feat: support legacy tag

src/main/java/com/bladecoder/ink/runtime/Story.java

@@ -462,6 +462,11 @@ List<String> tagsAtStartOfFlowContainerWithPathString(String pathString) throws
                             + ".Continue().");
                 }
             }
+            // Legacy Tag
+            else if ( c instanceof Tag ) {
+                if (tags == null) tags = new ArrayList<>();
+                tags.add(((Tag) c).getText());
+            }
 
             // Any other content - we're done
             // We only recognise initial text-only tags

src/test/java/com/bladecoder/ink/runtime/test/TagSpecForV20Test.java

@@ -0,0 +1,59 @@
+package com.bladecoder.ink.runtime.test;
+
+import com.bladecoder.ink.runtime.Story;
+import java.util.List;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class TagSpecForV20Test {
+
+    /**
+     * "- basic test for tags"
+     */
+    @Test
+    public void testTags() throws Exception {
+
+        String json = TestUtils.getJsonString("inkfiles/tags/v20/tags.ink.json");
+        Story story = new Story(json);
+
+        String[] globalTags = {"author: Joe", "title: My Great Story"};
+        String[] knotTags = {"knot tag"};
+        String[] knotTagWhenContinuedTwice = {"end of knot tag"};
+        String[] stitchTags = {"stitch tag"};
+
+        Assert.assertArrayEquals(globalTags, story.getGlobalTags().toArray());
+
+        Assert.assertEquals("This is the content\n", story.Continue());
+
+        Assert.assertArrayEquals(globalTags, story.getCurrentTags().toArray());
+
+        Assert.assertArrayEquals(knotTags, story.tagsForContentAtPath("knot").toArray());
+        Assert.assertArrayEquals(
+            stitchTags, story.tagsForContentAtPath("knot.stitch").toArray());
+
+        story.choosePathString("knot");
+        Assert.assertEquals("Knot content\n", story.Continue());
+        Assert.assertArrayEquals(knotTags, story.getCurrentTags().toArray());
+        Assert.assertEquals("", story.Continue());
+        Assert.assertArrayEquals(
+            knotTagWhenContinuedTwice, story.getCurrentTags().toArray());
+    }
+
+    @Test
+    public void testTagsInChoice() throws Exception {
+
+        String json = TestUtils.getJsonString("inkfiles/tags/v20/tagOnChoice.ink.json");
+        Story story = new Story(json);
+
+        story.Continue();
+        story.chooseChoiceIndex(0);
+
+        String txt = story.Continue();
+        List<String> tags = story.getCurrentTags();
+
+        Assert.assertEquals("Hello", txt);
+        Assert.assertEquals(1, tags.size());
+        Assert.assertEquals("hey", tags.get(0));
+    }
+
+}

src/test/resources/inkfiles/tags/v20/tagOnChoice.ink

@@ -0,0 +1 @@
+* [Hi] Hello -> END #hey

src/test/resources/inkfiles/tags/v20/tagOnChoice.ink.json

@@ -0,0 +1 @@
+{"inkVersion":20,"root":[["ev","str","^Hi","/str","/ev",{"*":"0.c-0","flg":20},{"c-0":["^ Hello ",{"#":"hey"},"end","\n",{"->":"0.g-0"},{"#f":5}],"g-0":["done",null]}],"done",null],"listDefs":{}}

src/test/resources/inkfiles/tags/v20/tags.ink

@@ -0,0 +1,16 @@
+VAR x = 2 
+# author: Joe
+# title: My Great Story
+This is the content
+
+== knot ==
+# knot tag
+Knot content
+# end of knot tag
+-> END
+
+= stitch
+# stitch tag
+Stitch content
+# this tag is below some content so isn't included in the static tags for the stitch
+-> END

src/test/resources/inkfiles/tags/v20/tags.ink.json

@@ -0,0 +1 @@
+{"inkVersion":20,"root":[[{"#":"author: Joe"},{"#":"title: My Great Story"},"^This is the content","\n",["done",{"#n":"g-0"}],null],"done",{"knot":[{"#":"knot tag"},"^Knot content","\n",{"#":"end of knot tag"},"end",{"stitch":[{"#":"stitch tag"},"^Stitch content","\n",{"#":"this tag is below some content so isn't included in the static tags for the stitch"},"end",null]}],"global decl":["ev",2,{"VAR=":"x"},"/ev","end",null]}],"listDefs":{}}