haselse hack to enable or disable one link the opposite of the previous one

examples/codewords.gamebook

@@ -13,19 +13,22 @@ turn to [[the_end]]. If you do not have the codeword
 [hasnot code]fun[/hasnot], you may turn to [[notsofun]].
 If you have the codeword [has code]fun[/has], you may instead
 turn to [[cheater]].
-Otherwise see [[forced]].
+Otherwise see [[haselsetest]].
 
 * notsofun
 This is just to demonstrate choices allowed when not
-having a codeword. Now go on to [[forced]].
+having a codeword. Now go on to [[haselsetest]].
 
 * cheater
 Cheater! There is no way you can have codeword fun.
 
-* forced
-OK, if you have the codeword [has code]warrior[/has], turn to
-[[auto the_end]] otherwise go back to [[second]]. Although
+* haselsetest
+OK, if you have the codeword [haselse code]warrior[/has],
+you may turn to
+[[auto the_end]] otherwise you may go back to [[second]]. Although
 we both know you have that codeword.
+If you have the codeword [haselse code]fun[/has] you may turn
+to [[cheater]], without it you can go to [[notsofun]].
 
 * the_end
 That was easy.

templates/debug/haselse.debug

@@ -0,0 +1 @@
+[HAS ELSE %(arg1)s]%(inner)s[/HAS]

templates/html/begin.html

@@ -83,8 +83,9 @@
         },
 
         'runActions' : function(e) {
-            // FIXME handle auto links that must be followed if possible
             var enableNextLink = true;
+            var hasElseScope = false;
+            var hasElseEnable = false;
             Array.prototype.forEach.call(e.childNodes, function(c) {
                 if (/sectionref$/.test(c.className)) {
                     if (enableNextLink) {
@@ -92,7 +93,12 @@
                     } else {
                         gamebook.disableLink(c);
                     }
-                    enableNextLink = true;
+                    if (hasElseScope) {
+                        enableNextLink = hasElseEnable;
+                        hasElseScope = false;
+                    } else {
+                        enableNextLink = true;
+                    }
                 } else if (c.className === 'collect') {
                     gamebook.player.collect(c.dataset.type, c.dataset.name);
                 } else if (c.className === 'add') {
@@ -109,6 +115,11 @@
                                                           c.dataset.what);
                     console.log("has not " + c.dataset.type +
                                 " " + c.dataset.what + " " + enableNextLink);
+                } else if (c.className === 'haselse') {
+                    enableNextLink = gamebook.player.has(c.dataset.type,
+                                                         c.dataset.what);
+                    hasElseScope = true;
+                    hasElseEnable = !enableNextLink;
                 }
             });
         },

templates/html/haselse.html

@@ -0,0 +1,2 @@
+<span class="haselse" data-type="%(arg1)s"
+      data-what="%(inner)s">%(inner)s</span>

templates/tex/haselse.tex

@@ -0,0 +1 @@
+\textit{%(inner)s}

todo.org

@@ -1,4 +1,4 @@
-* TODO [24/48] [50%]
+* TODO [25/53] [47%]
 - [X] Debug output
 - [X] DOT output
 - [X] LaTeX output
@@ -27,7 +27,8 @@
 - [X] Make inventory and codewords generic
   They are the same, sort of, and it might be good to be able to
   add other similar entities as well, like skills or spells or whatever.
-- [ ] Otherwise/else handling for has (or has not).
+- [X] Otherwise/else handling for has.
+- [ ] Disable all links after finding an auto link (that is enabled).
 - [ ] Book option to set pdf layout (page size and number of columns)
 - [ ] Book option to set title
 - [ ] Book option to set author