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use assay_core::policy_engine::{evaluate_tool_args, VerdictStatus};
use crate::{CheckInput, Outcome};
pub fn args_valid(params: &serde_json::Value, input: &CheckInput) -> (Outcome, String) {
let schema = match params.get("schema") {
Some(s) => s,
None => return (Outcome::Error, "Config error: schema missing".into()),
};
// Wrap simple schema in tool map for policy_engine
let tool_name = input.tool_name.as_deref().unwrap_or("unknown");
let policy = serde_json::json!({
tool_name: schema
});
let args = match &input.args {
Some(a) => a,
None => return (Outcome::Error, "No args provided".into()),
};
let verdict = evaluate_tool_args(&policy, tool_name, args);
match verdict.status {
VerdictStatus::Allowed => (Outcome::Pass, "args valid".into()),
VerdictStatus::Blocked => {
// Map reason codes to test expectations if needed
if verdict.reason_code == "E_ARG_SCHEMA" {
// Extract first violation for parity valid reason check
// The test expects "percent 50 exceeds maximum 30" etc.
// The real engine returns structured JSON violations.
// We need to adapt the message to match the mock test cases OR update test cases.
// For V1 integration, ensuring Outcome matches is priority #1.
// The mock test strings are very specific "percent {} exceeds maximum {}".
// Real engine says: "data.percent: 50.0 is greater than the maximum of 30.0" (JSON schema output)
// To pass the STRICT parity test provided by the user (which checks `reason == reason`),
// we just need consistent strings.
// Since *both* Batch and Streaming call *this* wrapper, they will get identical strings.
// So we can return a generic string or the detailed one.
// Let's return the structured details stringified
(
Outcome::Fail,
format!("Schema violation: {}", verdict.details),
)
} else if verdict.reason_code == "E_POLICY_MISSING_TOOL" {
(Outcome::Error, "Tool not in policy".into())
} else {
(Outcome::Fail, format!("Blocked: {}", verdict.reason_code))
}
}
}
}
pub fn sequence_valid(params: &serde_json::Value, input: &CheckInput) -> (Outcome, String) {
let trace = match &input.trace {
Some(t) => t,
None => return (Outcome::Error, "No trace provided".into()),
};
let tool_names: Vec<&str> = trace.iter().map(|t| t.tool_name.as_str()).collect();
if let Some(rules) = params.get("rules").and_then(|r| r.as_array()) {
for rule in rules {
if let Some(rule_type) = rule.get("type").and_then(|t| t.as_str()) {
match rule_type {
"require" => {
if let Some(tool) = rule.get("tool").and_then(|t| t.as_str()) {
if !tool_names.contains(&tool) {
return (
Outcome::Fail,
format!("required tool not called: {}", tool),
);
}
}
}
"before" => {
let first = rule.get("first").and_then(|t| t.as_str());
let then = rule.get("then").and_then(|t| t.as_str());
if let (Some(first), Some(then)) = (first, then) {
let first_idx = tool_names.iter().position(|&t| t == first);
let then_idx = tool_names.iter().position(|&t| t == then);
match (first_idx, then_idx) {
(Some(f), Some(t)) if f >= t => {
return (
Outcome::Fail,
format!("{} must come before {}", first, then),
);
}
(None, Some(_)) => {
return (
Outcome::Fail,
format!("{} must come before {}", first, then),
);
}
_ => {}
}
}
}
_ => {}
}
}
}
}
(Outcome::Pass, "sequence valid".into())
}
pub fn blocklist(params: &serde_json::Value, input: &CheckInput) -> (Outcome, String) {
let tool = match &input.tool_name {
Some(t) => t,
None => return (Outcome::Error, "No tool_name provided".into()),
};
if let Some(blocked) = params.get("blocked").and_then(|b| b.as_array()) {
for b in blocked {
if let Some(blocked_name) = b.as_str() {
if tool == blocked_name {
return (Outcome::Fail, format!("tool {} is blocked", tool));
}
}
}
}
(Outcome::Pass, "tool allowed".into())
}