17 files changed, 623 insertions, 30 deletions
diff --git a/.idea/checkstyle-idea.xml b/.idea/checkstyle-idea.xml
index 551b800..eda52d4 100644
--- a/.idea/checkstyle-idea.xml
+++ b/.idea/checkstyle-idea.xml
@@ -1,18 +1,18 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="CheckStyle-IDEA">
-    <option name="configuration">
-      <map>
-        <entry key="active-configuration" value="PROJECT_RELATIVE:$PROJECT_DIR$/checkstyle.xml:CPSC 210 Checkstyle" />
-        <entry key="checkstyle-version" value="8.18" />
-        <entry key="copy-libs" value="false" />
-        <entry key="location-0" value="BUNDLED:(bundled):Sun Checks" />
-        <entry key="location-1" value="BUNDLED:(bundled):Google Checks" />
-        <entry key="location-2" value="PROJECT_RELATIVE:$PROJECT_DIR$/checkstyle.xml:CPSC 210 Checkstyle" />
-        <entry key="scan-before-checkin" value="false" />
-        <entry key="scanscope" value="JavaOnly" />
-        <entry key="suppress-errors" value="false" />
-      </map>
+  <component name="CheckStyle-IDEA" serialisationVersion="2">
+    <checkstyleVersion>8.18</checkstyleVersion>
+    <scanScope>JavaOnly</scanScope>
+    <option name="thirdPartyClasspath" />
+    <option name="activeLocationIds">
+      <option value="5ed4fe78-33b5-4a2f-9159-da0cbae12bec" />
+    </option>
+    <option name="locations">
+      <list>
+        <ConfigurationLocation id="bundled-sun-checks" type="BUNDLED" scope="All" description="Sun Checks">(bundled)</ConfigurationLocation>
+        <ConfigurationLocation id="bundled-google-checks" type="BUNDLED" scope="All" description="Google Checks">(bundled)</ConfigurationLocation>
+        <ConfigurationLocation id="5ed4fe78-33b5-4a2f-9159-da0cbae12bec" type="PROJECT_RELATIVE" scope="All" description="CPSC 210 Checkstyle">$PROJECT_DIR$/checkstyle.xml</ConfigurationLocation>
+      </list>
     </option>
   </component>
 </project>
 \ No newline at end of file
diff --git a/.idea/libraries/javatuples.xml b/.idea/libraries/javatuples.xml
new file mode 100644
index 0000000..adca311
--- /dev/null
+++ b/.idea/libraries/javatuples.xml
@@ -0,0 +1,12 @@
+<component name="libraryTable">
+  <library name="javatuples" type="repository">
+    <properties maven-id="org.javatuples:javatuples:1.2" />
+    <CLASSES>
+      <root url="jar://$MAVEN_REPOSITORY$/org/javatuples/javatuples/1.2/javatuples-1.2.jar!/" />
+    </CLASSES>
+    <JAVADOC>
+      <root url="jar://$MAVEN_REPOSITORY$/org/javatuples/javatuples/1.2/javatuples-1.2-javadoc.jar!/" />
+    </JAVADOC>
+    <SOURCES />
+  </library>
+</component>
+\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
index 7ac8932..7045e98 100644
--- a/.idea/modules.xml
+++ b/.idea/modules.xml
@@ -2,7 +2,7 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/Project-Starter.iml" filepath="$PROJECT_DIR$/Project-Starter.iml" />
+      <module fileurl="file://$PROJECT_DIR$/apus.iml" filepath="$PROJECT_DIR$/apus.iml" />
     </modules>
   </component>
 </project>
 \ No newline at end of file
diff --git a/.idea/uiDesigner.xml b/.idea/uiDesigner.xml
new file mode 100644
index 0000000..2b63946
--- /dev/null
+++ b/.idea/uiDesigner.xml
@@ -0,0 +1,124 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Palette2">
+    <group name="Swing">
+      <item class="com.intellij.uiDesigner.HSpacer" tooltip-text="Horizontal Spacer" icon="/com/intellij/uiDesigner/icons/hspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="1" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="com.intellij.uiDesigner.VSpacer" tooltip-text="Vertical Spacer" icon="/com/intellij/uiDesigner/icons/vspacer.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="1" anchor="0" fill="2" />
+      </item>
+      <item class="javax.swing.JPanel" icon="/com/intellij/uiDesigner/icons/panel.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JScrollPane" icon="/com/intellij/uiDesigner/icons/scrollPane.svg" removable="false" auto-create-binding="false" can-attach-label="true">
+        <default-constraints vsize-policy="7" hsize-policy="7" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JButton" icon="/com/intellij/uiDesigner/icons/button.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="0" fill="1" />
+        <initial-values>
+          <property name="text" value="Button" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JRadioButton" icon="/com/intellij/uiDesigner/icons/radioButton.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="RadioButton" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JCheckBox" icon="/com/intellij/uiDesigner/icons/checkBox.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="3" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="CheckBox" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JLabel" icon="/com/intellij/uiDesigner/icons/label.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="8" fill="0" />
+        <initial-values>
+          <property name="text" value="Label" />
+        </initial-values>
+      </item>
+      <item class="javax.swing.JTextField" icon="/com/intellij/uiDesigner/icons/textField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JPasswordField" icon="/com/intellij/uiDesigner/icons/passwordField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JFormattedTextField" icon="/com/intellij/uiDesigner/icons/formattedTextField.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1">
+          <preferred-size width="150" height="-1" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextArea" icon="/com/intellij/uiDesigner/icons/textArea.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTextPane" icon="/com/intellij/uiDesigner/icons/textPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JEditorPane" icon="/com/intellij/uiDesigner/icons/editorPane.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JComboBox" icon="/com/intellij/uiDesigner/icons/comboBox.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="2" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JTable" icon="/com/intellij/uiDesigner/icons/table.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JList" icon="/com/intellij/uiDesigner/icons/list.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="2" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTree" icon="/com/intellij/uiDesigner/icons/tree.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3">
+          <preferred-size width="150" height="50" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JTabbedPane" icon="/com/intellij/uiDesigner/icons/tabbedPane.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSplitPane" icon="/com/intellij/uiDesigner/icons/splitPane.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="3" hsize-policy="3" anchor="0" fill="3">
+          <preferred-size width="200" height="200" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JSpinner" icon="/com/intellij/uiDesigner/icons/spinner.svg" removable="false" auto-create-binding="true" can-attach-label="true">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSlider" icon="/com/intellij/uiDesigner/icons/slider.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="8" fill="1" />
+      </item>
+      <item class="javax.swing.JSeparator" icon="/com/intellij/uiDesigner/icons/separator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="6" anchor="0" fill="3" />
+      </item>
+      <item class="javax.swing.JProgressBar" icon="/com/intellij/uiDesigner/icons/progressbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JToolBar" icon="/com/intellij/uiDesigner/icons/toolbar.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="6" anchor="0" fill="1">
+          <preferred-size width="-1" height="20" />
+        </default-constraints>
+      </item>
+      <item class="javax.swing.JToolBar$Separator" icon="/com/intellij/uiDesigner/icons/toolbarSeparator.svg" removable="false" auto-create-binding="false" can-attach-label="false">
+        <default-constraints vsize-policy="0" hsize-policy="0" anchor="0" fill="1" />
+      </item>
+      <item class="javax.swing.JScrollBar" icon="/com/intellij/uiDesigner/icons/scrollbar.svg" removable="false" auto-create-binding="true" can-attach-label="false">
+        <default-constraints vsize-policy="6" hsize-policy="0" anchor="0" fill="2" />
+      </item>
+    </group>
+  </component>
+</project>
+\ No newline at end of file
diff --git a/Project-Starter.iml b/apus.iml
index 08bb910..19129c3 100644
--- a/Project-Starter.iml
+++ b/apus.iml
@@ -1,9 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module type="JAVA_MODULE" version="4">
-  <component name="CheckStyle-IDEA-Module">
-    <option name="configuration">
-      <map />
-    </option>
+  <component name="CheckStyle-IDEA-Module" serialisationVersion="2">
+    <option name="activeLocationsIds" />
   </component>
   <component name="NewModuleRootManager" inherit-compiler-output="true">
     <exclude-output />
@@ -29,5 +27,6 @@
         <SOURCES />
       </library>
     </orderEntry>
+    <orderEntry type="library" name="javatuples" level="project" />
   </component>
 </module>
 \ No newline at end of file
diff --git a/data/example.css b/data/example.css
new file mode 100644
index 0000000..dd93d52
--- /dev/null
+++ b/data/example.css
@@ -0,0 +1,25 @@
+body {
+    background-color: #f0f0f2;
+    margin: 0;
+    padding: 0;
+    font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
+    
+}
+div {
+    width: 600px;
+    margin: 5em auto;
+    padding: 2em;
+    background-color: #fdfdff;
+    border-radius: 0.5em;
+    box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
+}
+a:link, a:visited {
+    color: #38488f;
+    text-decoration: none;
+}
+@media (max-width: 700px) {
+    div {
+        margin: 0 auto;
+        width: auto;
+    }
+}
diff --git a/data/example.html b/data/example.html
new file mode 100644
index 0000000..b62fc42
--- /dev/null
+++ b/data/example.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Example Domain</title>
+
+    <meta charset="utf-8" />
+    <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <style type="text/css">
+    body {
+        background-color: #f0f0f2;
+        margin: 0;
+        padding: 0;
+        font-family: -apple-system, system-ui, BlinkMacSystemFont, "Segoe UI", "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
+
+    }
+    div {
+        width: 600px;
+        margin: 5em auto;
+        padding: 2em;
+        background-color: #fdfdff;
+        border-radius: 0.5em;
+        box-shadow: 2px 3px 7px 2px rgba(0,0,0,0.02);
+    }
+    a:link, a:visited {
+        color: #38488f;
+        text-decoration: none;
+    }
+    @media (max-width: 700px) {
+        div {
+            margin: 0 auto;
+            width: auto;
+        }
+    }
+    </style>
+</head>
+
+<body>
+<div>
+    <h1>Example Domain</h1>
+    <p>This domain is for use in illustrative examples in documents. You may use this
+        domain in literature without prior coordination or asking for permission.</p>
+    <p><a href="https://www.iana.org/domains/example">More information...</a></p>
+</div>
+</body>
+</html>
diff --git a/data/example.md b/data/example.md
new file mode 100644
index 0000000..45b29de
--- /dev/null
+++ b/data/example.md
@@ -0,0 +1,39 @@
+Heading
+=======
+
+Sub-heading
+-----------
+
+# Alternative heading #
+
+Paragraphs are separated
+by a blank line.
+
+Two spaces at the end of a line  
+produce a line break.
+
+Text attributes _italic_, **bold**, `monospace`.
+
+Horizontal rule:
+
+---
+
+Bullet lists nested within numbered list:
+
+1. fruits
+    * apple
+    * banana
+2. vegetables
+    - carrot
+    - broccoli
+
+A [link](http://example.com).
+
+![Image](Icon-pictures.png "icon")
+
+> Markdown uses email-style
+characters for blockquoting.
+>
+> Multiple paragraphs need to be prepended individually.
+
+Most inline <abbr title="Hypertext Markup Language">HTML</abbr> tags are supported.
+\ No newline at end of file
diff --git a/data/tobs.jpg b/data/tobs.jpg
deleted file mode 100644
index f1652ef..0000000
--- a/data/tobs.jpg
+++ /dev/null
diff --git a/src/main/model/MyModel.java b/src/main/model/MyModel.java
deleted file mode 100644
index f9a3dd7..0000000
--- a/src/main/model/MyModel.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package model;
-
-public class MyModel {
-    // delete or rename this class!
-}
diff --git a/src/main/model/css/CssLexer.java b/src/main/model/css/CssLexer.java
new file mode 100644
index 0000000..657d3e1
--- /dev/null
+++ b/src/main/model/css/CssLexer.java
@@ -0,0 +1,63 @@
+package model.css;
+
+import java.util.ArrayList;
+
+/**
+ * This lexer splits an input by whitespace, brackets, and semicolons.
+ * Brackets and semicolons are included in the lexed output, whitespace is not.
+ * <br>
+ * CSS, thankfully, is far more rigid and less-forgiving of errors than HTMl.
+ * It also has multiple layers of fallback for errors: ranging from: "ignore this
+ * property", to "ignore this rule", to "this isn't fucking CSS" and ignore it all.
+ * <br>
+ * Still, even though we don't have to deal with garbage like escaped quotes (future edit: whoops, yes we do) and
+ * what not, we'll still implement our lexer with a for loop instead of split() for future optimizations.
+ */
+public class CssLexer {
+
+    public static ArrayList<String> lex(String input) {
+        String token = "";
+        ArrayList<String> tokens = new ArrayList<>();
+        boolean inSingleQuotes = false;
+        boolean inDoubleQuotes = false;
+        char previous = '\0';
+
+        for (char i : input.toCharArray()) {
+            // i HATE fallthrough switch statements
+            switch (i) {
+                case '{': case '}': case ';': case ':':
+                case ' ': case '\n': case '\t':
+                    if (!inSingleQuotes && !inDoubleQuotes) {
+                        if (!token.equals("")) {
+                            tokens.add(token);
+                            token = "";
+                        }
+                        switch (i) {
+                            case '{': case '}': case ';': case ':':
+                                tokens.add(Character.toString(i));
+                                break;
+                            case ' ': case '\n': case '\t':
+                                break;
+                        }
+                    } else {
+                        token += i;
+                    }
+                    break;
+                // intentional use of footgun behavior
+                case '"':
+                    if (previous != '\\') {
+                        inDoubleQuotes = !inDoubleQuotes;
+                    }
+                case '\'':
+                    if (previous != '\\') {
+                        inSingleQuotes = !inSingleQuotes;
+                    }
+                default:
+                    token += i;
+                    break;
+            }
+            previous = i;
+        }
+        return tokens;
+    }
+}
diff --git a/src/main/model/html/HtmlLexer.java b/src/main/model/html/HtmlLexer.java
new file mode 100644
index 0000000..8cad425
--- /dev/null
+++ b/src/main/model/html/HtmlLexer.java
@@ -0,0 +1,68 @@
+package model.html;
+
+import java.util.ArrayList;
+
+/**
+ * We'll tokenize HTML by tags: disregarding the contents of the tag and attributes within the tag.
+ * The file is also considered to be free-form here: whitespace duplicates are disregarded.
+ */
+public class HtmlLexer {
+
+    // Takes a String of raw HTML, and tokenizes it for our parser.
+    public static ArrayList<String> lex(String input) {
+        String token = "";
+        ArrayList<String> tokens = new ArrayList<>();
+        boolean inTag = false;
+        boolean inSingleQuotes = false;
+        boolean inDoubleQuotes = false;
+
+        for (char i : input.toCharArray()) {
+            token += i;
+            switch (i) {
+                case '<':
+                    if (!inSingleQuotes && !inDoubleQuotes) {
+                        inTag = true;
+                        if (!token.equals("<")) {
+                            tokens.add(token.substring(0, token.length() - 1));
+                            token = "<";
+                        }
+                    } else if (inTag) {
+                        System.out.printf("Probably failing parser");
+                    }
+                    break;
+                case '>':
+                    if (!inSingleQuotes && !inDoubleQuotes) {
+                        if (!inTag) {
+                            System.out.printf("Probably failing parser");
+                        }
+                        inTag = false;
+                        tokens.add(token);
+                        token = "";
+                    }
+                    break;
+                case '"':
+                    if (!inSingleQuotes) {
+                        inDoubleQuotes = !inDoubleQuotes;
+                    }
+                    break;
+                case '\'':
+                    if (!inDoubleQuotes) {
+                        inSingleQuotes = !inSingleQuotes;
+                    }
+                    break;
+            }
+        }
+        /**
+         * When lexing invalid HTML: we may end up with trailing garbage: either an unfinished tag or extra text
+         * (those are the only two options since this is just the lex step)
+         */
+        if (!token.equals("")) {
+            if (inTag) {
+                tokens.add(token + ">");
+            } else {
+                tokens.add(token);
+            }
+        }
+        return tokens;
+    }
+}
diff --git a/src/main/model/util/AbstractTree.java b/src/main/model/util/AbstractTree.java
new file mode 100644
index 0000000..4c74732
--- /dev/null
+++ b/src/main/model/util/AbstractTree.java
@@ -0,0 +1,35 @@
+package model.util;
+
+import org.javatuples.*;
+
+import java.util.*;
+
+// Utility class for a general tree: we'll be using these a lot
+public abstract class AbstractTree<T> {
+
+    // An AbstractTree holds some kind of data; we'll want this to be generic
+    // e.g. a tag, attributes, a tag and attributes, etc
+    private T data;
+    // Since it's a tree every node also has children.
+    private ArrayList<AbstractTree<T>> children;
+
+    // future implementations may want to consider adding an Optional<> parent; or an Optional<> prevSibling
+
+    public T getData() {
+        return data;
+    }
+
+    public ArrayList<AbstractTree<T>> getChildren() {
+        return children;
+    }
+
+    // god so much boilerplate
+    public AbstractTree(T data, ArrayList<AbstractTree<T>> children) {
+        this.data = data;
+        this.children = children;
+    }
+
+    public void addChild(AbstractTree<T> child) {
+        this.children.add(child);
+    }
+}
diff --git a/src/main/model/util/Lexer.java b/src/main/model/util/Lexer.java
new file mode 100644
index 0000000..b35caa6
--- /dev/null
+++ b/src/main/model/util/Lexer.java
@@ -0,0 +1,58 @@
+package model.util;
+
+import java.util.*;
+
+// General-purpose Lexer
+public class Lexer {
+
+    // private static final Set<String> whitespace = new HashSet<String>(" ", "\n");
+
+    // unused, helper function for if we implement finding identifers longer than a character
+    private static int longestDelimiter(Set<String> delimiters) {
+        int longestDelimiter = 0;
+        for (String delimiter : delimiters) {
+            if (delimiter.length() > longestDelimiter) {
+                longestDelimiter = delimiter.length();
+            }
+        }
+        return longestDelimiter;
+    }
+
+    /**
+     * Lexes a "free-form" language. "free-form" has a specific meaning here that's important to preserve:
+     * "free-form" means that _additional_ whitespace characters do not affect the language: e.g. two newlines
+     * instead of one, four spaces instead of two, etc. They are _not_ "whitespace-insensitive", which is usually
+     * a misnomer.
+     * The name's a bit of a joke: free-form languages are generally referred to as whitespace-insensitive -->
+     * insensitive == rude. Jokes are funnier when you have to explain them.
+     * Also, insensitiveLex() and freeformLex() aren't really that good of names.
+     *
+     * NOTE: This lexer only works with single-character deliminators.
+     * TODO: deduplicate whitespace
+     */
+    // public static ArrayList<String> rudeLex(String input, Set<Character> delimiters) {}
+
+    /**
+     * We might as well implement a lexer for non-free-form languages, but whatever. We won't use it.
+     */
+    public static ArrayList<String> sensitiveLex(String input, Set<Character> delimiters) {
+        // int longestDelimiter = longestDelimiter(delimiters);
+
+        ArrayList<String> tokens = new ArrayList<String>();
+        String currentToken = "";
+        // terrible c-style for loop because we may need to manipulate the index in the future
+        for (int i = 0; i < input.length(); i++) {
+            char nextToken = input.charAt(i);
+            if (delimiters.contains(nextToken)) {
+                if (!currentToken.equals("")) {
+                    tokens.add(currentToken);
+                }
+                tokens.add(Character.toString(nextToken));
+                currentToken = "";
+            } else {
+                currentToken += input.charAt(i);
+            }
+        }
+        return tokens;
+    }
+}
diff --git a/src/test/model/CssLexerTest.java b/src/test/model/CssLexerTest.java
new file mode 100644
index 0000000..4ed28e2
--- /dev/null
+++ b/src/test/model/CssLexerTest.java
@@ -0,0 +1,67 @@
+package model;
+
+import model.css.CssLexer;
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class CssLexerTest {
+
+    @Test
+    void testIdiomaticHtml() {
+        try {
+            String idiomaticCss = Files.readString(Path.of("data/example.css"));
+            String[] expected = {"body", "{", "background-color", ":", "#f0f0f2", ";", "margin", ":", "0", ";", "padding", ":", "0", ";", "font-family", ":", "-apple-system,", "system-ui,", "BlinkMacSystemFont,", "\"Segoe UI\",", "\"Open Sans\",", "\"Helvetica Neue\",", "Helvetica,", "Arial,", "sans-serif", ";", "}", "div", "{", "width", ":", "600px", ";", "margin", ":", "5em", "auto", ";", "padding", ":", "2em", ";", "background-color", ":", "#fdfdff", ";", "border-radius", ":", "0.5em", ";", "box-shadow", ":", "2px", "3px", "7px", "2px", "rgba(0,0,0,0.02)", ";", "}", "a", ":", "link,", "a", ":", "visited", "{", "color", ":", "#38488f", ";", "text-decoration", ":", "none", ";", "}", "@media", "(max-width", ":", "700px)", "{", "div", "{", "margin", ":", "0", "auto", ";", "width", ":", "auto", ";", "}", "}"};
+
+            assertEquals(CssLexer.lex(idiomaticCss), Arrays.asList(expected));
+            for (String i : CssLexer.lex(idiomaticCss)) {
+                System.out.print("\"");
+                System.out.print(i);
+                System.out.print("\", ");
+            }
+        } catch (IOException e) {
+            System.out.printf("fuck %s\n", e.toString());
+            System.out.println(System.getProperty("user.dir"));
+        }
+    }
+/**
+    FoodServicesCard c1;
+    FoodServicesCard c2;
+    FoodServicesCard c3;
+
+    @BeforeEach
+    void runBefore() {
+        c1 = new FoodServicesCard(0);
+        c2 = new FoodServicesCard(100);
+        c3 = new FoodServicesCard(2000);
+    }
+
+    @Test
+    void testReloadingAndPurchasing() {
+        assertFalse(c1.makePurchase(100));
+        assertEquals(c1.getBalance(), 0);
+        c2.reload(10);
+        assertEquals(c2.getBalance(), 110);
+        assertTrue(c3.makePurchase(1400));
+        assertEquals(c3.getBalance(), 600);
+    }
+
+    @Test
+    void testRewardPoints() {
+        if (c1.makePurchase(c1.POINTS_NEEDED_FOR_CASH_BACK / 2)) {
+            assertEquals(c1.getRewardPoints(), (c1.POINTS_NEEDED_FOR_CASH_BACK / 2));
+        } else {
+            assertEquals(c1.getRewardPoints(), 0);
+        }
+        c2.makePurchase(c2.POINTS_NEEDED_FOR_CASH_BACK);
+        assertEquals(c2.getRewardPoints(), 0);
+        c3.makePurchase(1200);
+        assertEquals(c3.getRewardPoints(), 1200 % c3.POINTS_NEEDED_FOR_CASH_BACK);
+    }
+    */
+}
+\ No newline at end of file
diff --git a/src/test/model/HtmlLexerTest.java b/src/test/model/HtmlLexerTest.java
new file mode 100644
index 0000000..9dd5574
--- /dev/null
+++ b/src/test/model/HtmlLexerTest.java
@@ -0,0 +1,69 @@
+package model;
+
+import model.html.HtmlLexer;
+
+import org.junit.jupiter.api.*;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class HtmlLexerTest {
+    String idiomaticHtml = "<!DOCTYPE html><html><head></head><body><p>Hello,world!</p></body></html>";
+    String brokenHtml = "<html><foo><bar></bar><ba";
+    String trailingTextHtml = "<html><foo><bar></bar>ba";
+
+    @Test
+    void testIdiomaticHtml() {
+        String[] idiomaticHtmlArray = {"<!DOCTYPE html>","<html>","<head>","</head>","<body>","<p>","Hello,world!","</p>","</body>","</html>"};
+        assertEquals(HtmlLexer.lex(idiomaticHtml), Arrays.asList(idiomaticHtmlArray));
+    }
+
+    @Test
+    void testBrokenHtml() {
+        String[] brokenHtmlArray = {"<html>","<foo>","<bar>","</bar>","<ba>"};
+        assertEquals(HtmlLexer.lex(brokenHtml), Arrays.asList(brokenHtmlArray));
+    }
+
+    @Test
+    void testTrailingTextHtml() {
+        String[] trailingTextHtmlArray = {"<html>","<foo>","<bar>","</bar>","ba"};
+        assertEquals(HtmlLexer.lex(trailingTextHtml), Arrays.asList(trailingTextHtmlArray));
+    }
+
+/**
+    FoodServicesCard c1;
+    FoodServicesCard c2;
+    FoodServicesCard c3;
+
+    @BeforeEach
+    void runBefore() {
+        c1 = new FoodServicesCard(0);
+        c2 = new FoodServicesCard(100);
+        c3 = new FoodServicesCard(2000);
+    }
+
+    @Test
+    void testReloadingAndPurchasing() {
+        assertFalse(c1.makePurchase(100));
+        assertEquals(c1.getBalance(), 0);
+        c2.reload(10);
+        assertEquals(c2.getBalance(), 110);
+        assertTrue(c3.makePurchase(1400));
+        assertEquals(c3.getBalance(), 600);
+    }
+
+    @Test
+    void testRewardPoints() {
+        if (c1.makePurchase(c1.POINTS_NEEDED_FOR_CASH_BACK / 2)) {
+            assertEquals(c1.getRewardPoints(), (c1.POINTS_NEEDED_FOR_CASH_BACK / 2));
+        } else {
+            assertEquals(c1.getRewardPoints(), 0);
+        }
+        c2.makePurchase(c2.POINTS_NEEDED_FOR_CASH_BACK);
+        assertEquals(c2.getRewardPoints(), 0);
+        c3.makePurchase(1200);
+        assertEquals(c3.getRewardPoints(), 1200 % c3.POINTS_NEEDED_FOR_CASH_BACK);
+    }
+    */
+}
+\ No newline at end of file
diff --git a/src/test/model/MyModelTest.java b/src/test/model/MyModelTest.java
deleted file mode 100644
index c41f32e..0000000
--- a/src/test/model/MyModelTest.java
+++ /dev/null
@@ -1,7 +0,0 @@
-package model;
-
-import static org.junit.jupiter.api.Assertions.*;
-
-class MyModelTest {
-    // delete or rename this class!
-}
-\ No newline at end of file