server: improve part search

server.rb

@@ -142,14 +142,35 @@ end
 get '/search/:terms' do
   terms = params['terms'].split(" ")
   terms.keep_if {|term| term.length >= 3}
-  ids = Set.new
-  part_statement = @db.prepare("SELECT id FROM part WHERE name LIKE ?")
-  terms.each do |term| 
-    part_statement.execute("%#{term}%").each do |row|
-      ids << row["id"]
+  halt 404 if terms.empty?
+  # search in names, description, and category
+  statements = []
+  statements << @db.prepare("SELECT id FROM part WHERE name LIKE ?")
+  statements << @db.prepare("SELECT id FROM part WHERE description LIKE ?")
+  statements << @db.prepare("SELECT property_value.part AS id FROM property_value JOIN property ON property.id = property_value.property WHERE property.name = 'category' AND property_value.value LIKE ?")
+  term_ids = []
+  terms.each do |term|
+    ids = Set.new
+    # OR term location
+    statements.each do |statement|
+      statement.execute("%#{term}%").each do |row|
+        ids << row["id"]
+      end
+    end
+    term_ids << ids
+  end
+  # get all children
+  statement = @db.prepare("SELECT id FROM part WHERE family IN (?)")
+  term_ids.each do |term_id|
+    statement.execute(term_id.to_a * ",").each do |row|
+      term_id << row["id"]
     end
   end
-  puts ids
+  # AND terms
+  ids = term_ids.shift
+  term_ids.each do |term_id|
+    ids &= term_id
+  end
   parts = ids.collect {|id| get_part_by_id(id)}
   parts.compact!
   parts = parts[0, PARTS_LIMIT]