From dd1483cb6d9c060a17dc68357975de2b1ec09c08 Mon Sep 17 00:00:00 2001
From: Gus Power <gus@infinitesidequests.com>
Date: Wed, 14 May 2025 13:21:08 +0100
Subject: reduce size of DnsRecordType (introduce enum), add overall config w/
 supporting "full" test file.

---
 src/config.rs | 115 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/config.rs

(limited to 'src/config.rs')

diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..9230f38
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,115 @@
+use crate::dyndns_service::DynDnsProvider;
+use fqdn::FQDN;
+use serde::{Deserialize, Serialize};
+use serde_with::DisplayFromStr;
+use serde_with::serde_as;
+use strum::Display;
+
+#[derive(Debug, Deserialize, Serialize)]
+#[serde(transparent)]
+struct Config {
+    wans: Vec<WanConfig>
+}
+
+#[derive(Debug, Deserialize, Serialize)]
+struct WanConfig {
+    interface: Option<String>,
+    #[serde(flatten)]
+    dns_record: DnsRecord,
+    providers: Vec<DynDnsProvider>,
+}
+
+#[derive(Debug, Display, Deserialize, Serialize)]
+#[derive(PartialEq)]
+pub enum DnsRecordType {
+    A,
+    AAAA
+}
+
+#[serde_as]
+#[derive(Debug, Deserialize, Serialize)]
+struct DnsRecord {
+    #[serde_as(as = "DisplayFromStr")]
+    fqdn: FQDN,
+    #[serde(default = "default_ttl")]
+    ttl: u32,
+    #[serde(default = "default_record_type")]
+    record_type: DnsRecordType,
+}
+
+fn default_record_type() -> DnsRecordType {
+    DnsRecordType::A
+}
+fn default_ttl() -> u32 {
+    300
+}
+
+#[cfg(test)]
+mod tests {
+    use std::error::Error;
+    use std::fs::{read_dir, File};
+    use std::io::BufReader;
+    use super::*;
+    use serde_json::json;
+    use std::str::FromStr;
+    use crate::dyndns_service::DynDnsProvider::GANDI;
+    use crate::dyndns_service::gandi::Gandi;
+
+    #[test]
+    fn check_minimal_config() {
+        let input = json!({
+            "fqdn": "dyn.domain.com",
+            "providers": [ {
+                "type": "GANDI",
+                "api_key": "SOME-API-KEY",
+            } ]
+        });
+
+        let wan_config = serde_json::from_value::<WanConfig>(input).unwrap();
+
+        assert_eq!(
+            wan_config.dns_record.fqdn,
+            FQDN::from_str("dyn.domain.com").unwrap()
+        );
+        assert_eq!(wan_config.interface, None);
+
+        assert_eq!(wan_config.providers.len(), 1);
+        let expected = Gandi::new("SOME-API-KEY".to_string());
+        let actual = wan_config.providers.get(0).unwrap();
+        assert_eq!(&GANDI(expected), actual);
+    }
+
+    #[test]
+    fn check_defaults_on_dns_record_deserialization() {
+        let input = json!({
+            "fqdn": "dyn.mydomain.com",
+        });
+
+        let dns_record = serde_json::from_value::<DnsRecord>(input).unwrap();
+
+        assert_eq!(dns_record.record_type, default_record_type());
+        assert_eq!(dns_record.ttl, default_ttl());
+
+        assert_eq!(dns_record.fqdn, FQDN::from_str("dyn.mydomain.com").unwrap());
+    }
+
+    #[test]
+    fn check_file_configs() -> Result<(), Box<dyn Error>> {
+        let path = std::path::Path::new("test");
+        for entry in read_dir(path)? {
+            let entry = entry?;
+            let test_file_path = entry.path();
+            if test_file_path.extension().unwrap_or_default() != "json" {
+                continue;
+            }
+
+            let file = File::open(test_file_path)?;
+            let reader = BufReader::new(file);
+
+            let actual: Config = serde_json::from_reader(reader)?;
+            assert_eq!(actual.wans.len(), 2);
+        }
+        Ok(())
+    }
+
+}
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