Initial importv0.1.0

1 files changed, 93 insertions, 0 deletions

diff --git a/bin/cepis.dart b/bin/cepis.dart
new file mode 100644
index 0000000..8eec681
--- /dev/null
+++ b/bin/cepis.dart
@@ -0,0 +1,93 @@
+/// Command-line entry point: resolve CEPs from a terminal.
+///
+/// ```sh
+/// dart run cepis 01001000
+/// dart run cepis --base-url http://localhost:8080 01001000 20040020
+/// ```
+library;
+
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:cepis/cepis.dart';
+
+const String _usage = '''
+usage: cepis [--base-url URL] [--health] [CEP...]
+
+  --base-url URL  where the API lives (default $defaultBaseUrl)
+  --health        report the API's health instead of looking anything up
+  -h, --help      show this message
+
+One CEP prints the full record, coordinate included. Several go through the
+batch endpoint, which carries no coordinate.''';
+
+Future<int> run(List<String> arguments) async {
+  var baseUrl = defaultBaseUrl;
+  var wantHealth = false;
+  final ceps = <String>[];
+
+  for (var i = 0; i < arguments.length; i++) {
+    final argument = arguments[i];
+    if (argument == '-h' || argument == '--help') {
+      stdout.writeln(_usage);
+      return 0;
+    } else if (argument == '--health') {
+      wantHealth = true;
+    } else if (argument == '--base-url') {
+      if (i + 1 >= arguments.length) {
+        stderr.writeln('cepis: --base-url needs a value');
+        return 2;
+      }
+      baseUrl = arguments[++i];
+    } else if (argument.startsWith('-')) {
+      stderr.writeln('cepis: unknown option $argument');
+      return 2;
+    } else {
+      ceps.add(argument);
+    }
+  }
+
+  if (!wantHealth && ceps.isEmpty) {
+    stderr.writeln(_usage);
+    return 2;
+  }
+
+  final client = Client(baseUrl: baseUrl);
+  try {
+    if (wantHealth) {
+      final report = await client.health();
+      stdout.writeln(_encode(report.raw));
+      return report.ok ? 0 : 1;
+    }
+
+    if (ceps.length == 1) {
+      final address = await client.lookup(ceps.single);
+      stdout.writeln(_encode(address.raw));
+      return 0;
+    }
+
+    final result = await client.lookupMany(ceps);
+    for (var i = 0; i < ceps.length; i++) {
+      final address = result[i];
+      stdout.writeln(
+        address == null
+            ? '${ceps[i]}\tnot found'
+            : '${ceps[i]}\t${address.logradouro}\t${address.localidade}\t'
+                '${address.uf}',
+      );
+    }
+    return 0;
+  } on CepisException catch (error) {
+    stderr.writeln('cepis: ${error.message}');
+    return 1;
+  } finally {
+    client.close();
+  }
+}
+
+String _encode(Map<String, dynamic> data) =>
+    const JsonEncoder.withIndent('  ').convert(data);
+
+Future<void> main(List<String> arguments) async {
+  exitCode = await run(arguments);
+}