--- /dev/null
+require 'ferret'
+
+module Redwood
+
+class FerretIndex < BaseIndex
+
++ HookManager.register "custom-search", <<EOS
++Executes before a string search is applied to the index,
++returning a new search string.
++Variables:
++ subs: The string being searched.
++EOS
++
+ def initialize dir=BASE_DIR
+ super
+
+ @index_mutex = Monitor.new
+ wsa = Ferret::Analysis::WhiteSpaceAnalyzer.new false
+ sa = Ferret::Analysis::StandardAnalyzer.new [], true
+ @analyzer = Ferret::Analysis::PerFieldAnalyzer.new wsa
+ @analyzer[:body] = sa
+ @analyzer[:subject] = sa
+ @qparser ||= Ferret::QueryParser.new :default_field => :body, :analyzer => @analyzer, :or_default => false
+ end
+
+ def load_index dir=File.join(@dir, "ferret")
+ if File.exists? dir
+ debug "loading index..."
+ @index_mutex.synchronize do
+ @index = Ferret::Index::Index.new(:path => dir, :analyzer => @analyzer, :id_field => 'message_id')
+ debug "loaded index of #{@index.size} messages"
+ end
+ else
+ debug "creating index..."
+ @index_mutex.synchronize do
+ field_infos = Ferret::Index::FieldInfos.new :store => :yes
+ field_infos.add_field :message_id, :index => :untokenized
+ field_infos.add_field :source_id
+ field_infos.add_field :source_info
+ field_infos.add_field :date, :index => :untokenized
+ field_infos.add_field :body
+ field_infos.add_field :label
+ field_infos.add_field :attachments
+ field_infos.add_field :subject
+ field_infos.add_field :from
+ field_infos.add_field :to
+ field_infos.add_field :refs
+ field_infos.add_field :snippet, :index => :no, :term_vector => :no
+ field_infos.create_index dir
+ @index = Ferret::Index::Index.new(:path => dir, :analyzer => @analyzer, :id_field => 'message_id')
+ end
+ end
+ end
+
+ def add_message m; sync_message m end
+ def update_message m; sync_message m end
+ def update_message_state m; sync_message m end
+
+ def sync_message m, opts={}
+ entry = @index[m.id]
+
+ raise "no source info for message #{m.id}" unless m.source && m.source_info
+
+ source_id = if m.source.is_a? Integer
+ m.source
+ else
+ m.source.id or raise "unregistered source #{m.source} (id #{m.source.id.inspect})"
+ end
+
+ snippet = if m.snippet_contains_encrypted_content? && $config[:discard_snippets_from_encrypted_messages]
+ ""
+ else
+ m.snippet
+ end
+
+ ## write the new document to the index. if the entry already exists in the
+ ## index, reuse it (which avoids having to reload the entry from the source,
+ ## which can be quite expensive for e.g. large threads of IMAP actions.)
+ ##
+ ## exception: if the index entry belongs to an earlier version of the
+ ## message, use everything from the new message instead, but union the
+ ## flags. this allows messages sent to mailing lists to have their header
+ ## updated and to have flags set properly.
+ ##
+ ## minor hack: messages in sources with lower ids have priority over
+ ## messages in sources with higher ids. so messages in the inbox will
+ ## override everyone, and messages in the sent box will be overridden
+ ## by everyone else.
+ ##
+ ## written in this manner to support previous versions of the index which
+ ## did not keep around the entry body. upgrading is thus seamless.
+ entry ||= {}
+ labels = m.labels # override because this is the new state, unless...
+
+ ## if we are a later version of a message, ignore what's in the index,
+ ## but merge in the labels.
+ if entry[:source_id] && entry[:source_info] && entry[:label] &&
+ ((entry[:source_id].to_i > source_id) || (entry[:source_info].to_i < m.source_info))
+ labels += entry[:label].to_set_of_symbols
+ #debug "found updated version of message #{m.id}: #{m.subj}"
+ #debug "previous version was at #{entry[:source_id].inspect}:#{entry[:source_info].inspect}, this version at #{source_id.inspect}:#{m.source_info.inspect}"
+ #debug "merged labels are #{labels.inspect} (index #{entry[:label].inspect}, message #{m.labels.inspect})"
+ entry = {}
+ end
+
+ ## if force_overwite is true, ignore what's in the index. this is used
+ ## primarily by sup-sync to force index updates.
+ entry = {} if opts[:force_overwrite]
+
+ d = {
+ :message_id => m.id,
+ :source_id => source_id,
+ :source_info => m.source_info,
+ :date => (entry[:date] || m.date.to_indexable_s),
+ :body => (entry[:body] || m.indexable_content),
+ :snippet => snippet, # always override
+ :label => labels.to_a.join(" "),
+ :attachments => (entry[:attachments] || m.attachments.uniq.join(" ")),
+
+ ## always override :from and :to.
+ ## older versions of Sup would often store the wrong thing in the index
+ ## (because they were canonicalizing email addresses, resulting in the
+ ## wrong name associated with each.) the correct address is read from
+ ## the original header when these messages are opened in thread-view-mode,
+ ## so this allows people to forcibly update the address in the index by
+ ## marking those threads for saving.
+ :from => (m.from ? m.from.indexable_content : ""),
+ :to => (m.to + m.cc + m.bcc).map { |x| x.indexable_content }.join(" "),
+
+ :subject => (entry[:subject] || wrap_subj(Message.normalize_subj(m.subj))),
+ :refs => (entry[:refs] || (m.refs + m.replytos).uniq.join(" ")),
+ }
+
+ @index_mutex.synchronize do
+ @index.delete m.id
+ @index.add_document d
+ end
+ end
+ private :sync_message
+
+ def save_index fn=File.join(@dir, "ferret")
+ # don't have to do anything, apparently
+ end
+
+ def contains_id? id
+ @index_mutex.synchronize { @index.search(Ferret::Search::TermQuery.new(:message_id, id)).total_hits > 0 }
+ end
+
+ def size
+ @index_mutex.synchronize { @index.size }
+ end
+
+ EACH_BY_DATE_NUM = 100
+ def each_id_by_date query={}
+ return if empty? # otherwise ferret barfs ###TODO: remove this once my ferret patch is accepted
+ ferret_query = build_ferret_query query
+ offset = 0
+ while true
+ limit = (query[:limit])? [EACH_BY_DATE_NUM, query[:limit] - offset].min : EACH_BY_DATE_NUM
+ results = @index_mutex.synchronize { @index.search ferret_query, :sort => "date DESC", :limit => limit, :offset => offset }
+ debug "got #{results.total_hits} results for query (offset #{offset}) #{ferret_query.inspect}"
+ results.hits.each do |hit|
+ yield @index_mutex.synchronize { @index[hit.doc][:message_id] }, lambda { build_message hit.doc }
+ end
+ break if query[:limit] and offset >= query[:limit] - limit
+ break if offset >= results.total_hits - limit
+ offset += limit
+ end
+ end
+
+ def num_results_for query={}
+ return 0 if empty? # otherwise ferret barfs ###TODO: remove this once my ferret patch is accepted
+ ferret_query = build_ferret_query query
+ @index_mutex.synchronize { @index.search(ferret_query, :limit => 1).total_hits }
+ end
+
+ SAME_SUBJECT_DATE_LIMIT = 7
+ MAX_CLAUSES = 1000
+ def each_message_in_thread_for m, opts={}
+ #debug "Building thread for #{m.id}: #{m.subj}"
+ messages = {}
+ searched = {}
+ num_queries = 0
+
+ pending = [m.id]
+ if $config[:thread_by_subject] # do subject queries
+ date_min = m.date - (SAME_SUBJECT_DATE_LIMIT * 12 * 3600)
+ date_max = m.date + (SAME_SUBJECT_DATE_LIMIT * 12 * 3600)
+
+ q = Ferret::Search::BooleanQuery.new true
+ sq = Ferret::Search::PhraseQuery.new(:subject)
+ wrap_subj(Message.normalize_subj(m.subj)).split.each do |t|
+ sq.add_term t
+ end
+ q.add_query sq, :must
+ q.add_query Ferret::Search::RangeQuery.new(:date, :>= => date_min.to_indexable_s, :<= => date_max.to_indexable_s), :must
+
+ q = build_ferret_query :qobj => q
+
+ p1 = @index_mutex.synchronize { @index.search(q).hits.map { |hit| @index[hit.doc][:message_id] } }
+ debug "found #{p1.size} results for subject query #{q}"
+
+ p2 = @index_mutex.synchronize { @index.search(q.to_s, :limit => :all).hits.map { |hit| @index[hit.doc][:message_id] } }
+ debug "found #{p2.size} results in string form"
+
+ pending = (pending + p1 + p2).uniq
+ end
+
+ until pending.empty? || (opts[:limit] && messages.size >= opts[:limit])
+ q = Ferret::Search::BooleanQuery.new true
+ # this disappeared in newer ferrets... wtf.
+ # q.max_clause_count = 2048
+
+ lim = [MAX_CLAUSES / 2, pending.length].min
+ pending[0 ... lim].each do |id|
+ searched[id] = true
+ q.add_query Ferret::Search::TermQuery.new(:message_id, id), :should
+ q.add_query Ferret::Search::TermQuery.new(:refs, id), :should
+ end
+ pending = pending[lim .. -1]
+
+ q = build_ferret_query :qobj => q
+
+ num_queries += 1
+ killed = false
+ @index_mutex.synchronize do
+ @index.search_each(q, :limit => :all) do |docid, score|
+ break if opts[:limit] && messages.size >= opts[:limit]
+ if @index[docid][:label].split(/\s+/).include?("killed") && opts[:skip_killed]
+ killed = true
+ break
+ end
+ mid = @index[docid][:message_id]
+ unless messages.member?(mid)
+ #debug "got #{mid} as a child of #{id}"
+ messages[mid] ||= lambda { build_message docid }
+ refs = @index[docid][:refs].split
+ pending += refs.select { |id| !searched[id] }
+ end
+ end
+ end
+ end
+
+ if killed
+ #debug "thread for #{m.id} is killed, ignoring"
+ false
+ else
+ #debug "ran #{num_queries} queries to build thread of #{messages.size} messages for #{m.id}: #{m.subj}" if num_queries > 0
+ messages.each { |mid, builder| yield mid, builder }
+ true
+ end
+ end
+
+ ## builds a message object from a ferret result
+ def build_message docid
+ @index_mutex.synchronize do
+ doc = @index[docid] or return
+
+ source = SourceManager[doc[:source_id].to_i]
+ raise "invalid source #{doc[:source_id]}" unless source
+
+ #puts "building message #{doc[:message_id]} (#{source}##{doc[:source_info]})"
+
+ fake_header = {
+ "date" => Time.at(doc[:date].to_i),
+ "subject" => unwrap_subj(doc[:subject]),
+ "from" => doc[:from],
+ "to" => doc[:to].split.join(", "), # reformat
+ "message-id" => doc[:message_id],
+ "references" => doc[:refs].split.map { |x| "<#{x}>" }.join(" "),
+ }
+
+ m = Message.new :source => source, :source_info => doc[:source_info].to_i,
+ :labels => doc[:label].to_set_of_symbols,
+ :snippet => doc[:snippet]
+ m.parse_header fake_header
+ m
+ end
+ end
+
+ def delete id
+ @index_mutex.synchronize { @index.delete id }
+ end
+
+ def load_contacts emails, h={}
+ q = Ferret::Search::BooleanQuery.new true
+ emails.each do |e|
+ qq = Ferret::Search::BooleanQuery.new true
+ qq.add_query Ferret::Search::TermQuery.new(:from, e), :should
+ qq.add_query Ferret::Search::TermQuery.new(:to, e), :should
+ q.add_query qq
+ end
+ q.add_query Ferret::Search::TermQuery.new(:label, "spam"), :must_not
+
+ debug "contact search: #{q}"
+ contacts = {}
+ num = h[:num] || 20
+ @index_mutex.synchronize do
+ @index.search_each q, :sort => "date DESC", :limit => :all do |docid, score|
+ break if contacts.size >= num
+ #debug "got message #{docid} to: #{@index[docid][:to].inspect} and from: #{@index[docid][:from].inspect}"
+ f = @index[docid][:from]
+ t = @index[docid][:to]
+
+ if AccountManager.is_account_email? f
+ t.split(" ").each { |e| contacts[Person.from_address(e)] = true }
+ else
+ contacts[Person.from_address(f)] = true
+ end
+ end
+ end
+
+ contacts.keys.compact
+ end
+
+ def each_id query={}
+ ferret_query = build_ferret_query query
+ results = @index_mutex.synchronize { @index.search ferret_query, :limit => (query[:limit] || :all) }
+ results.hits.map { |hit| yield @index[hit.doc][:message_id] }
+ end
+
+ def optimize
+ @index_mutex.synchronize { @index.optimize }
+ end
+
+ def source_for_id id
+ entry = @index[id]
+ return unless entry
+ entry[:source_id].to_i
+ end
+
+ class ParseError < StandardError; end
+
+ ## parse a query string from the user. returns a query object
+ ## that can be passed to any index method with a 'query'
+ ## argument, as well as build_ferret_query.
+ ##
+ ## raises a ParseError if something went wrong.
+ def parse_query s
+ query = {}
+
++ subs = HookManager.run("custom-search", :subs => s) || s
+ subs = s.gsub(/\b(to|from):(\S+)\b/) do
+ field, name = $1, $2
+ if(p = ContactManager.contact_for(name))
+ [field, p.email]
+ elsif name == "me"
+ [field, "(" + AccountManager.user_emails.join("||") + ")"]
+ else
+ [field, name]
+ end.join(":")
+ end
+
+ ## if we see a label:deleted or a label:spam term anywhere in the query
+ ## string, we set the extra load_spam or load_deleted options to true.
+ ## bizarre? well, because the query allows arbitrary parenthesized boolean
+ ## expressions, without fully parsing the query, we can't tell whether
+ ## the user is explicitly directing us to search spam messages or not.
+ ## e.g. if the string is -(-(-(-(-label:spam)))), does the user want to
+ ## search spam messages or not?
+ ##
+ ## so, we rely on the fact that turning these extra options ON turns OFF
+ ## the adding of "-label:deleted" or "-label:spam" terms at the very
+ ## final stage of query processing. if the user wants to search spam
+ ## messages, not adding that is the right thing; if he doesn't want to
+ ## search spam messages, then not adding it won't have any effect.
+ query[:load_spam] = true if subs =~ /\blabel:spam\b/
+ query[:load_deleted] = true if subs =~ /\blabel:deleted\b/
+
+ ## gmail style "is" operator
+ subs = subs.gsub(/\b(is|has):(\S+)\b/) do
+ field, label = $1, $2
+ case label
+ when "read"
+ "-label:unread"
+ when "spam"
+ query[:load_spam] = true
+ "label:spam"
+ when "deleted"
+ query[:load_deleted] = true
+ "label:deleted"
+ else
+ "label:#{$2}"
+ end
+ end
+
+ ## gmail style attachments "filename" and "filetype" searches
+ subs = subs.gsub(/\b(filename|filetype):(\((.+?)\)\B|(\S+)\b)/) do
+ field, name = $1, ($3 || $4)
+ case field
+ when "filename"
+ debug "filename: translated #{field}:#{name} to attachments:(#{name.downcase})"
+ "attachments:(#{name.downcase})"
+ when "filetype"
+ debug "filetype: translated #{field}:#{name} to attachments:(*.#{name.downcase})"
+ "attachments:(*.#{name.downcase})"
+ end
+ end
+
+ if $have_chronic
+ subs = subs.gsub(/\b(before|on|in|during|after):(\((.+?)\)\B|(\S+)\b)/) do
+ field, datestr = $1, ($3 || $4)
+ realdate = Chronic.parse datestr, :guess => false, :context => :past
+ if realdate
+ case field
+ when "after"
+ debug "chronic: translated #{field}:#{datestr} to #{realdate.end}"
+ "date:(>= #{sprintf "%012d", realdate.end.to_i})"
+ when "before"
+ debug "chronic: translated #{field}:#{datestr} to #{realdate.begin}"
+ "date:(<= #{sprintf "%012d", realdate.begin.to_i})"
+ else
+ debug "chronic: translated #{field}:#{datestr} to #{realdate}"
+ "date:(<= #{sprintf "%012d", realdate.end.to_i}) date:(>= #{sprintf "%012d", realdate.begin.to_i})"
+ end
+ else
+ raise ParseError, "can't understand date #{datestr.inspect}"
+ end
+ end
+ end
+
+ ## limit:42 restrict the search to 42 results
+ subs = subs.gsub(/\blimit:(\S+)\b/) do
+ lim = $1
+ if lim =~ /^\d+$/
+ query[:limit] = lim.to_i
+ ''
+ else
+ raise ParseError, "non-numeric limit #{lim.inspect}"
+ end
+ end
+
+ begin
+ query[:qobj] = @qparser.parse(subs)
+ query[:text] = s
+ query
+ rescue Ferret::QueryParser::QueryParseException => e
+ raise ParseError, e.message
+ end
+ end
+
+private
+
+ def build_ferret_query query
+ q = Ferret::Search::BooleanQuery.new
+ q.add_query Ferret::Search::MatchAllQuery.new, :must
+ q.add_query query[:qobj], :must if query[:qobj]
+ labels = ([query[:label]] + (query[:labels] || [])).compact
+ labels.each { |t| q.add_query Ferret::Search::TermQuery.new("label", t.to_s), :must }
+ if query[:participants]
+ q2 = Ferret::Search::BooleanQuery.new
+ query[:participants].each do |p|
+ q2.add_query Ferret::Search::TermQuery.new("from", p.email), :should
+ q2.add_query Ferret::Search::TermQuery.new("to", p.email), :should
+ end
+ q.add_query q2, :must
+ end
+
+ q.add_query Ferret::Search::TermQuery.new("label", "spam"), :must_not unless query[:load_spam] || labels.include?(:spam)
+ q.add_query Ferret::Search::TermQuery.new("label", "deleted"), :must_not unless query[:load_deleted] || labels.include?(:deleted)
+ q.add_query Ferret::Search::TermQuery.new("label", "killed"), :must_not if query[:skip_killed]
+
+ q.add_query Ferret::Search::TermQuery.new("source_id", query[:source_id]), :must if query[:source_id]
+ q
+ end
+
+ def wrap_subj subj; "__START_SUBJECT__ #{subj} __END_SUBJECT__"; end
+ def unwrap_subj subj; subj =~ /__START_SUBJECT__ (.*?) __END_SUBJECT__/ && $1; end
+end
+
+end
--- /dev/null
+require 'xapian'
+require 'set'
+
+module Redwood
+
+# This index implementation uses Xapian for searching and GDBM for storage. It
+# tends to be slightly faster than Ferret for indexing and significantly faster
+# for searching due to precomputing thread membership.
+class XapianIndex < BaseIndex
+ STEM_LANGUAGE = "english"
+ INDEX_VERSION = '1'
+
+ ## dates are converted to integers for xapian, and are used for document ids,
+ ## so we must ensure they're reasonably valid. this typically only affect
+ ## spam.
+ MIN_DATE = Time.at 0
+ MAX_DATE = Time.at(2**31-1)
+
++ HookManager.register "custom-search", <<EOS
++Executes before a string search is applied to the index,
++returning a new search string.
++Variables:
++ subs: The string being searched.
++EOS
++
+ def initialize dir=BASE_DIR
+ super
+
+ @index_mutex = Monitor.new
+ end
+
+ def load_index
+ path = File.join(@dir, 'xapian')
+ if File.exists? path
+ @xapian = Xapian::WritableDatabase.new(path, Xapian::DB_OPEN)
+ db_version = @xapian.get_metadata 'version'
+ db_version = '0' if db_version.empty?
+ if db_version != INDEX_VERSION
+ fail "This Sup version expects a v#{INDEX_VERSION} index, but you have an existing v#{db_version} index. Please downgrade to your previous version and dump your labels before upgrading to this version (then run sup-sync --restore)."
+ end
+ else
+ @xapian = Xapian::WritableDatabase.new(path, Xapian::DB_CREATE)
+ @xapian.set_metadata 'version', INDEX_VERSION
+ end
+ @term_generator = Xapian::TermGenerator.new()
+ @term_generator.stemmer = Xapian::Stem.new(STEM_LANGUAGE)
+ @enquire = Xapian::Enquire.new @xapian
+ @enquire.weighting_scheme = Xapian::BoolWeight.new
+ @enquire.docid_order = Xapian::Enquire::ASCENDING
+ end
+
+ def save_index
+ end
+
+ def optimize
+ end
+
+ def size
+ synchronize { @xapian.doccount }
+ end
+
+ def contains_id? id
+ synchronize { find_docid(id) && true }
+ end
+
+ def source_for_id id
+ synchronize { get_entry(id)[:source_id] }
+ end
+
+ def delete id
+ synchronize { @xapian.delete_document mkterm(:msgid, id) }
+ end
+
+ def build_message id
+ entry = synchronize { get_entry id }
+ return unless entry
+
+ source = SourceManager[entry[:source_id]]
+ raise "invalid source #{entry[:source_id]}" unless source
+
+ m = Message.new :source => source, :source_info => entry[:source_info],
+ :labels => entry[:labels], :snippet => entry[:snippet]
+
+ mk_person = lambda { |x| Person.new(*x.reverse!) }
+ entry[:from] = mk_person[entry[:from]]
+ entry[:to].map!(&mk_person)
+ entry[:cc].map!(&mk_person)
+ entry[:bcc].map!(&mk_person)
+
+ m.load_from_index! entry
+ m
+ end
+
+ def add_message m; sync_message m end
+ def update_message m; sync_message m end
+ def update_message_state m; sync_message m end
+
+ def sync_message m, opts={}
+ entry = synchronize { get_entry m.id }
+ snippet = m.snippet
+ entry ||= {}
+ labels = m.labels
+ entry = {} if opts[:force_overwrite]
+
+ d = {
+ :message_id => m.id,
+ :source_id => m.source.id,
+ :source_info => m.source_info,
+ :date => (entry[:date] || m.date),
+ :snippet => snippet,
+ :labels => labels,
+ :from => (entry[:from] || [m.from.email, m.from.name]),
+ :to => (entry[:to] || m.to.map { |p| [p.email, p.name] }),
+ :cc => (entry[:cc] || m.cc.map { |p| [p.email, p.name] }),
+ :bcc => (entry[:bcc] || m.bcc.map { |p| [p.email, p.name] }),
+ :subject => m.subj,
+ :refs => (entry[:refs] || m.refs),
+ :replytos => (entry[:replytos] || m.replytos),
+ }
+
+ labels.each { |l| LabelManager << l }
+
+ synchronize do
+ index_message m, d, opts
+ end
+ true
+ end
+ private :sync_message
+
+ def num_results_for query={}
+ xapian_query = build_xapian_query query
+ matchset = run_query xapian_query, 0, 0, 100
+ matchset.matches_estimated
+ end
+
+ EACH_ID_PAGE = 100
+ def each_id query={}
+ offset = 0
+ page = EACH_ID_PAGE
+
+ xapian_query = build_xapian_query query
+ while true
+ ids = run_query_ids xapian_query, offset, (offset+page)
+ ids.each { |id| yield id }
+ break if ids.size < page
+ offset += page
+ end
+ end
+
+ def each_id_by_date query={}
+ each_id(query) { |id| yield id, lambda { build_message id } }
+ end
+
+ def each_message_in_thread_for m, opts={}
+ # TODO thread by subject
+ # TODO handle killed threads
+ return unless doc = find_doc(m.id)
+ queue = doc.value(THREAD_VALUENO).split(',')
+ msgids = [m.id]
+ seen_threads = Set.new
+ seen_messages = Set.new [m.id]
+ while not queue.empty?
+ thread_id = queue.pop
+ next if seen_threads.member? thread_id
+ return false if thread_killed? thread_id
+ seen_threads << thread_id
+ docs = term_docids(mkterm(:thread, thread_id)).map { |x| @xapian.document x }
+ docs.each do |doc|
+ msgid = doc.value MSGID_VALUENO
+ next if seen_messages.member? msgid
+ msgids << msgid
+ seen_messages << msgid
+ queue.concat doc.value(THREAD_VALUENO).split(',')
+ end
+ end
+ msgids.each { |id| yield id, lambda { build_message id } }
+ true
+ end
+
+ def load_contacts emails, opts={}
+ contacts = Set.new
+ num = opts[:num] || 20
+ each_id_by_date :participants => emails do |id,b|
+ break if contacts.size >= num
+ m = b.call
+ ([m.from]+m.to+m.cc+m.bcc).compact.each { |p| contacts << [p.name, p.email] }
+ end
+ contacts.to_a.compact.map { |n,e| Person.new n, e }[0...num]
+ end
+
+ # TODO share code with the Ferret index
+ def parse_query s
+ query = {}
+
++ subs = HookManager.run("custom-search", :subs => s) || s
+ subs = s.gsub(/\b(to|from):(\S+)\b/) do
+ field, name = $1, $2
+ if(p = ContactManager.contact_for(name))
+ [field, p.email]
+ elsif name == "me"
+ [field, "(" + AccountManager.user_emails.join("||") + ")"]
+ else
+ [field, name]
+ end.join(":")
+ end
+
+ ## if we see a label:deleted or a label:spam term anywhere in the query
+ ## string, we set the extra load_spam or load_deleted options to true.
+ ## bizarre? well, because the query allows arbitrary parenthesized boolean
+ ## expressions, without fully parsing the query, we can't tell whether
+ ## the user is explicitly directing us to search spam messages or not.
+ ## e.g. if the string is -(-(-(-(-label:spam)))), does the user want to
+ ## search spam messages or not?
+ ##
+ ## so, we rely on the fact that turning these extra options ON turns OFF
+ ## the adding of "-label:deleted" or "-label:spam" terms at the very
+ ## final stage of query processing. if the user wants to search spam
+ ## messages, not adding that is the right thing; if he doesn't want to
+ ## search spam messages, then not adding it won't have any effect.
+ query[:load_spam] = true if subs =~ /\blabel:spam\b/
+ query[:load_deleted] = true if subs =~ /\blabel:deleted\b/
+
+ ## gmail style "is" operator
+ subs = subs.gsub(/\b(is|has):(\S+)\b/) do
+ field, label = $1, $2
+ case label
+ when "read"
+ "-label:unread"
+ when "spam"
+ query[:load_spam] = true
+ "label:spam"
+ when "deleted"
+ query[:load_deleted] = true
+ "label:deleted"
+ else
+ "label:#{$2}"
+ end
+ end
+
+ ## gmail style attachments "filename" and "filetype" searches
+ subs = subs.gsub(/\b(filename|filetype):(\((.+?)\)\B|(\S+)\b)/) do
+ field, name = $1, ($3 || $4)
+ case field
+ when "filename"
+ debug "filename: translated #{field}:#{name} to attachment:\"#{name.downcase}\""
+ "attachment:\"#{name.downcase}\""
+ when "filetype"
+ debug "filetype: translated #{field}:#{name} to attachment_extension:#{name.downcase}"
+ "attachment_extension:#{name.downcase}"
+ end
+ end
+
+ if $have_chronic
+ lastdate = 2<<32 - 1
+ firstdate = 0
+ subs = subs.gsub(/\b(before|on|in|during|after):(\((.+?)\)\B|(\S+)\b)/) do
+ field, datestr = $1, ($3 || $4)
+ realdate = Chronic.parse datestr, :guess => false, :context => :past
+ if realdate
+ case field
+ when "after"
+ debug "chronic: translated #{field}:#{datestr} to #{realdate.end}"
+ "date:#{realdate.end.to_i}..#{lastdate}"
+ when "before"
+ debug "chronic: translated #{field}:#{datestr} to #{realdate.begin}"
+ "date:#{firstdate}..#{realdate.end.to_i}"
+ else
+ debug "chronic: translated #{field}:#{datestr} to #{realdate}"
+ "date:#{realdate.begin.to_i}..#{realdate.end.to_i}"
+ end
+ else
+ raise ParseError, "can't understand date #{datestr.inspect}"
+ end
+ end
+ end
+
+ ## limit:42 restrict the search to 42 results
+ subs = subs.gsub(/\blimit:(\S+)\b/) do
+ lim = $1
+ if lim =~ /^\d+$/
+ query[:limit] = lim.to_i
+ ''
+ else
+ raise ParseError, "non-numeric limit #{lim.inspect}"
+ end
+ end
+
+ qp = Xapian::QueryParser.new
+ qp.database = @xapian
+ qp.stemmer = Xapian::Stem.new(STEM_LANGUAGE)
+ qp.stemming_strategy = Xapian::QueryParser::STEM_SOME
+ qp.default_op = Xapian::Query::OP_AND
+ qp.add_valuerangeprocessor(Xapian::NumberValueRangeProcessor.new(DATE_VALUENO, 'date:', true))
+ NORMAL_PREFIX.each { |k,v| qp.add_prefix k, v }
+ BOOLEAN_PREFIX.each { |k,v| qp.add_boolean_prefix k, v }
+ xapian_query = qp.parse_query(subs, Xapian::QueryParser::FLAG_PHRASE|Xapian::QueryParser::FLAG_BOOLEAN|Xapian::QueryParser::FLAG_LOVEHATE|Xapian::QueryParser::FLAG_WILDCARD, PREFIX['body'])
+
+ raise ParseError if xapian_query.nil? or xapian_query.empty?
+ query[:qobj] = xapian_query
+ query[:text] = s
+ query
+ end
+
+ private
+
+ # Stemmed
+ NORMAL_PREFIX = {
+ 'subject' => 'S',
+ 'body' => 'B',
+ 'from_name' => 'FN',
+ 'to_name' => 'TN',
+ 'name' => 'N',
+ 'attachment' => 'A',
+ }
+
+ # Unstemmed
+ BOOLEAN_PREFIX = {
+ 'type' => 'K',
+ 'from_email' => 'FE',
+ 'to_email' => 'TE',
+ 'email' => 'E',
+ 'date' => 'D',
+ 'label' => 'L',
+ 'source_id' => 'I',
+ 'attachment_extension' => 'O',
+ 'msgid' => 'Q',
+ 'thread' => 'H',
+ 'ref' => 'R',
+ }
+
+ PREFIX = NORMAL_PREFIX.merge BOOLEAN_PREFIX
+
+ MSGID_VALUENO = 0
+ THREAD_VALUENO = 1
+ DATE_VALUENO = 2
+
+ MAX_TERM_LENGTH = 245
+
+ # Xapian can very efficiently sort in ascending docid order. Sup always wants
+ # to sort by descending date, so this method maps between them. In order to
+ # handle multiple messages per second, we use a logistic curve centered
+ # around MIDDLE_DATE so that the slope (docid/s) is greatest in this time
+ # period. A docid collision is not an error - the code will pick the next
+ # smallest unused one.
+ DOCID_SCALE = 2.0**32
+ TIME_SCALE = 2.0**27
+ MIDDLE_DATE = Time.gm(2011)
+ def assign_docid m, truncated_date
+ t = (truncated_date.to_i - MIDDLE_DATE.to_i).to_f
+ docid = (DOCID_SCALE - DOCID_SCALE/(Math::E**(-(t/TIME_SCALE)) + 1)).to_i
+ while docid > 0 and docid_exists? docid
+ docid -= 1
+ end
+ docid > 0 ? docid : nil
+ end
+
+ # XXX is there a better way?
+ def docid_exists? docid
+ begin
+ @xapian.doclength docid
+ true
+ rescue RuntimeError #Xapian::DocNotFoundError
+ raise unless $!.message =~ /DocNotFoundError/
+ false
+ end
+ end
+
+ def term_docids term
+ @xapian.postlist(term).map { |x| x.docid }
+ end
+
+ def find_docid id
+ docids = term_docids(mkterm(:msgid,id))
+ fail unless docids.size <= 1
+ docids.first
+ end
+
+ def find_doc id
+ return unless docid = find_docid(id)
+ @xapian.document docid
+ end
+
+ def get_id docid
+ return unless doc = @xapian.document(docid)
+ doc.value MSGID_VALUENO
+ end
+
+ def get_entry id
+ return unless doc = find_doc(id)
+ Marshal.load doc.data
+ end
+
+ def thread_killed? thread_id
+ not run_query(Q.new(Q::OP_AND, mkterm(:thread, thread_id), mkterm(:label, :Killed)), 0, 1).empty?
+ end
+
+ def synchronize &b
+ @index_mutex.synchronize &b
+ end
+
+ def run_query xapian_query, offset, limit, checkatleast=0
+ synchronize do
+ @enquire.query = xapian_query
+ @enquire.mset(offset, limit-offset, checkatleast)
+ end
+ end
+
+ def run_query_ids xapian_query, offset, limit
+ matchset = run_query xapian_query, offset, limit
+ matchset.matches.map { |r| r.document.value MSGID_VALUENO }
+ end
+
+ Q = Xapian::Query
+ def build_xapian_query opts
+ labels = ([opts[:label]] + (opts[:labels] || [])).compact
+ neglabels = [:spam, :deleted, :killed].reject { |l| (labels.include? l) || opts.member?("load_#{l}".intern) }
+ pos_terms, neg_terms = [], []
+
+ pos_terms << mkterm(:type, 'mail')
+ pos_terms.concat(labels.map { |l| mkterm(:label,l) })
+ pos_terms << opts[:qobj] if opts[:qobj]
+ pos_terms << mkterm(:source_id, opts[:source_id]) if opts[:source_id]
+
+ if opts[:participants]
+ participant_terms = opts[:participants].map { |p| mkterm(:email,:any, (Redwood::Person === p) ? p.email : p) }
+ pos_terms << Q.new(Q::OP_OR, participant_terms)
+ end
+
+ neg_terms.concat(neglabels.map { |l| mkterm(:label,l) })
+
+ pos_query = Q.new(Q::OP_AND, pos_terms)
+ neg_query = Q.new(Q::OP_OR, neg_terms)
+
+ if neg_query.empty?
+ pos_query
+ else
+ Q.new(Q::OP_AND_NOT, [pos_query, neg_query])
+ end
+ end
+
+ def index_message m, entry, opts
+ terms = []
+ text = []
+
+ subject_text = m.indexable_subject
+ body_text = m.indexable_body
+
+ # Person names are indexed with several prefixes
+ person_termer = lambda do |d|
+ lambda do |p|
+ ["#{d}_name", "name", "body"].each do |x|
+ text << [p.name, PREFIX[x]]
+ end if p.name
+ [d, :any].each { |x| terms << mkterm(:email, x, p.email) }
+ end
+ end
+
+ person_termer[:from][m.from] if m.from
+ (m.to+m.cc+m.bcc).each(&(person_termer[:to]))
+
+ terms << mkterm(:date,m.date) if m.date
+ m.labels.each { |t| terms << mkterm(:label,t) }
+ terms << mkterm(:type, 'mail')
+ terms << mkterm(:msgid, m.id)
+ terms << mkterm(:source_id, m.source.id)
+ m.attachments.each do |a|
+ a =~ /\.(\w+)$/ or next
+ t = mkterm(:attachment_extension, $1)
+ terms << t
+ end
+
+ ## Thread membership
+ children = term_docids(mkterm(:ref, m.id)).map { |docid| @xapian.document docid }
+ parent_ids = m.refs + m.replytos
+ parents = parent_ids.map { |id| find_doc id }.compact
+ thread_members = SavingHash.new { [] }
+ (children + parents).each do |doc2|
+ thread_ids = doc2.value(THREAD_VALUENO).split ','
+ thread_ids.each { |thread_id| thread_members[thread_id] << doc2 }
+ end
+
+ thread_ids = thread_members.empty? ? [m.id] : thread_members.keys
+
+ thread_ids.each { |thread_id| terms << mkterm(:thread, thread_id) }
+ parent_ids.each do |ref|
+ terms << mkterm(:ref, ref)
+ end
+
+ # Full text search content
+ text << [subject_text, PREFIX['subject']]
+ text << [subject_text, PREFIX['body']]
+ text << [body_text, PREFIX['body']]
+ m.attachments.each { |a| text << [a, PREFIX['attachment']] }
+
+ truncated_date = if m.date < MIN_DATE
+ debug "warning: adjusting too-low date #{m.date} for indexing"
+ MIN_DATE
+ elsif m.date > MAX_DATE
+ debug "warning: adjusting too-high date #{m.date} for indexing"
+ MAX_DATE
+ else
+ m.date
+ end
+
+ # Date value for range queries
+ date_value = begin
+ Xapian.sortable_serialise truncated_date.to_i
+ rescue TypeError
+ Xapian.sortable_serialise 0
+ end
+
+ docid = nil
+ unless doc = find_doc(m.id)
+ doc = Xapian::Document.new
+ if not docid = assign_docid(m, truncated_date)
+ # Could be triggered by spam
+ Redwood::log "warning: docid underflow, dropping #{m.id.inspect}"
+ return
+ end
+ else
+ doc.clear_terms
+ doc.clear_values
+ docid = doc.docid
+ end
+
+ @term_generator.document = doc
+ text.each { |text,prefix| @term_generator.index_text text, 1, prefix }
+ terms.each { |term| doc.add_term term if term.length <= MAX_TERM_LENGTH }
+ doc.add_value MSGID_VALUENO, m.id
+ doc.add_value THREAD_VALUENO, (thread_ids * ',')
+ doc.add_value DATE_VALUENO, date_value
+ doc.data = Marshal.dump entry
+
+ @xapian.replace_document docid, doc
+ end
+
+ # Construct a Xapian term
+ def mkterm type, *args
+ case type
+ when :label
+ PREFIX['label'] + args[0].to_s.downcase
+ when :type
+ PREFIX['type'] + args[0].to_s.downcase
+ when :date
+ PREFIX['date'] + args[0].getutc.strftime("%Y%m%d%H%M%S")
+ when :email
+ case args[0]
+ when :from then PREFIX['from_email']
+ when :to then PREFIX['to_email']
+ when :any then PREFIX['email']
+ else raise "Invalid email term type #{args[0]}"
+ end + args[1].to_s.downcase
+ when :source_id
+ PREFIX['source_id'] + args[0].to_s.downcase
+ when :attachment_extension
+ PREFIX['attachment_extension'] + args[0].to_s.downcase
+ when :msgid, :ref, :thread
+ PREFIX[type.to_s] + args[0][0...(MAX_TERM_LENGTH-1)]
+ else
+ raise "Invalid term type #{type}"
+ end
+ end
+
+end
+
+end
projects / sup / commitdiff