1 files changed, 78 insertions, 0 deletions
diff --git a/internal/mappings/parse.go b/internal/mappings/parse.go
new file mode 100644
index 0000000..64de5bb
--- /dev/null
+++ b/internal/mappings/parse.go
@@ -0,0 +1,78 @@
+// Copyright 2018 ThousandEyes Inc.
+//
+// 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.
+
+package mappings
+
+import (
+	"io/ioutil"
+	"os"
+
+	"gopkg.in/yaml.v2"
+
+	"github.com/thousandeyes/shoelaces/internal/log"
+)
+
+// Mappings struct contains YamlNetworkMaps and YamlHostnameMaps.
+type Mappings struct {
+	NetworkMaps  []YamlNetworkMap  `yaml:"networkMaps"`
+	HostnameMaps []YamlHostnameMap `yaml:"hostnameMaps"`
+}
+
+// YamlNetworkMap struct contains an association between a CIDR network and a
+// Script. It's different than mapping.NetworkMap in the sense that this
+// struct can be used to parse the JSON mapping file.
+type YamlNetworkMap struct {
+	Network string
+	Script  YamlScript
+}
+
+// YamlHostnameMap struct contains an association between a hostname regular
+// expression and a Script. It's different than mapping.HostnameMap in the
+// sense that this struct can be used to parse the JSON mapping file.
+type YamlHostnameMap struct {
+	Hostname string
+	Script   YamlScript
+}
+
+// YamlScript holds information regarding a script. Its name, its environment
+// and its parameters.
+type YamlScript struct {
+	Name        string
+	Environment string
+	Params      map[string]string
+}
+
+// ParseYamlMappings parses the mappings yaml file into a Mappings struct.
+func ParseYamlMappings(logger log.Logger, mappingsFile string) *Mappings {
+	var mappings Mappings
+
+	logger.Info("component", "config", "msg", "Reading mappings", "source", mappingsFile)
+	yamlFile, err := ioutil.ReadFile(mappingsFile)
+
+	if err != nil {
+		logger.Error(err)
+		os.Exit(1)
+	}
+
+	mappings.NetworkMaps = make([]YamlNetworkMap, 0)
+	mappings.HostnameMaps = make([]YamlHostnameMap, 0)
+
+	err = yaml.Unmarshal(yamlFile, &mappings)
+	if err != nil {
+		logger.Error(err)
+		os.Exit(1)
+	}
+
+	return &mappings
+}