Weeks 5 and 6.

6 files changed, 452 insertions, 78 deletions

diff --git a/src/CSVReader.java b/src/CSVReader.java
index fa588ef..3666531 100644
--- a/src/CSVReader.java
+++ b/src/CSVReader.java
@@ -17,14 +17,15 @@ import java.util.Arrays;
  */
 
 public class CSVReader extends Reader {
-	String[] header; // A CSV file has-a header. One line, multiple fields.
-	/* Array of Hash map from header to value for each
-	line past the header. */
-	ArrayList<HashMap<String,String>> body; // A CSV file has-a body. Multiple lines, multiple fields.
+	private String[] header; // A CSV file has-a header. One line, multiple fields.
+	// Array of HashMaps. Headers are keys, values are on each line of the CSV following the header.
+	private ArrayList<HashMap<String,String>> body; // A CSV file has-a body. Multiple lines, multiple fields.
 
 	public CSVReader(File file) {
 		super(file); // Call parent constructor
+		/* Construct the body to be filled. */
 		body = new ArrayList<HashMap<String,String>>();
+		/* Parse the contents of the file, store in body. */
 		parse();
 	}
 
@@ -32,26 +33,46 @@ public class CSVReader extends Reader {
 	 * Parse CSV file.
 	 */
 	public void parse() {
+		/* Split the input on newlines. */
 		String[] lines = this.getContents().split("\n");
+		/* Split the first line by commas, assign to header array. */
 		this.header = lines[0].split(",");
 
-		/* Iterate over all lines of the body. */
+		/* Iterate over all lines of the body.
+		First line is header, count from 1 instead of 0. */
 		for (int i = 1; i < lines.length; i++) {
+			/* Some lines have commas within parentheses.
+			Angkor,"/South East Asian (Thai, Khmer, Lao)/Looped",100
+			Remove everything within parentheses. We need to escape
+			not on a language level, but on a function call level.
+			Double-backslash for a literal backslash, which is then
+			used to escape the parentheses in the regex library. */
+			lines[i] = lines[i].replaceAll("\\(.*\\)", "");
+
+			/* CSV, Comma-Separated Values. */
 			String[] fields = lines[i].split(",");
+			/* Allocate a new HashMap for the given line of the CSV. */
 			HashMap<String,String> map = new HashMap<String,String>();
-			/* For each of the columns, add the associated
-			value in this row. */
+
+			/* Associate each of the line's fields with its header. */
 			for (int j = 0; j < header.length; j++) {
 				map.put(header[j], fields[j]);
 			}
+			/* Add the HashMap to the list. */
 			body.add(map);
 		}
 	}
 	
+	/**
+	 * @return the length of the body.
+	 */
 	public int getLength() {
 		return body.size();
 	}
 	
+	/**
+	 * @return the value associated with the given key on the given line.
+	 */
 	public String get(int i, String key) {
 		return body.get(i).get(key);
 	}
diff --git a/src/ComparisonView.java b/src/ComparisonView.java
index 8e20cf3..78897e9 100644
--- a/src/ComparisonView.java
+++ b/src/ComparisonView.java
@@ -10,6 +10,10 @@ import java.awt.*;
  * References:
  * https://zetcode.com/java/listdirectory/
  * https://stackoverflow.com/questions/4871051/how-to-get-the-current-working-directory-in-java
+ * https://stackoverflow.com/questions/2501861/how-can-i-remove-a-jpanel-from-a-jframe
+ * https://stackoverflow.com/questions/5652344/how-can-i-use-a-custom-font-in-java
+ * https://www.javaprogramto.com/2019/03/java-uimanager.html
+ * 
  * 
  * Date:
  * 2024-05-08
@@ -18,25 +22,29 @@ import java.awt.*;
  * Provide a view for comparing font families.
  */
 
+// ComparisonView is a JFrame
 public class ComparisonView extends JFrame {
-	private final int WINDOW_MIN_WIDTH = 960;
-	private final int WINDOW_MIN_HEIGHT = 540;
-	private ArrayList<FontFamily> fonts;
+	private final int WINDOW_MIN_WIDTH = 960; // A ComparisonView has a minimum height
+	private final int WINDOW_MIN_HEIGHT = 540; // A ComparisonView has a minimum width
+	private ArrayList<FontFamily> fonts; // A ComparisonView has a list of fonts
+	private Font textFont; // A ComparisonView has a preferred text font
+	private final int TEXT_SIZE = 20; // A ComparisonView has a constant text size.
 
 	/**
 	 * Walk the file tree.
 	 */
 	static void walk(File dir, ArrayList<File> list) {
-		File[] dirContents = dir.listFiles();
+		File[] dirContents = dir.listFiles(); // List the files in the directory.
+		// For each of the items in the directory:
 		for (int i = 0; i < dirContents.length; i++) {
-			if (dirContents[i].isFile()) {
-				if (dirContents[i] != null) {
-					list.add(dirContents[i]);
-				}
+			// If it's a file, and its name ends with '.pb', add it to the list.
+			if (dirContents[i].isFile() && dirContents[i].getName().endsWith(".pb")) {
+				list.add(dirContents[i]);
+			// If it's a directory, recurse through it.
 			} else if (dirContents[i].isDirectory()) {
 				walk(dirContents[i], list);
 			}
-			/* Otherwise, an irregular file. Ignore it. */
+			// Otherwise, it's an irregular file. Ignore it.
 		}
 	}
 
@@ -44,66 +52,89 @@ public class ComparisonView extends JFrame {
 	 * Initialize GUI and comparison.
 	 */
 	public ComparisonView() {
+		/* Set text font. Register the included ttf file as a font
+		in the current environment. This is akin to adding it to the map
+		of font family names and file names. */
+		try {
+			GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
+			environment.registerFont(Font.createFont(Font.TRUETYPE_FONT,
+				new File("./DejaVuSansCondensed.ttf")));
+		/* If either IOException or FontFormatException are thrown, error out. */
+		} catch (IOException|FontFormatException e) {
+			System.out.println(e.getMessage());
+			System.exit(-1);
+		}
+		
+		/* Set default text font to included DejaVu Sans Condensed. */
+		textFont = new Font("DejaVu Sans Condensed", Font.PLAIN, TEXT_SIZE);
+		getContentPane().setFont(textFont);
+		UIManager.put("Label.font", textFont);
+		UIManager.put("Panel.font", textFont);
+
+
 		setTitle("Google Fonts Style vs. Popularity"); // Window title
-		setMinimumSize(new Dimension(WINDOW_MIN_WIDTH,
-			WINDOW_MIN_HEIGHT)); // Minimum window size
+		setMinimumSize(new Dimension(WINDOW_MIN_WIDTH, WINDOW_MIN_HEIGHT)); // Minimum window size
 		/* On window close, kill the program. */
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
 		pack(); // Pack the GUI
 		setVisible(true); // Make the window visible
 
-		/* In $(find . | grep METADATA.pb), each
-		family is described in JSON. Human name is provided on first line.
-		For each METADATA.pb, instantiate a FontFamily object, keep
-		in an ArrayList. */	
-		//System.out.println(System.getProperty("user.dir"));
-		ArrayList<File> fileList = new ArrayList<File>();
+		/* In metadata/*.pb, each font is described.
+		Add each of the files in that directory to a list. */
+		ArrayList<File> metadataList = new ArrayList<File>();
 		try {
-			walk(new File("."), fileList);
+			walk(new File("."), metadataList);
 		} catch (Exception e) {
 			System.out.println(e.getMessage()); // Print error message
-			System.exit(1); // Exit with error
-		}
-		
-		ArrayList<File> metadataList = new ArrayList<File>();
-		/* Enhanced for loop. */
-		for (File file : fileList) {
-			if (file.getPath().endsWith(".pb")) {
-				metadataList.add(file);
-			}
+			System.exit(-1); // Exit with error
 		}
 		
+		/* Open families.csv and popularity.json. If either are missing,
+		the program cannot run. */
 		File styleFile = new File("families.csv");
 		if (!styleFile.exists()) {
+			System.out.println("families.csv doesn't exist.");
 			System.exit(-1);
 		}
-		
 		File popularityFile = new File("popularity.json");
 		if (!popularityFile.exists()) {
 			System.exit(-1);
 		}
 		
+		/* Panel to show while waiting for FontFamily data structures to populate. */
+		JPanel waiting = new JPanel();	
+		JLabel waitingLabel = new JLabel("Memory structures take 10-15 seconds to set up. My apologies.");
+		waiting.add(waitingLabel);
+		this.add(waiting, BorderLayout.CENTER);
+		setVisible(true);
 		
+		/* Construct Readers from each of the metadata files. */
 		CSVReader style = new CSVReader(styleFile);
 		JSONReader popularity = new JSONReader(popularityFile);
-		/* Create FontFamily objects from each METADATA.pb file. */
+		// Create FontFamily objects from each METADATA.pb file.
 		fonts = new ArrayList<FontFamily>();
+		/* For each metadata file, parse a FontFamily. */
 		for (File file : metadataList) {
 			JSONReader metadata = new JSONReader(file);
-			metadata.setPb();
+			metadata.setMetadata();
 			fonts.add(new FontFamily(metadata, popularity, style));
 		}
-		
-		for (FontFamily font : fonts) {
-			System.out.println(font.getFamilyName());
-			for (String subset : font.getSubsets()) {
-				System.out.println(subset);
-			}
-		}
+
+		waiting.remove(waitingLabel); // Remove waiting message.
+		JPanel author = new JPanel();
+		JLabel authorLabel = new JLabel("Written by Kian Agheli");
+		author.add(authorLabel);
+		add(author, BorderLayout.SOUTH); // Add author panel.
+
+		LineGraph graph = new LineGraph(fonts); // Draw a line graph of the font views metadata.
+		add(graph, BorderLayout.NORTH); // Add the line graph.
+
+		pack(); // Pack the window.
+		setVisible(true); // Re-draw the window.
 	}
 
 	public static void main(String[] argv) {
-		new ComparisonView();
+		new ComparisonView(); // Call the constructor.
 	}
 }
diff --git a/src/FontFamily.java b/src/FontFamily.java
index cff4f87..59a458d 100644
--- a/src/FontFamily.java
+++ b/src/FontFamily.java
@@ -28,9 +28,10 @@ public class FontFamily {
 	private String designer;
 	/* total views, 7day views, 30day views, 90day views, year views.
 	Taken from popularity.json. */
+	final String[] popularityMetrics = {"7day", "30day", "90day", "year"};
 	private HashMap<String,Long> views;
-	private String license;
-	private String category;
+	private String license; // Distribution license.
+	private String category; // Vague category.
 	/* popularity.json and families.csv are shared among all families.
 	Have their associated objects passed from outside. */
 
@@ -38,16 +39,21 @@ public class FontFamily {
 	 * Constructor.
 	 */
 	public FontFamily(JSONReader metadata, JSONReader popularity, CSVReader styles) {
-		this.metadata = metadata;
-		parseMetadata(metadata);
-		parsePopularity(popularity);
-		parseStyles(styles);
+		this.metadata = metadata; // Set the instance's metadata to passed value. */
+		parseMetadata(metadata); // Parse the metadata.
+
+		views = new HashMap<String,Long>(); // Instantiate views hash map.
+		parsePopularity(popularity); // Parse the popularity data
+
+		this.styles = new HashMap<String,Integer>(); // Instantiate styles hash map
+		parseStyles(styles); // Parse the styles data
 	}
 
 	/**
 	 * Parse metadata.
 	 */
 	private void parseMetadata(JSONReader metadata) {
+		/* Parse the given fields. See their values described near the top of the class definition. */
 		familyName = metadata.get("name");
 		dateAdded = metadata.get("date_added");
 		subsets = metadata.getAll("subsets");
@@ -60,18 +66,91 @@ public class FontFamily {
 	 * Parse popularity.
 	 */
 	private void parsePopularity(JSONReader popularity) {
+		String popularityJson = popularity.getFamily(familyName); // Block of JSON for this family
+		if (popularityJson == null) {
+			/* Not all families have popularity metadata, just most. */
+			return;
+		}
+
+		/* For each timeframe provided in popularity.json, parse as long and add to hash map. */
+		for (String timeframe : popularityMetrics) {
+			String timeframeKey = "\"" + timeframe + "\":"; // JSON key
+			int timeframeIndex = popularityJson.indexOf(timeframeKey); // Index of JSON key
+
+			String viewsKey = "\"views\": "; // JSON key for views following timeframe key
+			int viewsIndex = popularityJson.indexOf(viewsKey, timeframeIndex);
+
+			int start = viewsIndex + viewsKey.length(); // Start of data after key
+			int end = popularityJson.indexOf(",", start); // End of data before next comma
+
+			long value = 0;
+			/* Parse views as long. */
+			try {
+				value = Long.parseLong(popularityJson.substring(start, end));
+			/* If fail to parse as long, something is wrong with popularity.json.
+			2^63 is a big number to overflow. */
+			} catch (NumberFormatException e) {
+				System.out.println("Failed to parse " + e.getMessage());
+				System.exit(-1);
+			}
+
+			views.put(timeframe, value); // Add the parsed long to the hash map
+		}
+
+		/* Parse total views for given family. */
+		try {
+			views.put("total", Long.parseLong(JSONReader.get(popularityJson, "totalViews")));
+		/* If fail to parse as long, something is wrong with popularity.json.
+		2^63 is a big number to overflow. */
+		} catch (NumberFormatException e) {
+				System.out.println("Failed to parse " + e.getMessage());
+				System.exit(-1);
+		}
+
 	}
 
 	/**
 	 * Parse styles.
 	 */
-	private void parseStyles(CSVReader styles) {
+	private void parseStyles(CSVReader styleCsv) {
+		int len = styleCsv.getLength(); // Lines of body in CSV
+
+		/* Styles CSV has three header fields: Family, Group/Tag, and Weight. */
+		for (int i = 0; i < len; i++) {
+			/* If the current row contains data for the given family, add that data. */
+			if (familyName.equals(styleCsv.get(i, "Family"))) {
+				try {
+					/* Add the Group/Tag and the associated weight. */
+					styles.put(styleCsv.get(i, "Group/Tag"),
+						Integer.parseInt(styleCsv.get(i, "Weight")));
+				/* If unable to parse as integer, something is wrong with families.csv. */
+				} catch (NumberFormatException e) {
+					System.out.println("Unable to parse " + e.getMessage());
+					System.exit(-1);
+				}
+			}
+
+		}
 	}
 	
+	/**
+	 * @return family name
+	 */
 	public String getFamilyName() {
 		return familyName;
 	}
+
+	/**
+	 * @return unicode subsets.
+	 */
 	public String[] getSubsets() {
 		return subsets;
 	}
+
+	/**
+	 * @return views hash map
+	 */
+	public HashMap<String,Long> getViews() {
+		return views;
+	}
 }
diff --git a/src/JSONReader.java b/src/JSONReader.java
index 45f6bd5..44831c9 100644
--- a/src/JSONReader.java
+++ b/src/JSONReader.java
@@ -1,5 +1,6 @@
 import java.util.HashMap;
 import java.util.ArrayList;
+
 import java.io.*;
 
 /*
@@ -9,6 +10,8 @@ import java.io.*;
  * References:
  * https://googlefonts.github.io/gf-guide/metadata.html
  * https://stackoverflow.com/questions/3880274/how-to-convert-the-object-to-string-in-java
+ * https://stackoverflow.com/questions/8938498/get-the-index-of-a-pattern-in-a-string-using-regex
+ * https://howtodoinjava.com/java/regex/start-end-of-string/
  * 
  * Date:
  * 2024-05-08
@@ -21,15 +24,23 @@ public class JSONReader extends Reader {
 	/* metadata.pb is not exactly JSON, but so close to it
 	that it's practically a subset of JSON with fewer quotation
 	marks. If set, this is a pb file. */
-	private boolean pb;
+	private boolean isMetadata;
 
 	public JSONReader(File file) {
-		super(file);
-		pb = false;
+		super(file); // Call constructor.
+		isMetadata = false; // By default, not metadata.
 	}
 	
 	private String composeKey(String key) {
-		if (!pb) {
+		/* Call static version. This has the benefit of reducing code size.
+		Rather than write two separate static and instantiated versions, the
+		instantiated version may call the static version. */
+		return composeKey(key, this.isMetadata);
+	}
+
+	private static String composeKey(String key, boolean isMetadata) {
+		/* JSON usually has quotes surrounding keys. Google's metadata doesn't. */
+		if (!isMetadata) {
 			key = "\"" + key + "\"";
 		}
 		key += ": ";
@@ -42,20 +53,32 @@ public class JSONReader extends Reader {
 	 * match.
 	 */
 	public String get(String key) {
-		key = composeKey(key);
-		
-		int start = this.getContents().indexOf(key);
+		/* Call static version. */
+		return JSONReader.get(this.getContents(), key, isMetadata);
+	}
+
+	public static String get(String json, String key) {
+		/* No isMetadata boolean passed, presumably irrelevant. */
+		return JSONReader.get(json, key, false);
+	}
+
+	/**
+	 * Get a value given a key and a block of JSON to search.
+	 */
+	public static String get(String json, String key, boolean isMetadata) {
+		key = composeKey(key, isMetadata); // Compose a key
+		int start = json.indexOf(key); // Index of key
 		if (start == -1) {
 			/* No match. */
 			return null;
 		}
 		
-		start += key.length();
+		start += key.length(); // Start of data past key
 		/* This JSON is pretty-printed. */
-		int nl = this.getContents().indexOf("\n", start);
+		int nl = json.indexOf("\n", start);
 		
 		/* Extract substring. Remove any quotation marks and commas. */
-		String substring = this.getContents().substring(start, nl);
+		String substring = json.substring(start, nl);
 		return substring.replaceAll("[\",]", "");
 	}
 
@@ -63,12 +86,13 @@ public class JSONReader extends Reader {
 	 * Search for and return all matches.
 	 */
 	public String[] getAll(String key) {
-		key = composeKey(key);
+		key = composeKey(key); // Compose key
 		
-		ArrayList<String> list = new ArrayList<String>();
-		int lastMatch = 0;
+		ArrayList<String> list = new ArrayList<String>(); // ArrayList to compose output array
+		int lastMatch = 0; // Previous match's index. Necessary for iteration through file contents.
+		/* While matches exist, continue. */
 		while ((lastMatch = this.getContents().indexOf(key, lastMatch)) != -1) {
-			lastMatch += key.length();
+			lastMatch += key.length(); // Data starts after key.
 			int start = lastMatch;
 			/* This JSON is pretty-printed. */
 			int nl = this.getContents().indexOf("\n", start);
@@ -90,16 +114,48 @@ public class JSONReader extends Reader {
 	}
 	
 	/**
-	 * Search for and return a table of fields.
+	 * @return a block of JSON associated with a font family.
+	 * Heavily reliant on the format of popularity.json. Not
+	 * suitable for generic JSON parsing.
 	 */
-	public String getTable(HashMap<String,String> name) {
-		return null;
+	public String getFamily(String family) {
+		/* Taking advantage of the specific structure 
+		of popularity.json. Find the index of the family
+		name declaration. Then, all items until the next line
+		starting with '  }' are included. */
+		String contents = this.getContents();
+		int start = contents.indexOf("   \"family\": \"" + family + "\",");
+		if (start == -1) {
+			/* No match. */
+			return null;
+		}
+
+		/* Restring input starting from family name declaration. */
+		contents = contents.substring(start);
+
+		String[] lines = contents.split("\n");
+		int i = 0;
+		/* In this format, an end block is guaranteed.
+		Iterate through lines until the desired level of end
+		block is found. */
+		while (!lines[i].startsWith("  }")) {
+			i++;
+		}
+
+		/* For each of the lines in the block preceding the end block,
+		add to output. */
+		String result = "";
+		for (int j = 0; j < i; j++) {
+			result += lines[j] + "\n";
+		}
+
+		return result;
 	}
 	
 	/**
-	 * Specify that this is the special PB format.
+	 * Specify that this is the special pb metadata format. Almost JSON.
 	 * See https://googlefonts.github.io/gf-guide/metadata.html. */
-	public void setPb() {
-		this.pb = true;
+	public void setMetadata() {
+		this.isMetadata = true;
 	}
 }
diff --git a/src/LineGraph.java b/src/LineGraph.java
index 129bb1c..3097be4 100644
--- a/src/LineGraph.java
+++ b/src/LineGraph.java
@@ -1,10 +1,24 @@
 import javax.swing.*;
+import java.awt.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Calendar;
+import java.util.Date;
 
 /*
  * @author
  * Kian Agheli
  *
  * References:
+ * https://stackoverflow.com/questions/8693342/drawing-a-simple-line-graph-in-java
+ * https://www.geeksforgeeks.org/sorting-a-hashmap-according-to-values/
+ * https://stackoverflow.com/questions/16252269/how-to-sort-a-list-arraylist
+ * https://stackoverflow.com/questions/2839508/java2d-increase-the-line-width
+ * https://stackoverflow.com/questions/4285464/java2d-graphics-anti-aliased
+ * https://stackoverflow.com/questions/7182996/java-get-month-integer-from-date
+ * https://stackoverflow.com/questions/5799140/java-get-month-string-from-integer
  *
  * Date:
  * 2024-05-08
@@ -13,20 +27,193 @@ import javax.swing.*;
  * Draw a line graph.
  */
 
-public class LineGraph {
-	private int[][] coordinates; // A line graph has-a set of coordinates
+// A LineGraph is-a JPanel
+public class LineGraph extends JPanel {
+	private ArrayList<FontFamily> fonts; // A line graph has-a set of fonts
+	private final int WIDTH = 640; // A line graph has a preferred width
+	private final int HEIGHT = 480; // A line graph has a preferred height
+	private final int LINES = 0x10; // A line graph has a maximum lines graphed at a time
+	private final int LINE_WIDTH = 3; // A line graph has lines with a given pixel width
+	private final int TICK_HEIGHT = 10; // A line graph has ticks with a given pixel height
+	/* A line graph has an array of abbreviated month names. */
+	private final String[] ABBREVIATED_MONTH = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
+		"Aug", "Sep", "Oct", "Nov", "Dec"};
+	/* A line graph has an array of unique color values to use for each of the lines. */
+	private final int[] COLORS = {0xff0000, 0x00ff00, 0x0000ff, 0xffff00, 0xff00ff, 0x00ffff,
+		0xff8040, 0xff4080, 0x80ff40, 0x40ff80, 0x4080ff, 0x8040ff, 0xff8080, 0x80ff80, 0x8080ff,
+		0xff4040, 0x40ff40, 0x4040ff};
 
 	/**
 	 * Constructor.
 	 */
-	public LineGraph() {
-		coordinates = null;
+	public LineGraph(ArrayList<FontFamily> fonts) {
+		this.fonts = fonts; // Set instance's list of fonts to the list passed.
+		this.setPreferredSize(new Dimension(WIDTH, HEIGHT)); // Set the preferred size of the panel.
 	}
-	
 
 	/**
 	 * Set a point at a pair of coordinates.
 	 */
 	void setCoordinates(int y, int x) {
 	}
+
+	/* Automatically called at construction time. */
+	@Override
+	public void paintComponent(Graphics g) {
+		/* Cast to Graphics2D. Permits use of Graphics2D methods. */
+		Graphics2D graphics = (Graphics2D) g;
+		/* White background. */
+		graphics.setBackground(Color.WHITE);
+		/* Fill entire space allocated. No margins or padding. */
+		graphics.clearRect(0, 0, getWidth(), getHeight());
+		/* Enable anti-aliasing. */
+		graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
+
+		/* Set line width. */
+		graphics.setStroke(new BasicStroke(LINE_WIDTH));
+		/* Draw in black. */
+		graphics.setColor(Color.BLACK);
+		/* Store font metrics so as to calculate width and height of each tick's text. */
+		FontMetrics metrics = graphics.getFontMetrics();
+		/* Store enough space on the left for 12 digits. Assuming tabular figures. */
+		int xOffset = metrics.stringWidth("012345678901");
+		/* Keep enough space at bottom for text with descenders and ticks. */
+		int yMax = getHeight() - (metrics.getHeight() << 1) - TICK_HEIGHT;
+		/* Keep enough space at right for the right half of the text "MMM". */
+		int xMax = getWidth() - (metrics.stringWidth("MMM") >> 1) - TICK_HEIGHT - xOffset;
+		/* Draw x axis. */
+		graphics.drawLine(TICK_HEIGHT + xOffset, yMax,
+			getWidth(), yMax);
+
+		/* Store calendar, so as to get month. */
+		Date date = new Date();
+		Calendar calendar = Calendar.getInstance();
+		calendar.setTime(date); // Set calendar to current date
+
+		/* For each month in the year, draw a tick on the x axis. */
+		int x = xMax;
+		int xTicks = 12;
+		double xSpace = (float) x / xTicks;
+
+		for (int i = 0; i <= xTicks; i++) {
+			graphics.drawLine(x + TICK_HEIGHT + xOffset, yMax,
+				x + TICK_HEIGHT + xOffset, getHeight() - metrics.getHeight());
+			String month = ABBREVIATED_MONTH[calendar.get(Calendar.MONTH)];
+			/* Half the width for centering offset. */
+			int textOffset = metrics.stringWidth(month) >> 1;
+			graphics.drawString(month, x + TICK_HEIGHT + xOffset - textOffset,
+				getHeight() - metrics.getHeight() / 5 * 2);
+			x = (int) (x - xSpace); // Decrement x offset.
+			calendar.roll(Calendar.MONTH, false); // Roll back by one month
+		}
+
+		/* Draw y axis. Subtract one third of stroke width to account for width of first tick. */
+		graphics.drawLine(TICK_HEIGHT + xOffset - LINE_WIDTH / 3, 0, TICK_HEIGHT + xOffset -
+			LINE_WIDTH / 3, yMax);
+
+		sortFonts("30day"); // Sort the list of fonts by their 30day metrics.
+
+		int y = 0 + metrics.getHeight();
+		/* Cast to double within parentheses for floating-point
+		division, cast back to int to remove fractional part.
+		5/4 spacing for legibility. */
+		int yTicks = (int) (yMax / ((double) metrics.getHeight() * 5 / 4));
+		/* Sorted values by monthly views in descending order. The greatest value is at the top. */
+		long maxViews = fonts.get(0).getViews().get("30day");
+		float ySpace = (float) yMax / yTicks;
+		for (int i = yTicks; i >= 0; i--) {
+			String text = String.format("%d", maxViews * i / yTicks);
+			/* Difference between maximum string width and actual string width is offset. */
+			int textOff = xOffset - metrics.stringWidth(text);
+			graphics.drawString(text, textOff, y);
+			y += ySpace;
+		}
+
+		/* Draw lines. */
+		for (int i = 0; i < LINES; i++) {
+			FontFamily font = fonts.get(i); // Keep the current font handy.
+			HashMap<String,Long> views = font.getViews(); // Keep the views hashmap handy.
+
+			/* Map of coordinates to draw. */
+			HashMap<Integer,Long> coordinates = new HashMap<Integer,Long>();
+
+			/* Use the given metrics to guesstimate the values of each month.
+			The last month's views are known. */
+			coordinates.put(12, views.get("30day"));
+
+			/* Using 90day views, we may subtract 30day to get a closer approximation
+			of 60day views. */
+			coordinates.put(11, (views.get("90day") - views.get("30day")) / 2);
+
+			/* Account for changes in views by deriving views 3 months ago from 90day
+			views / 3. */
+			coordinates.put(10, (views.get("90day") / 3));
+
+			
+			/* Guesstimate the rest of the months by yearly views / 12. */
+			for (int j = 1; j <= 9; j++) {
+				coordinates.put(j, (views.get("year") / 12));
+			}
+
+			graphics.setColor(new Color(COLORS[i])); // Set the drawing color.
+
+			/* Previous x and y values. Necessary for drawing lines between points. */
+			int xPrevious = 0;
+			int yPrevious = 0;
+			for (int xCoordinate = 1; xCoordinate <= 12; xCoordinate++) {
+				/* x is ratio of month value / 12.
+				Because y starts at the top, invert with subtraction from maximum pixel value.
+				Ratio of given views over maximum views, multiplied by maximum pixel value.
+				Circle with radius of LINE_WIDTH * 2. */
+				int xCurrent = xOffset + TICK_HEIGHT + xMax * xCoordinate / 12;
+				int yCurrent = yMax - (int) ((float) coordinates.get(xCoordinate) /
+					maxViews * yMax);
+				graphics.fillOval(xCurrent, yCurrent, LINE_WIDTH << 1, LINE_WIDTH << 1);
+				
+				/* Line to previous point, if set. */
+				if (xPrevious == 0) {
+					/* If no previous point, use current y value. */
+					graphics.drawLine(xOffset + TICK_HEIGHT + xMax * (xCoordinate - 1) / 12,
+						yCurrent, xCurrent, yCurrent);
+				} else {
+					/* Line from previous x and y to current x and y. */
+					graphics.drawLine(xPrevious, yPrevious, xCurrent, yCurrent);
+				}
+
+				/* Set previous values for next iteration. */
+				yPrevious = yCurrent;
+				xPrevious = xCurrent;
+			}
+		}
+	}
+
+	/* Sort by views, in descending order. */
+	private void sortFonts(String metric) {
+		Collections.sort(fonts, new Comparator<FontFamily>() {
+			/* If a is lesser, return 1. If b is lesser, return -1.
+			Otherwise, they are equal, return 0. */
+			public int compare (FontFamily a, FontFamily b) {
+				/* If equal, return 0. */
+				if (a.getViews().get(metric) == b.getViews().get(metric)) {
+					return 0;
+				}
+
+				/* If either is null, it is lesser. */
+				if (a.getViews().get(metric) == null) {
+					return 1;
+				}
+				if (b.getViews().get(metric) == null) {
+					return -1;
+				}
+
+				/* Neither are null, compare. */
+				if (a.getViews().get(metric) > b.getViews().get(metric)) {
+					return -1;
+				}
+
+				/* aViews must be lesser. */
+				return 1;
+			}
+		});
+	}
 }
diff --git a/src/Reader.java b/src/Reader.java
index cdad0cc..05dd03e 100644
--- a/src/Reader.java
+++ b/src/Reader.java
@@ -33,7 +33,7 @@ class Reader {
 		/* On exception, exit. */
 		} catch (Exception e) {
 			System.out.println(e.getMessage());
-			System.exit(1);
+			System.exit(-1);
 		}
 	}