Create TimeAPI.java

src/main/java/dan200.computercraft/core/apis/TimeAPI.java

@@ -0,0 +1,136 @@
+package dan200.computercraft.core.apis;
+
+import dan200.computercraft.api.lua.ILuaContext;
+import dan200.computercraft.api.lua.LuaException;
+
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+
+
+public class TimeAPI implements ILuaAPI{
+
+    private static final String DEFAULT_TIME_FORMAT = "yyyy-MM-dd'T'HH:mm:ss";
+
+    private String formatDate(String pattern, Date date) {
+        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
+        return sdf.format(date);
+    }
+
+    private long parseDate(String pattern, String value) throws LuaException {
+        SimpleDateFormat sdf = new SimpleDateFormat(pattern);
+        long timestamp;
+        try {
+            timestamp = sdf.parse(value).getTime();
+        } catch (ParseException parseException) {
+            throw new LuaException("Date can't parsed");
+        }
+        return timestamp;
+    }
+
+    @Override
+    public String[] getNames() {
+        return new String[]{
+                "time",
+        };
+    }
+
+    @Override
+    public void startup() {}
+
+    @Override
+    public void advance(double _dt) {}
+
+    @Override
+    public void shutdown() {}
+
+    @Override
+    public String[] getMethodNames() {
+        return new String[] {
+                "format",
+                "getDay",
+                "getMonth",
+                "getYear",
+                "getHour",
+                "getMinute",
+                "getSecound",
+                "getTime",
+                "parse"
+        };
+    }
+
+    @Override
+    public Object[] callMethod(ILuaContext context, int method, Object[] args) throws LuaException, InterruptedException {
+
+        //timestamp like PHP without mills!
+
+        Calendar cal = Calendar.getInstance();
+
+        //If timestamp is given
+        if (args.length > 0 && args[0] != null && args[0] instanceof Double) {
+            long argTime = ((Double)args[0]).longValue()*1000;
+            cal.setTimeInMillis(argTime);
+        }
+
+        Object[] returnArray = new Object[1];
+        int calendarValue = -1;
+        int addValue = 0;
+
+        switch (method) {
+            case 0:
+                //format()
+                String format = DEFAULT_TIME_FORMAT;
+                if (args.length == 1 && args[0] instanceof String) {
+                    format = (String) args[0];
+                }
+                else if (args.length == 2 && args[1] instanceof String) {
+                    format = (String) args[1];
+                }
+                returnArray[0] = formatDate(format, cal.getTime());
+                break;
+            case 1:
+                //getDay()
+                calendarValue = Calendar.DAY_OF_MONTH;
+                break;
+            case 2:
+                //getMonth()
+                calendarValue = Calendar.MONTH;
+                addValue = 1;
+                break;
+            case 3:
+                //getYear()
+                calendarValue = Calendar.YEAR;
+                break;
+            case 4:
+                //getHour()
+                calendarValue = Calendar.HOUR_OF_DAY;
+                break;
+            case 5:
+                //getMinute()
+                calendarValue = Calendar.MINUTE;
+                break;
+            case 6:
+                //getSecound()
+                calendarValue = Calendar.SECOND;
+                break;
+            case 7:
+                //getTime()
+                returnArray[0] = cal.getTimeInMillis() / 1000;
+                break;
+            case 8:
+                //parse(String pattern, String input)
+                if (args.length < 2 || args[0] == null || args[1] == null || !(args[0] instanceof String) || !(args[1] instanceof String)) {
+                    throw new LuaException("String expected!");
+                }
+                String  pattern = (String) args[0],
+                        input   = (String) args[1];
+                returnArray[0] = parseDate(pattern, input) / 1000;
+        }
+
+        if (calendarValue != -1 && returnArray[0] == null) {
+            returnArray[0] = cal.get(calendarValue)+addValue;
+        }
+        return returnArray;
+    }
+}