15 lines
627 B
Ruby
15 lines
627 B
Ruby
module PoolVersionsHelper
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def pool_version_diff(current)
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prev = PoolVersion.where(["pool_id = ? and id < ?", current.pool_id, current.id]).order("id desc").first
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if prev.nil?
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return current.post_id_array.map {|x| content_tag("ins", "+#{x}")}.join(" ").html_safe
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end
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added = current.post_id_array - prev.post_id_array
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removed = prev.post_id_array - current.post_id_array
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added.map {|x| '<ins>+<a href="/posts/' + x.to_s + '">' + x.to_s + '</a></ins>'}.join(" ").html_safe + removed.map {|x| '<del>–<a href="/posts/' + x.to_s + '">' + x.to_s + '</a></del>'}.join(" ").html_safe
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end
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end
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