add !crate in rust.py

modules/rust.py

@@ -3,6 +3,9 @@
 import json, socket
 from src import ModuleManager, utils
 
+API_CRATE = "https://crates.io/api/v1/crates/%s"
+URL_CRATE = "https://crates.io/crates/%s"
+
 EVAL_URL = "https://play.rust-lang.org/execute"
 FN_TEMPLATE = """
 fn main() {
@@ -40,3 +43,20 @@ class Module(ModuleManager.BaseModule):
         err_or_out = "stdout" if page.data["success"] else "stderr"
         event[err_or_out].write("%s: %s" % (event["user"].nickname,
             page.data[err_or_out].strip("\n")))
+
+    @utils.hook("received.command.crate")
+    @utils.kwarg("min_args", 1)
+    @utils.kwarg("help", "Look up a given Rust crate on crates.io")
+    @utils.kwarg("usage", "<crate-name>")
+    def crate(self, event):
+        query = event["args_split"][0]
+        request = utils.http.Request(API_CRATE % query, json=True)
+        response = utils.http.request(request)
+        if response.code == 200:
+            crate = response.data["crate"]
+            name = crate["id"]
+            url = URL_CRATE % name
+            event["stdout"].write("%s %s: %s - %s" % (
+                name, crate["max_version"], crate["description"], url))
+        else:
+            event["stderr"].write("Crate '%s' not found" % query)