modules

modules/deep-dive/geocode.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+rational_regex='-?[[:digit:]]+(\.[[:digit:]]+)?'
+result_regex="$rational_regex,$rational_regex"
+
+keyFile=${XDG_DATA_HOME:-~/.local/share}/google-api/key
+
+if [[ ! -f "$keyFile" ]]; then
+    mkdir -p "$(basename "$keyFile")"
+    echo "No Google API key found in $keyFile" >&2
+    echo "For getting one, see https://developers.google.com/maps/documentation/geocoding/overview#before-you-begin" >&2
+    exit 1
+fi
+
+key=$(cat "$keyFile")
+
+tmp=$(mktemp -d)
+trap 'rm -rf "$tmp"' exit
+
+output=$tmp/output
+
+curlArgs=(
+    https://maps.googleapis.com/maps/api/geocode/json
+    --silent --show-error --get --output "$output" --write-out '%{http_code}'
+    --data-urlencode address="$1"
+)
+
+#echo curl ''${curlArgs[@]@Q} >&2
+
+curlArgs+=(--data-urlencode key="$key")
+
+if status=$(curl "${curlArgs[@]}"); then
+    if [[ "$status" == 200 ]]; then
+        result=$(jq -r '.results[0].geometry.location as $loc | "\($loc | .lat),\($loc | .lng)"' "$output")
+        if ! [[ $result =~ $result_regex ]]; then
+            echo "Got a bad result of: '$result'" >&2
+            exit 1
+        else
+            echo "$result"
+        fi
+    else
+        echo "API returned non-200 HTTP status code $status, output is" >&2
+        cat "$output" >&2
+        exit 1
+    fi
+else
+    echo "curl exited with code $?" >&2
+    exit 1
+fi