Moving the REST API functions into a module

This module is now used by the client and
server side, rather than having a Handler module
that's 90% server functionality but also used by
the client.

While we don't automatically get api choice from this,
it at least provides a pattern for how we'll handle API
development over time.

Signed-off-by: Luke Kanies <luke@madstop.com>

1 files changed, 60 insertions, 0 deletions

diff --git a/lib/puppet/network/http/api/v1.rb b/lib/puppet/network/http/api/v1.rb
new file mode 100644
index 000000000..2ee1a815f
--- /dev/null
+++ b/lib/puppet/network/http/api/v1.rb
@@ -0,0 +1,60 @@
+require 'puppet/network/http/api'
+
+module Puppet::Network::HTTP::API::V1
+    # How we map http methods and the indirection name in the URI
+    # to an indirection method.
+    METHOD_MAP = {
+        "GET" => {
+            :plural => :search,
+            :singular => :find
+        },
+        "PUT" => {
+            :singular => :save
+        },
+        "DELETE" => {
+            :singular => :destroy
+        }
+    }
+
+    def uri2indirection(http_method, uri, params)
+        environment, indirection, key = uri.split("/", 4)[1..-1] # the first field is always nil because of the leading slash
+
+        raise ArgumentError, "The environment must be purely alphanumeric, not '%s'" % environment unless environment =~ /^\w+$/
+        raise ArgumentError, "The indirection name must be purely alphanumeric, not '%s'" % indirection unless indirection =~ /^\w+$/
+
+        method = indirection_method(http_method, indirection)
+
+        params[:environment] = environment
+
+        raise ArgumentError, "No request key specified in %s" % uri if key == "" or key.nil?
+
+        key = URI.unescape(key)
+
+        Puppet::Indirector::Request.new(indirection, method, key, params)
+    end
+
+    def indirection2uri(request)
+        indirection = request.method == :search ? request.indirection_name.to_s + "s" : request.indirection_name.to_s
+        "/#{request.environment.to_s}/#{indirection}/#{request.escaped_key}#{request.query_string}"
+    end
+
+    def indirection_method(http_method, indirection)
+        unless METHOD_MAP[http_method]
+            raise ArgumentError, "No support for http method %s" % http_method
+        end
+
+        unless method = METHOD_MAP[http_method][plurality(indirection)]
+            raise ArgumentError, "No support for plural %s operations" % http_method
+        end
+
+        return method
+    end
+
+    def plurality(indirection)
+        result = (indirection == handler.to_s + "s") ? :plural : :singular
+
+        indirection.sub!(/s$/, '') if result
+
+        result
+    end
+end