Use OSM as the single source of mountain passes

Replace the centcols CSV download/enrichment pipeline with OSM PBF
extraction as the primary (only) source: merge osmpass into mountain_pass,
drop the centcols table and model fields, filter to named passes with
elevation, and remove the centcols CLI flags.

1 files changed, 49 insertions, 0 deletions

diff --git a/mountain_pass/extract_test.go b/mountain_pass/extract_test.go
new file mode 100644
index 0000000..636372c
--- /dev/null
+++ b/mountain_pass/extract_test.go
@@ -0,0 +1,49 @@
+package mountain_pass
+
+import (
+	"testing"
+
+	"github.com/paulmach/osm"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestIsMountainPass(t *testing.T) {
+	cases := []struct {
+		name string
+		tags map[string]string
+		want bool
+	}{
+		{"tagged", map[string]string{"mountain_pass": "yes", "name": "Col de la Gineste"}, true},
+		{"legacy natural", map[string]string{"natural": "mountain_pass"}, true},
+		{"not a pass", map[string]string{"natural": "saddle", "name": "Col de la Gineste"}, false},
+		{"no tags", map[string]string{}, false},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			node := &osm.Node{Tags: osm.Tags{}}
+			for key, value := range c.tags {
+				node.Tags = append(node.Tags, osm.Tag{Key: key, Value: value})
+			}
+			assert.Equal(t, c.want, isMountainPass(node))
+		})
+	}
+}
+
+func TestParseElevation(t *testing.T) {
+	cases := []struct {
+		input string
+		want  int
+		ok    bool
+	}{
+		{"1320", 1320, true},
+		{"1320 m", 1320, true},
+		{" 447.5", 447, true},
+		{"", 0, false},
+		{"unknown", 0, false},
+	}
+	for _, c := range cases {
+		value, ok := parseElevation(c.input)
+		assert.Equal(t, c.want, value)
+		assert.Equal(t, c.ok, ok)
+	}
+}