1 files changed, 55 insertions, 0 deletions

diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..a1c4a66
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,55 @@
+use std::fs;
+use std::path::Path;
+
+use anyhow::anyhow;
+use serde_derive::Deserialize;
+use serde_derive::Serialize;
+
+#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub struct Root {
+    pub listen: String,
+    pub fields: Vec<Field>,
+    pub relations: Vec<Relation>,
+}
+
+#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub struct Field {
+    pub id: String,
+    #[serde(default = "distinct_default")]
+    pub distinct: bool,
+}
+
+fn distinct_default() -> bool {
+    false
+}
+
+#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub struct Relation {
+    pub name: String,
+    pub connect: String,
+    pub table_name: String,
+    pub fields: Vec<RelationField>,
+}
+
+#[derive(Default, Debug, Clone, PartialEq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub struct RelationField {
+    pub id: String,
+    pub query: String,
+}
+
+pub fn read_file<P: AsRef<Path>>(path: P) -> Result<Root, anyhow::Error> {
+    let s = match fs::read_to_string(path) {
+        Ok(s) => s,
+        Err(why) => {
+            return Err(anyhow!("failed to read toml file: {}", why));
+        }
+    };
+    match toml::from_str(&*s) {
+        Ok(r) => Ok(r),
+        Err(why) => Err(anyhow!("failed to decode toml file: {}", why)),
+    }
+}
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