feat: add __rule, but cannot run

__rule/json-rules-engine/src/main.rs

@@ -0,0 +1,86 @@
+use json_rules_engine::{Engine, Rule, Map, from_dynamic};
+use serde_json::json;
+use serde::{Serialize, Deserialize};
+
+#[derive(Deserialize, Serialize)]
+struct Facts {
+    name: String,
+    age: u8,
+    action: String
+}
+
+fn age_greater_than20_less_than_inclusive25(p: Map) -> bool {
+    let facts: Facts = from_dynamic(&p.into()).unwrap();
+    facts.age > 20 && facts.age <= 25
+}
+
+#[tokio::main]
+pub async fn main() -> anyhow::Result<()> {
+    let sendgrid_api_key = "kjsldkjslkjlwkjkjew";
+
+    let rule_json = json!({
+        "conditions": {
+            "and": [
+                {
+                    "field": "name",
+                    "operator": "string_equals",
+                    "value": "Cheng JIANG"
+                },
+                {
+                    "field": "age",
+                    "operator": "int_in_range",
+                    "value": [20, 25] 
+                },
+                {
+                    "script": "facts.age > 20 && facts.age <= 25",
+                },
+                {
+                    "script": "my_function(facts)",
+                },
+                {
+                    "field": "action",
+                    "operator": "string_equals",
+                    "value": "coding in rust"
+                }
+            ]
+        },
+        "events": [
+            {
+                "type": "post_to_callback_url",
+                "params": {
+                    "callback_url": "http://example.com/people/conding_in_rust",
+                    "type": "info",
+                    "title": "Another person is coding in rust",
+                    "message": "Name: {{ name }}, Age: {{ age }}, Action: {{ action }},"
+                }
+            },
+            {
+                "type": "email_notification",
+                "params": {
+                    "from": "alex_cj96@foxmail.com",
+                    "to": ["abc.def@gmail.com"],
+                    "type": "info",
+                    "title": "Another person is coding in rust",
+                    "message": "Name: {{ name }}, Age: {{ age }}, Action: {{ action }},"
+                }
+            }
+        ]
+    });
+
+    let rule: Rule = serde_json::from_str::<Rule>(&serde_json::to_string(&rule_json).unwrap()).unwrap();
+
+    let mut engine = Engine::new(sendgrid_api_key.into());
+    engine.add_rule(rule);
+    engine.add_function("my_function", age_greater_than20_less_than_inclusive25);
+
+    let facts = json!({
+        "name": "Cheng JIANG",
+        "age": 24,
+        "action": "coding in rust",
+    });
+
+    let rule_results = engine.run(&facts).await?;
+
+    println!("{:?}", rule_results);
+    Ok(())
+}