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-;;; my-uptime.el --- calculates uptime for SLOs
-
-;;; Commentary:
-
-;; Calculate how much downtime is allowed for different period of time
-;; based on a given SLO.
-
-;;; Code:
-
-(defconst my-uptime/buffer-name "*slo-calculator*")
-
-(defconst my-uptime/seconds-per-hour 3600
- "Number of seconds in an hour.")
-(defconst my-uptime/seconds-per-day (* my-uptime/seconds-per-hour 24)
- "Number of seconds in a day.")
-(defconst my-uptime/seconds-per-week (* my-uptime/seconds-per-day 7)
- "Number of seconds in a week.")
-(defconst my-uptime/seconds-per-month (* my-uptime/seconds-per-day 30)
- "Number of seconds in a month.")
-(defconst my-uptime/seconds-per-quarter (* my-uptime/seconds-per-month 3)
- "Number of seconds in a quarter.")
-(defconst my-uptime/seconds-per-year (* my-uptime/seconds-per-month 12)
- "Number of seconds in a year.")
-
-(defun my/uptime-is (slo)
- "Return the amount of allowed downtime for a given SLO."
- (interactive "nSLO:")
- (let* ((slo (cond ((< slo 0) 0)
- ((> slo 100) 100)
- (t slo)))
- (allowed (/ (- (* 100 100) (* slo 100.0)) (* 100 100))))
- (my/uptime--message allowed slo)))
-
-(defun my/uptime--message (seconds slo)
- "Insert buffer text with allowed downtime based on SECONDS (derived from SLO)."
- (let ((inhibit-read-only t)
- (buffer-undo-list t))
- (pop-to-buffer my-uptime/buffer-name)
- (erase-buffer)
- (insert (format "calculated allowed downtime for %s%% availability.\n" slo))
- (insert
- (format "daily: %s\n" (format-seconds "%H %M %S" (seconds-to-time (* my-uptime/seconds-per-day seconds)))))
- (insert
- (format "weekly: %s\n" (format-seconds "%H %M %S" (seconds-to-time (* my-uptime/seconds-per-week seconds)))))
- (insert
- (format "monthly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-month seconds)))))
- (insert
- (format "quarterly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-quarter seconds)))))
- (insert
- (format "yearly: %s\n" (format-seconds "%D %H %M %S" (seconds-to-time (* my-uptime/seconds-per-year seconds))))))
- (special-mode))
-
-(provide 'my-uptime)
-
-;;; my-uptime.el ends here