OAuth part

The minimum to pass all authentications and arrive at the embedded app
index. This library is to be used with shopify-app-template-c for now,
as it assumes the existence of shopify.app.toml in the parent directory,
and index.html in the frontend directory.

1 files changed, 17 insertions, 0 deletions

diff --git a/regex.h b/regex.h
new file mode 100644
index 0000000..ebd51ac
--- /dev/null
+++ b/regex.h
@@ -0,0 +1,17 @@
+#define PCRE2_CODE_UNIT_WIDTH 8
+#include <pcre2.h>
+
+static inline bool regex_match(const char *shop)
+{
+	pcre2_code *re = pcre2_compile((PCRE2_SPTR)
+			"^[a-zA-Z0-9][a-zA-Z0-9\\-]*\\.myshopify\\.com",
+			PCRE2_ZERO_TERMINATED, 0, &(int){ 0 },
+			&(PCRE2_SIZE){ 0 }, NULL);
+	pcre2_match_data *match_data
+		= pcre2_match_data_create_from_pattern(re, NULL);
+	int rc = pcre2_match(re, (PCRE2_SPTR)shop, strlen(shop), 0, 0,
+			match_data, NULL);
+	pcre2_match_data_free(match_data);
+	pcre2_code_free(re);
+	return rc >= 0;
+}