1
0
mirror of https://github.com/kremalicious/blog.git synced 2024-11-11 23:55:16 +01:00
blog/_src/_plugins/timeago.rb

109 lines
2.7 KiB
Ruby

#
# jekyll-timeago
#
# https://github.com/markets/jekyll-timeago
#
module Jekyll
module Timeago
DAYS_PER = {
:days => 1,
:weeks => 7,
:months => 31,
:years => 365,
}
# Max level of detail
# years > months > weeks > days
# 1 year and 7 months and 2 weeks and 6 days
MAX_DEPTH_LEVEL = 4
# Default level of detail
# 1 month and 5 days, 3 weeks and 2 days, 2 years and 6 months
DEFAULT_DEPTH_LEVEL = 2
def timeago(input, depth = DEFAULT_DEPTH_LEVEL)
unless depth_allowed?(depth)
raise "Invalid depth level: #{depth.inspect}"
end
unless input.is_a?(Date) || input.is_a?(Time)
raise "Invalid input type: #{input.inspect}"
end
days_passed = (Date.today - Date.parse(input.to_s)).to_i
time_ago_to_now(days_passed, depth)
end
private
# Days passed to time ago sentence
def time_ago_to_now(days_passed, depth)
return "today" if days_passed == 0
return "yesterday" if days_passed == 1
return "tomorrow" if days_passed == -1
future = days_passed < 0
slots = build_time_ago_slots(days_passed.abs, depth)
sentence = to_sentence(slots)
if future
"in #{sentence}"
else
"#{sentence} ago"
end
end
# Builds time ranges: ['1 month', '5 days']
# - days_passed: integer in absolute
# - depth: level of detail
# - current_slots: built time slots
def build_time_ago_slots(days_passed, depth, current_slots = [])
return current_slots if depth == 0 || days_passed == 0
time_range = days_to_time_range(days_passed)
days = DAYS_PER[time_range]
num_elems = days_passed / days
range_type = if num_elems == 1
time_range.to_s[0...-1] # singularize
else
time_range.to_s
end
current_slots << "#{num_elems} #{range_type}"
pending_days = days_passed - (num_elems*days)
build_time_ago_slots(pending_days, depth - 1, current_slots)
end
# Number of days to minimum period time which can be grouped
def days_to_time_range(days_passed)
case days_passed.abs
when 0...7
:days
when 7...31
:weeks
when 31...365
:months
else
:years
end
end
# Validate if allowed level of detail
def depth_allowed?(depth)
(1..MAX_DEPTH_LEVEL).include?(depth)
end
# Array to sentence: ['1 month', '1 week', '5 days'] => "1 month, 1 week and 5 days"
def to_sentence(slots)
if slots.length == 1
slots[0]
else
"#{slots[0...-1].join(', ')} and #{slots[-1]}"
end
end
end
end
Liquid::Template.register_filter(Jekyll::Timeago)