From b71faa6e95a0736f1ff171e006b171467b65db90 Mon Sep 17 00:00:00 2001
From: Murilo Ijanc <murilo@ijanc.org>
Date: Sun, 26 Jul 2026 12:28:10 -0300
Subject: Initial import

---
 examples/cepis_lookup.cpp | 83 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 examples/cepis_lookup.cpp

(limited to 'examples')

diff --git a/examples/cepis_lookup.cpp b/examples/cepis_lookup.cpp
new file mode 100644
index 0000000..03a22b0
--- /dev/null
+++ b/examples/cepis_lookup.cpp
@@ -0,0 +1,83 @@
+/// Minimal CLI: `cepis-lookup 01001000`.
+///
+/// It exists for one concrete case — quickly confirming a local instance
+/// answers before pointing code at it:
+///
+/// ```sh
+/// cepis-lookup --base-url http://localhost:8080 01001000
+/// ```
+///
+/// A single CEP goes through the unit lookup, which carries `geo`; several go
+/// through the batch, which is one request instead of N and has no `geo`.
+///
+/// It is not the library's main interface; for that, include `<cepis/cepis.hpp>`.
+
+#include <chrono>
+#include <iostream>
+#include <optional>
+#include <string>
+#include <string_view>
+#include <vector>
+
+#include "cepis/cepis.hpp"
+
+namespace {
+
+cepis::Json to_json(const cepis::Address& address) {
+  cepis::Json object = address.raw;
+  if (!object.is_object()) {
+    object = cepis::Json::object();
+  }
+  return object;
+}
+
+void usage() {
+  std::cerr << "usage: cepis-lookup [--base-url URL] [--timeout SECONDS] CEP [CEP...]\n";
+}
+
+}  // namespace
+
+int main(int argc, char** argv) {
+  cepis::Config config;
+  std::vector<std::string> ceps;
+
+  for (int i = 1; i < argc; ++i) {
+    const std::string_view argument = argv[i];
+    if (argument == "--base-url" && i + 1 < argc) {
+      config.base_url = argv[++i];
+    } else if (argument == "--timeout" && i + 1 < argc) {
+      config.timeout =
+          std::chrono::milliseconds(static_cast<long long>(std::stod(argv[++i]) * 1000));
+    } else if (argument == "-h" || argument == "--help") {
+      usage();
+      return 0;
+    } else if (!argument.empty() && argument.front() == '-') {
+      usage();
+      return 2;
+    } else {
+      ceps.emplace_back(argument);
+    }
+  }
+
+  if (ceps.empty()) {
+    usage();
+    return 2;
+  }
+
+  try {
+    const cepis::Client client(config);
+    if (ceps.size() == 1) {
+      std::cout << to_json(client.lookup(ceps.front())).dump() << '\n';
+      return 0;
+    }
+    cepis::Json output = cepis::Json::array();
+    for (const std::optional<cepis::Address>& address : client.lookup_many(ceps)) {
+      output.push_back(address ? to_json(*address) : cepis::Json{});
+    }
+    std::cout << output.dump() << '\n';
+    return 0;
+  } catch (const cepis::Error& error) {
+    std::cerr << "error: " << error.what() << '\n';
+    return 1;
+  }
+}
-- 
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