// inhouse_slideshow.js
// RJM Programming
// January, 2022
// Help out with ephemeral aspects to Inhouse Slideshow PHPs


if (!String.fromCodePoint) {   // thanks to http://xahlee.info/js/js_unicode_code_point.html
// ES6 Unicode Shims 0.1 , © 2012 Steven Levithan , MIT License
    String.fromCodePoint = function fromCodePoint () {
        var chars = [], point, offset, units, i;
        for (i = 0; i < arguments.length; ++i) {
            point = arguments[i];
            offset = point - 0x10000;
            units = point > 0xFFFF ? [0xD800 + (offset >> 10), 0xDC00 + (offset & 0x3FF)] : [point];
            chars.push(String.fromCharCode.apply(null, units));
        }
        return chars.join('');
    }
}
 
 function changeto(tvis) {
   if (tvis.toLowerCase().indexOf('exif') == 0) {
    if (document.URL.indexOf('?') == -1) { 
     location.href=posturl(document.URL.split('#')[0] + '?exif=y');
    } else {
     location.href=posturl(document.URL.split('#')[0].replace(/pdf\=/g, 'pdTf=') + '&exif=y');
    }
   } else if (tvis.toLowerCase().indexOf('pdf') == 0) {
    if (document.URL.indexOf('?') == -1) { 
     location.href=posturl(document.URL.split('#')[0] + '?pdf=y');
    } else {
     location.href=posturl(document.URL.split('#')[0].replace(/exif\=/g, 'exTif=') + '&pdf=y');
    }
   } else if (tvis.toLowerCase().indexOf('emoji') == 0) {
    //var borderis=prompt('Please enter comma separated HTML decimal entity(s) for your Emoji Border to slideshow.  Can use an Emoji Menu entry.', '');
    var bbsuffix='   Optionally append &[text|image]css=[CSSstyle] to change styling.  Eg. ' + String.fromCodePoint(127958) + '&css=opacity:0.9;&textcss=font-size:20px; ';
    borderblurb='Please enter comma separated HTML decimal entity(s) for your Emoji Border to slideshow. Can use an Emoji Menu entry (eg. control-command-space for macOS or Mac OS X, logo key + . (period) for Windows, control+space for iOS, top left + for Android keyboard). ' + bbsuffix;
    var borderis=prompt(borderblurb, '');
    var emojiy='', emojisuffix='';
    if (borderis == null) { 
      borderis=''; 
    } else if (borderis.indexOf('&') != -1) { 
      if (borderis.split('&')[0].trim() == '') {
      emojisuffix=encodeURIComponent(borderis); //.replace(/\&/g,'%26').replace(/\=/g,'%3D');
      borderis='';
      } else {
      emojisuffix=encodeURIComponent(borderis.replace(borderis.split('&')[0], '')); //.replace(/\&/g,'%26').replace(/\=/g,'%3D');
      borderis=postbb(borderis.split('&')[0]); 
      }
    } else { 
      borderis=postbb(borderis.split('&')[0]); 
    }
    if ((borderis + emojisuffix) != '') { emojiy='emoji=' + encodeURIComponent(borderis) + emojisuffix; }  
    if (emojiy != '') {
    if (document.URL.indexOf('?') == -1) { 
     location.href=posturl(document.URL.split('#')[0] + '?' + emojiy);
    } else {
     location.href=posturl(document.URL.split('#')[0].replace(/emoji\=/g, 'emojTi=') + '&' + emojiy);
    }
    }
   } else {
    if (document.URL.indexOf('exif=') != -1 || document.URL.indexOf('pdf=') != -1) { 
     location.href=posturl(document.URL.split('#')[0].replace(/exif\=/g, 'exTif=').replace(/pdf\=/g, 'pdTf='));
    } else {
     location.href=posturl(document.URL.split('#')[0] + '&eHuhxif=y');
    }
   }
 }
     
 function postbb(inp) {
   if (inp != '' && inp.replace(/0/g,'').replace(/1/g,'').replace(/2/g,'').replace(/3/g,'').replace(/4/g,'').replace(/5/g,'').replace(/6/g,'').replace(/7/g,'').replace(/8/g,'').replace(/9/g,'').replace(/\&/g,'').replace(/\#/g,'').replace(/\;/g,'').replace(/\,/g,'') != '') {
     return inp;
   } else if (inp != '' && inp.replace(/0/g,'').replace(/1/g,'').replace(/2/g,'').replace(/3/g,'').replace(/4/g,'').replace(/5/g,'').replace(/6/g,'').replace(/7/g,'').replace(/8/g,'').replace(/9/g,'').replace(/\,/g,'') == '') {
     if (eval('' + inp.split(',').length) >= 4) {
       eval('inp=String.fromCodePoint(' + inp + ')');
     }
     return inp;
   } else if (inp != '' && inp.replace(/0/g,'').replace(/1/g,'').replace(/2/g,'').replace(/3/g,'').replace(/4/g,'').replace(/5/g,'').replace(/6/g,'').replace(/7/g,'').replace(/8/g,'').replace(/9/g,'').replace(/\&/g,'').replace(/\#/g,'').replace(/\;/g,'') == '') {
     var outp=inp.replace(/\&\#/g,',').replace(/\;/g,',');
     outp=outp.trim(',');
     outp=outp.replace(/\,\,\,\,/g,',');
     outp=outp.replace(/\,\,\,/g,',');
     outp=outp.replace(/\,\,/g,',');
     outp=outp.trim(',');
     outp=('~' + outp + '~').replace('~,','').replace(',~','').replace(/\~/g,'');
     if (eval('' + outp.split(',').length) >= 4) {
       eval('outp=String.fromCodePoint(' + outp + ')');
     }
     return outp;
   }
   //alert(String.fromHtmlEntities(inp));
   //alert(inp.toHtmlEntities());
   return inp;
 }
 
 function posturl(inpu) {
   return inpu;
 }