summaryrefslogtreecommitdiff
path: root/lib/chef/couchdb.rb
blob: 22a651ca4891588fcdaef0eebc989a119ae8405c (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
#
# Author:: Adam Jacob (<adam@hjksolutions.com>)
# Copyright:: Copyright (c) 2008 HJK Solutions, LLC
# 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 File.join(File.dirname(__FILE__), "mixin", "params_validate")
require 'digest/sha2'
require 'json'

class Chef
  class CouchDB
    include Chef::Mixin::ParamsValidate
    
    def initialize(url=nil)
      url ||= Chef::Config[:couchdb_url]
      @rest = Chef::REST.new(url)
    end
    
    def create_db
      @database_list = @rest.get_rest("_all_dbs")
      unless @database_list.detect { |db| db == Chef::Config[:couchdb_database] }
        response = @rest.put_rest(Chef::Config[:couchdb_database], Hash.new)
      end
      Chef::Config[:couchdb_database]
    end
    
    def create_design_document(name, data)
      to_update = true
      begin
        old_doc = @rest.get_rest("#{Chef::Config[:couchdb_database]}/_design%2F#{name}")
        if data["version"] != old_doc["version"]
          data["_rev"] = old_doc["_rev"]
          Chef::Log.debug("Updating #{name} views")
        else
          to_update = false
        end
      rescue
        Chef::Log.debug("Creating #{name} views for the first time")
      end
      if to_update
        @rest.put_rest("#{Chef::Config[:couchdb_database]}/_design%2F#{name}", data)
      end
      true
    end

    def store(obj_type, name, object)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
          :object => object,
        },
        {
          :object => { :respond_to => :to_json },
        }
      )
      @rest.put_rest("#{Chef::Config[:couchdb_database]}/#{obj_type}_#{safe_name(name)}", object)
    end

    def load(obj_type, name)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
      )
      @rest.get_rest("#{Chef::Config[:couchdb_database]}/#{obj_type}_#{safe_name(name)}")
    end
  
    def delete(obj_type, name, rev=nil)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
      )
      unless rev
        last_obj = @rest.get_rest("#{Chef::Config[:couchdb_database]}/#{obj_type}_#{safe_name(name)}")
        if last_obj.respond_to?(:couchdb_rev)
          rev = last_obj.couchdb_rev
        else
          rev = last_obj['_rev']
        end
      end
      @rest.delete_rest("#{Chef::Config[:couchdb_database]}/#{obj_type}_#{safe_name(name)}?rev=#{rev}")
    end
  
    def list(view, inflate=false)
      validate(
        { 
          :view => view,
        },
        {
          :view => { :kind_of => String }
        }
      )
      if inflate
        @rest.get_rest("#{Chef::Config[:couchdb_database]}/_view/#{view}/all")
      else
        @rest.get_rest("#{Chef::Config[:couchdb_database]}/_view/#{view}/all_id")
      end
    end
  
    def has_key?(obj_type, name)
      validate(
        {
          :obj_type => obj_type,
          :name => name,
        },
        {
          :obj_type => { :kind_of => String },
          :name => { :kind_of => String },
        }
      )
      begin
        @rest.get_rest("#{Chef::Config[:couchdb_database]}/#{obj_type}_#{safe_name(name)}")
        true
      rescue
        false
      end
    end
    
    private
      def safe_name(name)
        name.gsub(/\./, "_")
      end

  end
end