54 lines
1.5 KiB
D
54 lines
1.5 KiB
D
module analytics.util;
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import std.datetime;
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import std.array;
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import util.data;
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SysTime[] generateTimeSeriesTimestamps(Duration intervalSize, int intervalCount) {
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const SysTime now = Clock.currTime(UTC());
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const SysTime endOfToday = SysTime(
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DateTime(now.year, now.month, now.day, 23, 59, 59),
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now.timezone
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);
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SysTime timestamp = endOfToday;
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SysTime[] timestamps = new SysTime[intervalCount + 1];
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timestamps[0] = timestamp;
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for (int i = 0; i < intervalCount; i++) {
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timestamp = timestamp - intervalSize;
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timestamps[i + 1] = timestamp;
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}
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return timestamps;
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}
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SysTime[] generateTimeSeriesTimestamps(Duration intervalSize, in TimeRange timeRange) {
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SysTime endOfRange;
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SysTime startOfRange;
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if (timeRange.toTime.isNull) {
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endOfRange = Clock.currTime(UTC());
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} else {
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endOfRange = timeRange.toTime.value;
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}
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if (timeRange.fromTime.isNull) {
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startOfRange = endOfRange;
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startOfRange.add!"years"(-5);
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} else {
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startOfRange = timeRange.fromTime.value;
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}
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import std.stdio;
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writefln!"start = %s, end = %s"(startOfRange, endOfRange);
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Appender!(SysTime[]) app;
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app ~= startOfRange;
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SysTime timestamp = startOfRange;
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while (timestamp + intervalSize <= endOfRange) {
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timestamp += intervalSize;
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app ~= timestamp;
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}
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return app[];
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}
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ulong toUnixMillis(in SysTime ts) {
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return (ts - SysTime(unixTimeToStdTime(0))).total!"msecs";
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}
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