build: Flatten project structure

This change updates the project structure to become flattened. 
Previously, the simulator, frontend and API each lived into their own directory. 

With this change, all modules of the project live in the top-level directory of 
the repository.

1 files changed, 93 insertions, 0 deletions

diff --git a/opendc-web/opendc-web-ui/src/util/date-time.js b/opendc-web/opendc-web-ui/src/util/date-time.js
new file mode 100644
index 00000000..66efdf5b
--- /dev/null
+++ b/opendc-web/opendc-web-ui/src/util/date-time.js
@@ -0,0 +1,93 @@
+/**
+ * Parses and formats the given date-time string representation.
+ *
+ * The format assumed is "YYYY-MM-DDTHH:MM:SS".
+ *
+ * @param dateTimeString A string expressing a date and a time, in the above mentioned format.
+ * @returns {string} A human-friendly string version of that date and time.
+ */
+export function parseAndFormatDateTime(dateTimeString) {
+    return formatDateTime(parseDateTime(dateTimeString))
+}
+
+/**
+ * Parses date-time string representations and returns a parsed object.
+ *
+ * The format assumed is "YYYY-MM-DDTHH:MM:SS".
+ *
+ * @param dateTimeString A string expressing a date and a time, in the above mentioned format.
+ * @returns {object} A Date object with the parsed date and time information as content.
+ */
+export function parseDateTime(dateTimeString) {
+    return new Date(dateTimeString + '.000Z')
+}
+
+/**
+ * Serializes the given date and time value to a human-friendly string.
+ *
+ * @param dateTime An object representation of a date and time.
+ * @returns {string} A human-friendly string version of that date and time.
+ */
+export function formatDateTime(dateTime) {
+    let date
+    const currentDate = new Date()
+
+    date =
+        addPaddingToTwo(dateTime.getDay()) +
+        '/' +
+        addPaddingToTwo(dateTime.getMonth()) +
+        '/' +
+        addPaddingToTwo(dateTime.getFullYear())
+
+    if (dateTime.getFullYear() === currentDate.getFullYear() && dateTime.getMonth() === currentDate.getMonth()) {
+        if (dateTime.getDate() === currentDate.getDate()) {
+            date = 'Today'
+        } else if (dateTime.getDate() === currentDate.getDate() - 1) {
+            date = 'Yesterday'
+        }
+    }
+
+    return date + ', ' + addPaddingToTwo(dateTime.getHours()) + ':' + addPaddingToTwo(dateTime.getMinutes())
+}
+
+/**
+ * Formats the given number of seconds/ticks to a formatted time representation.
+ *
+ * @param seconds The number of seconds.
+ * @returns {string} A string representation of that amount of second, in the from of HH:MM:SS.
+ */
+export function convertSecondsToFormattedTime(seconds) {
+    if (seconds <= 0) {
+        return '0s'
+    }
+
+    let hour = Math.floor(seconds / 3600)
+    let minute = Math.floor(seconds / 60) % 60
+    let second = seconds % 60
+
+    hour = isNaN(hour) ? 0 : hour
+    minute = isNaN(minute) ? 0 : minute
+    second = isNaN(second) ? 0 : second
+
+    if (hour === 0 && minute === 0) {
+        return second + 's'
+    } else if (hour === 0) {
+        return minute + 'm' + addPaddingToTwo(second) + 's'
+    } else {
+        return hour + 'h' + addPaddingToTwo(minute) + 'm' + addPaddingToTwo(second) + 's'
+    }
+}
+
+/**
+ * Pads the given integer to have at least two digits.
+ *
+ * @param integer An integer to be padded.
+ * @returns {string} A string containing the padded integer.
+ */
+function addPaddingToTwo(integer) {
+    if (integer < 10) {
+        return '0' + integer.toString()
+    } else {
+        return integer.toString()
+    }
+}