<br />
<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_7qjmq25jagh4rvmf7ne3l9ioh0, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
<br />
<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
!7

concept Domain {
  S domain;
  S moduleLibID;
  S proxyDestination;
  bool mustBeEnabled;
  
  toString { ret super.toString() + " " + domain; }
}

cmodule2 Eleu3 > DynEleu {
  transient CRUD<Domain> domainCRUD;
  switchable bool verbose;
  switchable bool debugNanoHTTPD;
  switchable S sameSite;
  
  start {
    NanoHTTPD_debug = debugNanoHTTPD;
    dbIndexingCI(Domain, 'domain);
    uniqCI Domain(domain := "<default>");
    domainCRUD = new CRUD(Domain);
    dm_registerAs eleuWithCRUD();
  }
  
  visualize {
    var c = jtabs(
     "Main", super.visualize(),
      "Domains" := domainCRUD.visualize());
      
    tablePopupMenu(domainCRUD.table(), voidfunc(JPopupMenu menu, int row) {
      Domain d = domainCRUD.selected(), ret if null;
      if (nempty(d.moduleLibID))
        addMenuItem(menu, "Load module", rThreadEnter { dm_makeOrShow(d.moduleLibID) });
    });
    
    ret c;
  }
  
  @Override 
  S moduleForDomain(S domain) {
    domain = dropAfterColon(domain); // drop port number
    for (Domain d : domainsInMatchingOrder()) {
      if (domainIsUnder_extended(domain, d.domain)) {
        S mod = findMod(d);
        if (verbose) print("Domain matched: " + domain + " / " + d.domain + " => " + mod); 
        try answer mod;
      } else
        if (verbose) print("Domain not matched: " + domain + " / " + d.domain); 
    }
    ret findMod(defaultDomain());
  }
  
  Domain defaultDomain() {
    ret conceptWhereCI Domain(domain := "<default>");
  }
  
  S findMod(Domain d) {
    if (d == null || empty(d.moduleLibID)) null;
    ret d.mustBeEnabled
      ? dm_findModuleWithParams(d.moduleLibID, enabled := true)
      : dm_findModule(d.moduleLibID);
  }

  ServeHttp_CookieHandler makeCookieHandler() {
    ServeHttp_CookieHandler cookieHandler = super.makeCookieHandler();
    cookieHandler.metaParams = appendPrefixIfNempty("SameSite=", sameSite);
    ret cookieHandler;
  }
  
  void onWebServersStarted :: after {
    forEach(webServers(), ws -> {
      ws.collectHeaderLines = true;
      
      // session is an instance of NanoHTTPD.IHTTPSession
      ws.specialHandling = session -> {
        S domain = mapGet(session.getHeaders(), "host");

        Domain d = first(domainsInMatchingOrder(), 
          _d -> domainIsUnder_extended(domain, _d.domain));
          
        if (d == null || empty(d.proxyDestination)) false;
        print("Handling proxy request to " + d.proxyDestination);
        HostAndPort hap = new(d.proxyDestination);
        
        new StandaloneHttpProxy proxy;
        proxy.forwardServerAndPort = req -> hap;
        proxy.takeOverIncomingSocket(session.getSocket(),
          session.getInputStream(),
          session.getOutputStream(),
          session.getMethod() + " " + session.getUri() + " " + session.getProtocolVersion(),
          toUTf8(windowsLineBreaks(lines(session.getHeaderLines()))));
        true;
      };
    });
  } // onWebServersStarted

  // API
  
  Cl<Domain> domainsInMatchingOrder() {
    ret sortByCalculatedFieldICDesc(
      filter(list(Domain), d -> !eqic(d.domain, "<default>")),
      d -> reversed(d.domain));
  }
  
  void addDomain(S domain, S moduleLibID, bool mustBeEnabled) {
    uniq Domain(+domain, +moduleLibID, +mustBeEnabled);
  }
}