summaryrefslogtreecommitdiff
path: root/lib/chef/search/query.rb
blob: 6469a18c4901d06f959741ea1f5231dbc14bbeac (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
#
# Author:: Adam Jacob (<adam@opscode.com>)
# Copyright:: Copyright (c) 2008 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'chef/config'
require 'chef/exceptions'
require 'chef/rest'

require 'uri'

class Chef
  class Search
    class Query

      attr_accessor :rest
      attr_reader :config

      def initialize(url=nil, config:Chef::Config)
        @config = config
        @url = url
      end

      def rest
        @rest ||= Chef::REST.new(@url || @config[:chef_server_url])
      end

      # Backwards compatability for cookbooks.
      # This can be removed in Chef > 12.
      def partial_search(type, query='*:*', *args, &block)
        Chef::Log.warn(<<-WARNDEP)
DEPRECATED: The 'partial_search' API is deprecated and will be removed in
future releases. Please use 'search' with a :filter_result argument to get
partial search data.
WARNDEP

        if !args.empty? && args.first.is_a?(Hash)
          # partial_search uses :keys instead of :filter_result for
          # result filtering.
          args_h = args.first.dup
          args_h[:filter_result] = args_h[:keys]
          args_h.delete(:keys)

          search(type, query, args_h, &block)
        else
          search(type, query, *args, &block)
        end
      end

      #
      # New search input, designed to be backwards compatible with the old method signature
      # 'type' and 'query' are the same as before, args now will accept either a Hash of
      # search arguments with symbols as the keys (ie :sort, :start, :rows) and a :filter_result
      # option.
      #
      # :filter_result should be in the format of another Hash with the structure of:
      # {
      #   :returned_name1 => ["path", "to", "variable"],
      #   :returned_name2 => ["shorter", "path"]
      # }
      # a real world example might be something like:
      # {
      #   :ip_address => ["ipaddress"],
      #   :ruby_version => ["languages", "ruby", "version"]
      # }
      #  this will bring back 2 variables 'ip_address' and 'ruby_version' with whatever value was found
      # an example of the returned json may be:
      # {"ip_address":"127.0.0.1", "ruby_version": "1.9.3"}
      #
      def search(type, query='*:*', *args, &block)
        validate_type(type)

        args_h = hashify_args(*args)
        response = call_rest_service(type, query: query, **args_h)

        if block
          response["rows"].each { |row| block.call(row) if row }
          unless (response["start"] + response["rows"].length) >= response["total"]
            args_h[:start] = response["start"] + response["rows"].length
            search(type, query, args_h, &block)
          end
          true
        else
          [ response["rows"], response["start"], response["total"] ]
        end
      end

      private
      def validate_type(t)
        unless t.kind_of?(String) || t.kind_of?(Symbol)
          msg = "Invalid search object type #{t.inspect} (#{t.class}), must be a String or Symbol." +
          "Usage: search(:node, QUERY[, OPTIONAL_ARGS])" +
          "        `knife search environment QUERY (options)`"
          raise Chef::Exceptions::InvalidSearchQuery, msg
        end
      end

      def hashify_args(*args)
        return Hash.new if args.empty?
        return args.first if args.first.is_a?(Hash)

        args_h = Hash.new
        args_h[:sort] = args[0] if args[0]
        args_h[:start] = args[1] if args[1]
        args_h[:rows] = args[2]
        args_h[:filter_result] = args[3]
        args_h
      end

      def escape(s)
        s && URI.escape(s.to_s)
      end

      def create_query_string(type, query, rows, start, sort)
        qstr = "search/#{type}?q=#{escape(query)}"
        qstr += "&sort=#{escape(sort)}" if sort
        qstr += "&start=#{escape(start)}" if start
        qstr += "&rows=#{escape(rows)}" if rows
        qstr
      end

      def call_rest_service(type, query:'*:*', rows:nil, start:0, sort:'X_CHEF_id_CHEF_X asc', filter_result:nil)
        query_string = create_query_string(type, query, rows, start, sort)

        if filter_result
          response = rest.post_rest(query_string, filter_result)
          # response returns rows in the format of
          # { "url" => url_to_node, "data" => filter_result_hash }
          response['rows'].map! { |row| row['data'] }
        else
          response = rest.get_rest(query_string)
        end

        response
      end

    end
  end
end