1 ## the index structure for redwood. interacts with ferret.
11 Redwood::log "optional 'chronic' library not found (run 'gem install chronic' to install)"
18 class LockError < StandardError
23 def method_missing m; @h[m.to_s] end
28 ## these two accessors should ONLY be used by single-threaded programs.
29 ## otherwise you will have a naughty ferret on your hands.
33 def initialize dir=BASE_DIR
34 @index_mutex = Monitor.new
38 @sources_dirty = false
39 @source_mutex = Monitor.new
41 wsa = Ferret::Analysis::WhiteSpaceAnalyzer.new false
42 sa = Ferret::Analysis::StandardAnalyzer.new [], true
43 @analyzer = Ferret::Analysis::PerFieldAnalyzer.new wsa
45 @analyzer[:subject] = sa
46 @qparser ||= Ferret::QueryParser.new :default_field => :body, :analyzer => @analyzer, :or_default => false
47 @lock = Lockfile.new lockfile, :retries => 0, :max_age => nil
49 self.class.i_am_the_instance self
52 def lockfile; File.join @dir, "lock" end
55 Redwood::log "locking #{lockfile}..."
58 rescue Lockfile::MaxTriesLockError
59 raise LockError, @lock.lockinfo_on_disk
63 def start_lock_update_thread
64 @lock_update_thread = Redwood::reporting_thread("lock update") do
72 def stop_lock_update_thread
73 @lock_update_thread.kill if @lock_update_thread
74 @lock_update_thread = nil
77 def possibly_pluralize number_of, kind
78 "#{number_of} #{kind}" +
79 if number_of == 1 then "" else "s" end
82 def fancy_lock_error_message_for e
83 secs = (Time.now - e.mtime).to_i
87 possibly_pluralize secs , "second"
89 possibly_pluralize mins, "minute"
93 Error: the sup index is locked by another process! User '#{e.user}' on
94 host '#{e.host}' is running #{e.pname} with pid #{e.pid}. The process was alive
102 rescue LockError => e
103 $stderr.puts fancy_lock_error_message_for(e)
106 You can wait for the process to finish, or, if it crashed and left a
107 stale lock file behind, you can manually delete #{@lock.path}.
114 if @lock && @lock.locked?
115 Redwood::log "unlocking #{lockfile}..."
126 Redwood::log "saving index and sources..."
127 FileUtils.mkdir_p @dir unless File.exists? @dir
132 def add_source source
133 @source_mutex.synchronize do
134 raise "duplicate source!" if @sources.include? source
135 @sources_dirty = true
136 max = @sources.max_of { |id, s| s.is_a?(DraftLoader) || s.is_a?(SentLoader) ? 0 : id }
137 source.id ||= (max || 0) + 1
138 ##source.id += 1 while @sources.member? source.id
139 @sources[source.id] = source
144 ## favour the inbox by listing non-archived sources first
145 @source_mutex.synchronize { @sources.values }.sort_by { |s| s.id }.partition { |s| !s.archived? }.flatten
148 def source_for uri; sources.find { |s| s.is_source_for? uri }; end
149 def usual_sources; sources.find_all { |s| s.usual? }; end
151 def load_index dir=File.join(@dir, "ferret")
153 Redwood::log "loading index..."
154 @index_mutex.synchronize do
155 @index = Ferret::Index::Index.new(:path => dir, :analyzer => @analyzer)
156 Redwood::log "loaded index of #{@index.size} messages"
159 Redwood::log "creating index..."
160 @index_mutex.synchronize do
161 field_infos = Ferret::Index::FieldInfos.new :store => :yes
162 field_infos.add_field :message_id, :index => :untokenized
163 field_infos.add_field :source_id
164 field_infos.add_field :source_info
165 field_infos.add_field :date, :index => :untokenized
166 field_infos.add_field :body
167 field_infos.add_field :label
168 field_infos.add_field :attachments
169 field_infos.add_field :subject
170 field_infos.add_field :from
171 field_infos.add_field :to
172 field_infos.add_field :refs
173 field_infos.add_field :snippet, :index => :no, :term_vector => :no
174 field_infos.create_index dir
175 @index = Ferret::Index::Index.new(:path => dir, :analyzer => @analyzer)
180 ## Syncs the message to the index: deleting if it's already there,
181 ## and adding either way. Index state will be determined by m.labels.
183 ## docid and entry can be specified if they're already known.
184 def sync_message m, docid=nil, entry=nil, opts={}
185 docid, entry = load_entry_for_id m.id unless docid && entry
187 raise "no source info for message #{m.id}" unless m.source && m.source_info
188 @index_mutex.synchronize do
189 raise "trying to delete non-corresponding entry #{docid} with index message-id #{@index[docid][:message_id].inspect} and parameter message id #{m.id.inspect}" if docid && @index[docid][:message_id] != m.id
193 if m.source.is_a? Integer
196 m.source.id or raise "unregistered source #{m.source} (id #{m.source.id.inspect})"
200 if m.snippet_contains_encrypted_content? && $config[:discard_snippets_from_encrypted_messages]
206 ## write the new document to the index. if the entry already exists in the
207 ## index, reuse it (which avoids having to reload the entry from the source,
208 ## which can be quite expensive for e.g. large threads of IMAP actions.)
210 ## exception: if the index entry belongs to an earlier version of the
211 ## message, use everything from the new message instead, but union the
212 ## flags. this allows messages sent to mailing lists to have their header
213 ## updated and to have flags set properly.
215 ## minor hack: messages in sources with lower ids have priority over
216 ## messages in sources with higher ids. so messages in the inbox will
217 ## override everyone, and messages in the sent box will be overridden
220 ## written in this manner to support previous versions of the index which
221 ## did not keep around the entry body. upgrading is thus seamless.
223 labels = m.labels.uniq # override because this is the new state, unless...
225 ## if we are a later version of a message, ignore what's in the index,
226 ## but merge in the labels.
227 if entry[:source_id] && entry[:source_info] && entry[:label] &&
228 ((entry[:source_id].to_i > source_id) || (entry[:source_info].to_i < m.source_info))
229 labels = (entry[:label].split(/\s+/).map { |l| l.intern } + m.labels).uniq
230 #Redwood::log "found updated version of message #{m.id}: #{m.subj}"
231 #Redwood::log "previous version was at #{entry[:source_id].inspect}:#{entry[:source_info].inspect}, this version at #{source_id.inspect}:#{m.source_info.inspect}"
232 #Redwood::log "merged labels are #{labels.inspect} (index #{entry[:label].inspect}, message #{m.labels.inspect})"
236 ## if force_overwite is true, ignore what's in the index. this is used
237 ## primarily by sup-sync to force index updates.
238 entry = {} if opts[:force_overwrite]
242 :source_id => source_id,
243 :source_info => m.source_info,
244 :date => (entry[:date] || m.date.to_indexable_s),
245 :body => (entry[:body] || m.indexable_content),
246 :snippet => snippet, # always override
247 :label => labels.uniq.join(" "),
248 :attachments => (entry[:attachments] || m.attachments.uniq.join(" ")),
249 :from => (entry[:from] || (m.from ? m.from.indexable_content : "")),
250 :to => (entry[:to] || (m.to + m.cc + m.bcc).map { |x| x.indexable_content }.join(" ")),
251 :subject => (entry[:subject] || wrap_subj(Message.normalize_subj(m.subj))),
252 :refs => (entry[:refs] || (m.refs + m.replytos).uniq.join(" ")),
255 @index_mutex.synchronize do
256 @index.delete docid if docid
257 @index.add_document d
260 docid, entry = load_entry_for_id m.id
261 ## this hasn't been triggered in a long time. TODO: decide whether it's still a problem.
262 raise "just added message #{m.id.inspect} but couldn't find it in a search" unless docid
266 def save_index fn=File.join(@dir, "ferret")
267 # don't have to do anything, apparently
271 @index_mutex.synchronize { @index.search(Ferret::Search::TermQuery.new(:message_id, id)).total_hits > 0 }
273 def contains? m; contains_id? m.id end
274 def size; @index_mutex.synchronize { @index.size } end
275 def empty?; size == 0 end
277 ## you should probably not call this on a block that doesn't break
278 ## rather quickly because the results can be very large.
279 EACH_BY_DATE_NUM = 100
280 def each_id_by_date opts={}
281 return if empty? # otherwise ferret barfs ###TODO: remove this once my ferret patch is accepted
282 query = build_query opts
285 limit = (opts[:limit])? [EACH_BY_DATE_NUM, opts[:limit] - offset].min : EACH_BY_DATE_NUM
286 results = @index_mutex.synchronize { @index.search query, :sort => "date DESC", :limit => limit, :offset => offset }
287 Redwood::log "got #{results.total_hits} results for query (offset #{offset}) #{query.inspect}"
288 results.hits.each do |hit|
289 yield @index_mutex.synchronize { @index[hit.doc][:message_id] }, lambda { build_message hit.doc }
291 break if opts[:limit] and offset >= opts[:limit] - limit
292 break if offset >= results.total_hits - limit
297 def num_results_for opts={}
298 return 0 if empty? # otherwise ferret barfs ###TODO: remove this once my ferret patch is accepted
301 @index_mutex.synchronize { @index.search(q, :limit => 1).total_hits }
304 ## yield all messages in the thread containing 'm' by repeatedly
305 ## querying the index. yields pairs of message ids and
306 ## message-building lambdas, so that building an unwanted message
307 ## can be skipped in the block if desired.
309 ## only two options, :limit and :skip_killed. if :skip_killed is
310 ## true, stops loading any thread if a message with a :killed flag
312 SAME_SUBJECT_DATE_LIMIT = 7
314 def each_message_in_thread_for m, opts={}
315 #Redwood::log "Building thread for #{m.id}: #{m.subj}"
321 if $config[:thread_by_subject] # do subject queries
322 date_min = m.date - (SAME_SUBJECT_DATE_LIMIT * 12 * 3600)
323 date_max = m.date + (SAME_SUBJECT_DATE_LIMIT * 12 * 3600)
325 q = Ferret::Search::BooleanQuery.new true
326 sq = Ferret::Search::PhraseQuery.new(:subject)
327 wrap_subj(Message.normalize_subj(m.subj)).split(/\s+/).each do |t|
330 q.add_query sq, :must
331 q.add_query Ferret::Search::RangeQuery.new(:date, :>= => date_min.to_indexable_s, :<= => date_max.to_indexable_s), :must
333 q = build_query :qobj => q
335 p1 = @index_mutex.synchronize { @index.search(q).hits.map { |hit| @index[hit.doc][:message_id] } }
336 Redwood::log "found #{p1.size} results for subject query #{q}"
338 p2 = @index_mutex.synchronize { @index.search(q.to_s, :limit => :all).hits.map { |hit| @index[hit.doc][:message_id] } }
339 Redwood::log "found #{p2.size} results in string form"
341 pending = (pending + p1 + p2).uniq
344 until pending.empty? || (opts[:limit] && messages.size >= opts[:limit])
345 q = Ferret::Search::BooleanQuery.new true
346 # this disappeared in newer ferrets... wtf.
347 # q.max_clause_count = 2048
349 lim = [MAX_CLAUSES / 2, pending.length].min
350 pending[0 ... lim].each do |id|
352 q.add_query Ferret::Search::TermQuery.new(:message_id, id), :should
353 q.add_query Ferret::Search::TermQuery.new(:refs, id), :should
355 pending = pending[lim .. -1]
357 q = build_query :qobj => q
361 @index_mutex.synchronize do
362 @index.search_each(q, :limit => :all) do |docid, score|
363 break if opts[:limit] && messages.size >= opts[:limit]
364 if @index[docid][:label].split(/\s+/).include?("killed") && opts[:skip_killed]
368 mid = @index[docid][:message_id]
369 unless messages.member?(mid)
370 #Redwood::log "got #{mid} as a child of #{id}"
371 messages[mid] ||= lambda { build_message docid }
372 refs = @index[docid][:refs].split(" ")
373 pending += refs.select { |id| !searched[id] }
380 Redwood::log "thread for #{m.id} is killed, ignoring"
383 Redwood::log "ran #{num_queries} queries to build thread of #{messages.size + 1} messages for #{m.id}: #{m.subj}" if num_queries > 0
384 messages.each { |mid, builder| yield mid, builder }
389 ## builds a message object from a ferret result
390 def build_message docid
391 @index_mutex.synchronize do
394 source = @source_mutex.synchronize { @sources[doc[:source_id].to_i] }
395 raise "invalid source #{doc[:source_id]}" unless source
397 #puts "building message #{doc[:message_id]} (#{source}##{doc[:source_info]})"
400 "date" => Time.at(doc[:date].to_i),
401 "subject" => unwrap_subj(doc[:subject]),
402 "from" => doc[:from],
403 "to" => doc[:to].split(/\s+/).join(", "), # reformat
404 "message-id" => doc[:message_id],
405 "references" => doc[:refs].split(/\s+/).map { |x| "<#{x}>" }.join(" "),
408 Message.new :source => source, :source_info => doc[:source_info].to_i,
409 :labels => doc[:label].split(" ").map { |s| s.intern },
410 :snippet => doc[:snippet], :header => fake_header
414 def fresh_thread_id; @next_thread_id += 1; end
415 def wrap_subj subj; "__START_SUBJECT__ #{subj} __END_SUBJECT__"; end
416 def unwrap_subj subj; subj =~ /__START_SUBJECT__ (.*?) __END_SUBJECT__/ && $1; end
418 def drop_entry docno; @index_mutex.synchronize { @index.delete docno } end
420 def load_entry_for_id mid
421 @index_mutex.synchronize do
422 results = @index.search Ferret::Search::TermQuery.new(:message_id, mid)
423 return if results.total_hits == 0
424 docid = results.hits[0].doc
425 entry = @index[docid]
426 entry_dup = entry.fields.inject({}) { |h, f| h[f] = entry[f]; h }
431 def load_contacts emails, h={}
432 q = Ferret::Search::BooleanQuery.new true
434 qq = Ferret::Search::BooleanQuery.new true
435 qq.add_query Ferret::Search::TermQuery.new(:from, e), :should
436 qq.add_query Ferret::Search::TermQuery.new(:to, e), :should
439 q.add_query Ferret::Search::TermQuery.new(:label, "spam"), :must_not
441 Redwood::log "contact search: #{q}"
444 @index_mutex.synchronize do
445 @index.search_each q, :sort => "date DESC", :limit => :all do |docid, score|
446 break if contacts.size >= num
447 #Redwood::log "got message #{docid} to: #{@index[docid][:to].inspect} and from: #{@index[docid][:from].inspect}"
448 f = @index[docid][:from]
449 t = @index[docid][:to]
451 if AccountManager.is_account_email? f
452 t.split(" ").each { |e| contacts[Person.from_address(e)] = true }
454 contacts[Person.from_address(f)] = true
459 contacts.keys.compact
462 def load_sources fn=Redwood::SOURCE_FN
463 source_array = (Redwood::load_yaml_obj(fn) || []).map { |o| Recoverable.new o }
464 @source_mutex.synchronize do
465 @sources = Hash[*(source_array).map { |s| [s.id, s] }.flatten]
466 @sources_dirty = false
470 def has_any_from_source_with_label? source, label
471 q = Ferret::Search::BooleanQuery.new
472 q.add_query Ferret::Search::TermQuery.new("source_id", source.id.to_s), :must
473 q.add_query Ferret::Search::TermQuery.new("label", label.to_s), :must
474 @index_mutex.synchronize { @index.search(q, :limit => 1).total_hits > 0 }
479 ## do any specialized parsing
480 ## returns nil and flashes error message if parsing failed
481 def parse_user_query_string s
484 subs = s.gsub(/\b(to|from):(\S+)\b/) do
486 if(p = ContactManager.contact_for(name))
489 [field, "(" + AccountManager.user_emails.join("||") + ")"]
495 ## if we see a label:deleted or a label:spam term anywhere in the query
496 ## string, we set the extra load_spam or load_deleted options to true.
497 ## bizarre? well, because the query allows arbitrary parenthesized boolean
498 ## expressions, without fully parsing the query, we can't tell whether
499 ## the user is explicitly directing us to search spam messages or not.
500 ## e.g. if the string is -(-(-(-(-label:spam)))), does the user want to
501 ## search spam messages or not?
503 ## so, we rely on the fact that turning these extra options ON turns OFF
504 ## the adding of "-label:deleted" or "-label:spam" terms at the very
505 ## final stage of query processing. if the user wants to search spam
506 ## messages, not adding that is the right thing; if he doesn't want to
507 ## search spam messages, then not adding it won't have any effect.
508 extraopts[:load_spam] = true if subs =~ /\blabel:spam\b/
509 extraopts[:load_deleted] = true if subs =~ /\blabel:deleted\b/
511 ## gmail style "is" operator
512 subs = subs.gsub(/\b(is|has):(\S+)\b/) do
513 field, label = $1, $2
518 extraopts[:load_spam] = true
521 extraopts[:load_deleted] = true
528 ## gmail style attachments "filename" and "filetype" searches
529 subs = subs.gsub(/\b(filename|filetype):(\((.+?)\)\B|(\S+)\b)/) do
530 field, name = $1, ($3 || $4)
533 Redwood::log "filename - translated #{field}:#{name} to attachments:(#{name.downcase})"
534 "attachments:(#{name.downcase})"
536 Redwood::log "filetype - translated #{field}:#{name} to attachments:(*.#{name.downcase})"
537 "attachments:(*.#{name.downcase})"
542 chronic_failure = false
543 subs = subs.gsub(/\b(before|on|in|during|after):(\((.+?)\)\B|(\S+)\b)/) do
544 break if chronic_failure
545 field, datestr = $1, ($3 || $4)
546 realdate = Chronic.parse(datestr, :guess => false, :context => :none)
550 Redwood::log "chronic: translated #{field}:#{datestr} to #{realdate.end}"
551 "date:(>= #{sprintf "%012d", realdate.end.to_i})"
553 Redwood::log "chronic: translated #{field}:#{datestr} to #{realdate.begin}"
554 "date:(<= #{sprintf "%012d", realdate.begin.to_i})"
556 Redwood::log "chronic: translated #{field}:#{datestr} to #{realdate}"
557 "date:(<= #{sprintf "%012d", realdate.end.to_i}) date:(>= #{sprintf "%012d", realdate.begin.to_i})"
560 BufferManager.flash "Can't understand date #{datestr.inspect}!"
561 chronic_failure = true
564 subs = nil if chronic_failure
567 ## limit:42 restrict the search to 42 results
568 subs = subs.gsub(/\blimit:(\S+)\b/) do
571 extraopts[:limit] = lim.to_i
574 BufferManager.flash "Can't understand limit #{lim.inspect}!"
580 [@qparser.parse(subs), extraopts]
587 query = Ferret::Search::BooleanQuery.new
588 query.add_query opts[:qobj], :must if opts[:qobj]
589 labels = ([opts[:label]] + (opts[:labels] || [])).compact
590 labels.each { |t| query.add_query Ferret::Search::TermQuery.new("label", t.to_s), :must }
591 if opts[:participants]
592 q2 = Ferret::Search::BooleanQuery.new
593 opts[:participants].each do |p|
594 q2.add_query Ferret::Search::TermQuery.new("from", p.email), :should
595 q2.add_query Ferret::Search::TermQuery.new("to", p.email), :should
597 query.add_query q2, :must
600 query.add_query Ferret::Search::TermQuery.new("label", "spam"), :must_not unless opts[:load_spam] || labels.include?(:spam)
601 query.add_query Ferret::Search::TermQuery.new("label", "deleted"), :must_not unless opts[:load_deleted] || labels.include?(:deleted)
602 query.add_query Ferret::Search::TermQuery.new("label", "killed"), :must_not if opts[:skip_killed]
606 def save_sources fn=Redwood::SOURCE_FN
607 @source_mutex.synchronize do
608 if @sources_dirty || @sources.any? { |id, s| s.dirty? }
612 FileUtils.mv fn, bakfn, :force => true unless File.exists?(bakfn) && File.size(fn) == 0
614 Redwood::save_yaml_obj sources.sort_by { |s| s.id.to_i }, fn, true
617 @sources_dirty = false