Implement a SchemaConfig::applies_to helper

src/extension/schemaconfig/CMakeLists.txt

@@ -1,5 +1,5 @@
 sourcemeta_library(NAMESPACE sourcemeta PROJECT core NAME schemaconfig
-  PRIVATE_HEADERS error.h SOURCES parse.cc find.cc)
+  PRIVATE_HEADERS error.h SOURCES parse.cc schemaconfig.cc)
 
 if(SOURCEMETA_CORE_INSTALL)
   sourcemeta_library_install(NAMESPACE sourcemeta PROJECT core NAME schemaconfig)

src/extension/schemaconfig/include/sourcemeta/core/schemaconfig.h

@@ -49,6 +49,11 @@ struct SOURCEMETA_CORE_SCHEMACONFIG_EXPORT SchemaConfig {
   std::unordered_map<JSON::String, JSON::String> resolve;
   JSON extra = JSON::make_object();
 
+  /// Check if the given path represents a schema described by this
+  /// configuration
+  [[nodiscard]]
+  auto applies_to(const std::filesystem::path &path) const -> bool;
+
   /// Parse a configuration file from its contents
   [[nodiscard]]
   static auto from_json(const JSON &value,

src/extension/schemaconfig/find.cc → src/extension/schemaconfig/schemaconfig.cc

@@ -1,7 +1,9 @@
 #include <sourcemeta/core/io.h>
 #include <sourcemeta/core/schemaconfig.h>
 
-#include <cassert> // assert
+#include <algorithm> // std::ranges::any_of
+#include <cassert>   // assert
+#include <string>    // std::string
 
 namespace sourcemeta::core {
 
@@ -31,4 +33,11 @@ auto SchemaConfig::find(const std::filesystem::path &path)
   return std::nullopt;
 }
 
+auto SchemaConfig::applies_to(const std::filesystem::path &path) const -> bool {
+  const std::string filename{path.filename().string()};
+  return std::ranges::any_of(this->extension, [&filename](const auto &suffix) {
+    return filename.ends_with(suffix);
+  });
+}
+
 } // namespace sourcemeta::core

test/schemaconfig/CMakeLists.txt

@@ -1,5 +1,6 @@
 sourcemeta_googletest(NAMESPACE sourcemeta PROJECT core NAME schemaconfig
   SOURCES
+    schemaconfig_applies_to_test.cc
     schemaconfig_find_test.cc
     schemaconfig_from_json_test.cc
     schemaconfig_read_json_test.cc)

test/schemaconfig/schemaconfig_applies_to_test.cc

@@ -0,0 +1,102 @@
+#include <gtest/gtest.h>
+
+#include <sourcemeta/core/json.h>
+#include <sourcemeta/core/schemaconfig.h>
+
+TEST(SchemaConfig_applies_to, default_extensions) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com"
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_TRUE(config.applies_to("foo.json"));
+  EXPECT_TRUE(config.applies_to("bar.yaml"));
+  EXPECT_TRUE(config.applies_to("baz.yml"));
+  EXPECT_FALSE(config.applies_to("qux.schema"));
+  EXPECT_FALSE(config.applies_to("no_extension"));
+}
+
+TEST(SchemaConfig_applies_to, single_extension_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": ".json"
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_TRUE(config.applies_to("foo.json"));
+  EXPECT_TRUE(config.applies_to("/path/to/schema.json"));
+}
+
+TEST(SchemaConfig_applies_to, single_extension_no_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": ".json"
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_FALSE(config.applies_to("foo.yaml"));
+  EXPECT_FALSE(config.applies_to("foo.schema"));
+  EXPECT_FALSE(config.applies_to("no_extension"));
+}
+
+TEST(SchemaConfig_applies_to, multiple_extensions_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": [ ".json", ".yaml", ".yml" ]
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_TRUE(config.applies_to("foo.json"));
+  EXPECT_TRUE(config.applies_to("bar.yaml"));
+  EXPECT_TRUE(config.applies_to("baz.yml"));
+}
+
+TEST(SchemaConfig_applies_to, multiple_extensions_no_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": [ ".json", ".yaml" ]
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_FALSE(config.applies_to("foo.schema"));
+  EXPECT_FALSE(config.applies_to("bar.txt"));
+  EXPECT_FALSE(config.applies_to("no_extension"));
+}
+
+TEST(SchemaConfig_applies_to, double_extension_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": ".json"
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_TRUE(config.applies_to("foo.schema.json"));
+  EXPECT_TRUE(config.applies_to("/path/to/bar.test.json"));
+}
+
+TEST(SchemaConfig_applies_to, compound_extension_match) {
+  const auto input{sourcemeta::core::parse_json(R"JSON({
+    "baseUri": "https://example.com",
+    "extension": ".schema.json"
+  })JSON")};
+
+  const auto config{
+      sourcemeta::core::SchemaConfig::from_json(input, TEST_DIRECTORY)};
+
+  EXPECT_TRUE(config.applies_to("foo.schema.json"));
+  EXPECT_TRUE(config.applies_to("/path/to/bar.schema.json"));
+  EXPECT_FALSE(config.applies_to("baz.json"));
+  EXPECT_FALSE(config.applies_to("qux.schema.yaml"));
+}