NBash

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/*!
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 Cookie helper functions
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 Copyright (c) 2023 Dimitri van Heesch
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 Released under MIT license.
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*/
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let Cookie = {
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  cookie_namespace: 'doxygen_',
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  readSetting(cookie,defVal) {
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    if (window.chrome) {
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      const val = localStorage.getItem(this.cookie_namespace+cookie) ||
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                  sessionStorage.getItem(this.cookie_namespace+cookie);
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      if (val) return val;
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    } else {
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      let myCookie = this.cookie_namespace+cookie+"=";
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      if (document.cookie) {
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        const index = document.cookie.indexOf(myCookie);
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        if (index != -1) {
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          const valStart = index + myCookie.length;
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          let valEnd = document.cookie.indexOf(";", valStart);
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          if (valEnd == -1) {
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            valEnd = document.cookie.length;
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          }
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          return document.cookie.substring(valStart, valEnd);
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        }
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      }
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    }
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    return defVal;
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  },
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  writeSetting(cookie,val,days=10*365) { // default days='forever', 0=session cookie, -1=delete
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    if (window.chrome) {
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      if (days==0) {
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        sessionStorage.setItem(this.cookie_namespace+cookie,val);
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      } else {
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        localStorage.setItem(this.cookie_namespace+cookie,val);
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      }
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    } else {
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      let date = new Date();
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      date.setTime(date.getTime()+(days*24*60*60*1000));
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      const expiration = days!=0 ? "expires="+date.toGMTString()+";" : "";
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      document.cookie = this.cookie_namespace + cookie + "=" +
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                        val + "; SameSite=Lax;" + expiration + "path=/";
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    }
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  },
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  eraseSetting(cookie) {
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    if (window.chrome) {
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      if (localStorage.getItem(this.cookie_namespace+cookie)) {
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        localStorage.removeItem(this.cookie_namespace+cookie);
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      } else if (sessionStorage.getItem(this.cookie_namespace+cookie)) {
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        sessionStorage.removeItem(this.cookie_namespace+cookie);
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      }
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    } else {
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      this.writeSetting(cookie,'',-1);
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    }
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  },
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}
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