mirror of
https://github.com/discourse/discourse.git
synced 2024-11-24 00:51:03 +08:00
113 lines
2.2 KiB
Ruby
113 lines
2.2 KiB
Ruby
require_dependency "discourse_diff"
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class PostRevision < ActiveRecord::Base
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belongs_to :post
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belongs_to :user
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serialize :modifications, Hash
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def body_changes
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changes_for("cooked", "raw")
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end
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def category_changes
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{
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previous_category_id: previous("category_id"),
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current_category_id: current("category_id"),
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}
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end
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def title_changes
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changes_for("title", nil, true)
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end
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def changes_for(name, markdown=nil, wrap=false)
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prev = previous(name)
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cur = current(name)
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if wrap
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prev = "<div>#{CGI::escapeHTML(prev)}</div>"
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cur = "<div>#{CGI::escapeHTML(cur)}</div>"
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end
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diff = DiscourseDiff.new(prev, cur)
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result = {
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inline: diff.inline_html,
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side_by_side: diff.side_by_side_html
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}
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if markdown
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diff = DiscourseDiff.new(previous(markdown), current(markdown))
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result[:side_by_side_markdown] = diff.side_by_side_markdown
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end
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result
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end
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def previous(field)
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lookup_with_fallback(field, 0)
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end
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def current(field)
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lookup_with_fallback(field, 1)
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end
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def previous_revisions
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@previous_revs ||=
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PostRevision.where("post_id = ? AND number < ?",
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post_id, number
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)
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.order("number desc")
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.to_a
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end
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def has_topic_data?
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post && post.post_number == 1
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end
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def lookup_with_fallback(field, index)
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unless val = lookup(field, index)
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previous_revisions.each do |v|
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break if val = v.lookup(field, 1)
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end
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end
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unless val
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if ["cooked","raw"].include?(field)
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val = post.send(field)
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else
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val = post.topic.send(field)
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end
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end
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val
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end
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def lookup(field, index)
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if mod = modifications[field]
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mod[index]
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end
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end
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end
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# == Schema Information
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#
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# Table name: post_revisions
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#
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# id :integer not null, primary key
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# user_id :integer
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# post_id :integer
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# modifications :text
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# number :integer
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# created_at :datetime
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# updated_at :datetime
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#
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# Indexes
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#
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# index_post_revisions_on_post_id (post_id)
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# index_post_revisions_on_post_id_and_number (post_id,number)
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#
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