feat: add phase1 task planner flow

src/agent/planner.rs

@@ -0,0 +1,72 @@
+use serde_json::{json, Value};
+use thiserror::Error;
+
+use crate::pipe::Action;
+
+const BAIDU_URL: &str = "https://www.baidu.com";
+const BAIDU_DOMAIN: &str = "www.baidu.com";
+const BAIDU_INPUT_SELECTOR: &str = "#kw";
+const BAIDU_SEARCH_BUTTON_SELECTOR: &str = "#su";
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct PlannedStep {
+    pub action: Action,
+    pub params: Value,
+    pub expected_domain: String,
+    pub log_message: String,
+}
+
+#[derive(Debug, Clone, PartialEq)]
+pub struct TaskPlan {
+    pub summary: String,
+    pub steps: Vec<PlannedStep>,
+}
+
+#[derive(Debug, Error, Clone, PartialEq, Eq)]
+pub enum PlannerError {
+    #[error("unsupported instruction: {0}")]
+    UnsupportedInstruction(String),
+    #[error("missing search query in instruction")]
+    MissingQuery,
+}
+
+pub fn plan_instruction(instruction: &str) -> Result<TaskPlan, PlannerError> {
+    let trimmed = instruction.trim();
+    let query = trimmed
+        .strip_prefix("打开百度搜索")
+        .or_else(|| trimmed.strip_prefix("打开百度并搜索"))
+        .ok_or_else(|| PlannerError::UnsupportedInstruction(trimmed.to_string()))?
+        .trim();
+
+    if query.is_empty() {
+        return Err(PlannerError::MissingQuery);
+    }
+
+    Ok(TaskPlan {
+        summary: format!("已在百度搜索{query}"),
+        steps: vec![
+            PlannedStep {
+                action: Action::Navigate,
+                params: json!({ "url": BAIDU_URL }),
+                expected_domain: BAIDU_DOMAIN.to_string(),
+                log_message: "navigate https://www.baidu.com".to_string(),
+            },
+            PlannedStep {
+                action: Action::Type,
+                params: json!({
+                    "selector": BAIDU_INPUT_SELECTOR,
+                    "text": query,
+                    "clear_first": true
+                }),
+                expected_domain: BAIDU_DOMAIN.to_string(),
+                log_message: format!("type {query} into {BAIDU_INPUT_SELECTOR}"),
+            },
+            PlannedStep {
+                action: Action::Click,
+                params: json!({ "selector": BAIDU_SEARCH_BUTTON_SELECTOR }),
+                expected_domain: BAIDU_DOMAIN.to_string(),
+                log_message: format!("click {BAIDU_SEARCH_BUTTON_SELECTOR}"),
+            },
+        ],
+    })
+}