.request.url)}
        <#-- Refresh the URL -->
    </#if>
</#if>

note: http.response.setRedirectUrl is necessary as we need to re-load the language in user session.

I hope that this helps.