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module ChangesHelper

MimeFormat = "application/vnd.github.%s+json".freeze

# Public: Filters the change items out. If a version is given, show only the

# items related to that version.

# version - Optional String version key.

# Returns an Array of all 30 Nanoc::Item objects, sorted in reverse

# chronological order.

def api_changes(version = nil)

changes = @items.select { |item| item[:kind] == 'change' }

if version

version_s = version.to_s

changes.select { |item| item[:api_version] == version_s }

else

changes

end.sort! do |x, y|

attribute_to_time(y[:created_at]) <=> attribute_to_time(x[:created_at])

end

# Public

def current_api

@current_api ||= (api_versions[-2] || api_versions.first).first

end

# Public

def upcoming_api

@upcoming_api ||= begin

version, date = api_versions.last

version unless date

end

# Public

def current_api?(version)

@api_current_checks ||= {}

if @api_current_checks.key?(version)

@api_current_checks[version]

end

@api_current_checks[version] = version == current_api

end

# Public

def no_current_api_versions?(*versions)

versions.none? { |v| current_api?(v) }

end

# Public

def api_released_at(version)

@api_releases ||= {}

if @api_releases.key?(version)

@api_releases[version]

end

@api_releases[version] = begin

pair = api_versions.detect do |(name, date)|

name == version

end

pair ? pair[1] : nil

end

# Public

def api_mimetype_listing(version)

version_s = version.to_s

mime = mimetype_for version_s

if time = api_released_at(version_s)

mime << " ("

mime << "Current, " if current_api?(version_s)

mime << strftime(time)

mime << ")"

else

mime

end

# Internal

def mimetype_for(version)

MimeFormat % version.to_s

end

# Internal

def api_versions

@api_versions ||= Array(@site.config[:api_versions])

end

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