7 files changed, 41 insertions, 7 deletions
diff --git a/pkg/config/config.go b/pkg/config/config.go
index f97467a..6e4bba5 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -9,13 +9,17 @@ import (
 )
 
 var validToken = regexp.MustCompile(`^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$`)
+var validTrainStop = regexp.MustCompile(`^[a-zA-Z0-9:_]+$`)
 
 type Config struct {
 	// Address is the hostname or ip the web server will listen to
 	Address string `yaml:"address",default:"127.0.0.1"`
-	Port    string `yaml:"port",default:"8080"`
+	// Port is the tcp port number or service name the web server will listen to
+	Port string `yaml:"port",default:"8080"`
 	// Token is the sncf api token
 	Token string `yaml:"token"`
+	// TrainStop is the navitia code of the train stop the webapp will monitor
+	TrainStop string `yaml:"trainStop"`
 }
 
 func (c *Config) validate() error {
@@ -33,6 +37,10 @@ func (c *Config) validate() error {
 	if ok := validToken.MatchString(c.Token); !ok {
 		return newInvalidTokenError(c.Token)
 	}
+	// TrainStop
+	if ok := validTrainStop.MatchString(c.TrainStop); !ok {
+		return newInvalidTrainStopError(c.TrainStop)
+	}
 	return nil
 }
 
diff --git a/pkg/config/config_test.go b/pkg/config/config_test.go
index 6969191..a4c170b 100644
--- a/pkg/config/config_test.go
+++ b/pkg/config/config_test.go
@@ -11,16 +11,18 @@ import (
 func TestLoadFile(t *testing.T) {
 	// Minimal yaml file
 	minimalConfig := Config{
-		Address: "127.0.0.2",
-		Port:    "8082",
-		Token:   "12345678-9abc-def0-1234-56789abcdef0",
+		Address:   "127.0.0.2",
+		Port:      "8082",
+		Token:     "12345678-9abc-def0-1234-56789abcdef0",
+		TrainStop: "ABCD:test:01",
 	}
 
 	// Minimal yaml file with hostname resolving
 	minimalConfigWithResolving := Config{
-		Address: "localhost",
-		Port:    "www",
-		Token:   "12345678-9abc-def0-1234-56789abcdef0",
+		Address:   "localhost",
+		Port:      "www",
+		Token:     "12345678-9abc-def0-1234-56789abcdef0",
+		TrainStop: "VWXY_Z:test:90",
 	}
 
 	// Test cases
@@ -36,6 +38,7 @@ func TestLoadFile(t *testing.T) {
 		{"Unresolvable address should fail to load", "test_data/invalid_address_unresolvable.yaml", nil, &InvalidAddressError{}},
 		{"Invalid port should fail to load", "test_data/invalid_port.yaml", nil, &InvalidPortError{}},
 		{"Invalid token should fail to load", "test_data/invalid_token.yaml", nil, &InvalidTokenError{}},
+		{"Invalid trainStop should fail to load", "test_data/invalid_trainStop.yaml", nil, &InvalidTrainStopError{}},
 		{"Minimal config", "test_data/minimal.yaml", &minimalConfig, nil},
 		{"Minimal config with resolving", "test_data/minimal_with_hostname.yaml", &minimalConfigWithResolving, nil},
 	}
diff --git a/pkg/config/error.go b/pkg/config/error.go
index c49b6a9..41a323c 100644
--- a/pkg/config/error.go
+++ b/pkg/config/error.go
@@ -90,3 +90,18 @@ func newInvalidTokenError(token string) error {
 		token: token,
 	}
 }
+
+// Invalid trainStop field error
+type InvalidTrainStopError struct {
+	trainStop string
+}
+
+func (e *InvalidTrainStopError) Error() string {
+	return fmt.Sprintf("Invalid trainStop %s : it must be a string that lookslike \"stop_area:SNCF:87723502\" (make sure to quote the string because of the colon characters)", e.trainStop)
+}
+
+func newInvalidTrainStopError(trainStop string) error {
+	return &InvalidTrainStopError{
+		trainStop: trainStop,
+	}
+}
diff --git a/pkg/config/error_test.go b/pkg/config/error_test.go
index f9807c1..4a80b05 100644
--- a/pkg/config/error_test.go
+++ b/pkg/config/error_test.go
@@ -17,4 +17,6 @@ func TestErrorsCoverage(t *testing.T) {
 	_ = invalidPortErr.Unwrap()
 	invalidTokenErr := InvalidTokenError{}
 	_ = invalidTokenErr.Error()
+	invalidTrainStopErr := InvalidTrainStopError{}
+	_ = invalidTrainStopErr.Error()
 }
diff --git a/pkg/config/test_data/invalid_trainStop.yaml b/pkg/config/test_data/invalid_trainStop.yaml
new file mode 100644
index 0000000..159950d
--- /dev/null
+++ b/pkg/config/test_data/invalid_trainStop.yaml
@@ -0,0 +1,4 @@
+address: 127.0.0.2
+port: 8082
+token: 12345678-9abc-def0-1234-56789abcdef0
+trainStop: =
diff --git a/pkg/config/test_data/minimal.yaml b/pkg/config/test_data/minimal.yaml
index 2944645..e34db15 100644
--- a/pkg/config/test_data/minimal.yaml
+++ b/pkg/config/test_data/minimal.yaml
@@ -1,3 +1,4 @@
 address: 127.0.0.2
 port: 8082
 token: 12345678-9abc-def0-1234-56789abcdef0
+trainStop: "ABCD:test:01"
diff --git a/pkg/config/test_data/minimal_with_hostname.yaml b/pkg/config/test_data/minimal_with_hostname.yaml
index dbede14..116688a 100644
--- a/pkg/config/test_data/minimal_with_hostname.yaml
+++ b/pkg/config/test_data/minimal_with_hostname.yaml
@@ -1,3 +1,4 @@
 address: localhost
 port: www
 token: 12345678-9abc-def0-1234-56789abcdef0
+trainStop: "VWXY_Z:test:90"