Added script for prepending dates to the timestamp files

diff --git a/Code/Projects/DateWriter/DateWriter.java b/Code/Projects/DateWriter/DateWriter.java
new file mode 100644 (file)
index 0000000..adde143
--- /dev/null
+++ b/Code/Projects/DateWriter/DateWriter.java
@@ -0,0 +1,54 @@
+import java.io.File;
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.PrintWriter;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
+import java.io.IOException;
+
+public class DateWriter {
+
+       public static void main(String[] args) throws IOException {
+               if (args.length < 3) {
+                       System.out.println("Usage: java /path/to/file/with/timestamps /path/to/new/timestamp/file/with/dates initial_date_in_uuuu-MM-dd_format");
+                       System.exit(1);
+               }
+               String pathOriginal = args[0];
+               String pathModified = args[1];
+               String initialDateStr = args[2];
+               LocalDate date = LocalDate.parse(initialDateStr, DateTimeFormatter.ofPattern("uuuu-MM-dd"));
+               File originalFile = new File(pathOriginal);
+               // Create output file
+               File modifiedFile = new File(pathModified);
+               modifiedFile.createNewFile();
+               BufferedReader reader = new BufferedReader(new FileReader(originalFile));
+               PrintWriter writer = new PrintWriter(modifiedFile);
+               String line = null;
+               String prevLine = null;
+               while ((line = reader.readLine()) != null) {
+                       if (isNewDay(line, prevLine)) {
+                               // Advance date
+                               date = date.plusDays(1);
+                       }
+                       writer.println(String.format("%s %s", date.toString(), line));
+                       prevLine = line;
+               }
+               writer.flush();
+               writer.close();
+               reader.close();
+       }
+
+       private static boolean isNewDay(String line, String prevLine) {
+               if (prevLine == null) {
+                       return false;
+               }
+               // First part handles case where we pass midnight and the following timestamp is an AM timestamp
+               // Second case handles case where we pass midnight, but the following timestamp is a PM timestamp
+               return line.endsWith("AM") && prevLine.endsWith("PM") || toLocalTime(line).isBefore(toLocalTime(prevLine));
+       }
+
+       private static LocalTime toLocalTime(String timeString) {
+               return LocalTime.parse(timeString, DateTimeFormatter.ofPattern("h:mm:ss a"));
+       }
+}
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