feat(CLI):required arg parsing + first doit() call

We are parsing required scalar values and handle parse-errors correctly,
to the point were we make a simple, non-upload doit() call.

It shows that we seem to build invalid calls, for now,but that's nothing
we can't fix once the time is ripe.

Next goals will be related to finalizing the argument parsing code.

Fixes #60

etc/api/shared.yaml

@@ -3,6 +3,11 @@ api:
     # exclude APIs which currently don't build correctly. State the reason for the exclusion as well
     # to allow looking at it at a later point.
     - 
+  terms:
+    # how to actually do something with the API
+    action: doit
+    # when a resource is supposed to be uploaded
+    upload_action: upload
 # Contains values shared among all API implementations
 directories:
   # directory under which all generated sources should reside

etc/api/type-api.yaml

@@ -1,10 +1,5 @@
 api:
   base_path: "etc/api"
-  terms:
-    # how to actually do something with the API
-    action: doit
-    # when a resource is supposed to be uploaded
-    upload_action: upload
   properties:
     # additional fields specified by the user
     params: '_additional_params'

etc/api/type-cli.yaml

@@ -26,6 +26,6 @@ cargo:
   keywords: [cli]
   is_executable: YES
   dependencies:
-    - docopt = "*"
-    - docopt_macros = "*"
+    - docopt = "= 0.6.59"
+    - docopt_macros = "= 0.6.59"
     - rustc-serialize = "*"

src/mako/cli/lib/cli.py

@@ -81,6 +81,10 @@ def ident(name):
 def cmd_ident(name):
     return 'cmd_' + ident(name)
 
+# Similar to cmd_ident, but for arguments
+def arg_ident(name):
+    return 'arg_' + ident(name)
+
 # Returns identifier for method dealing with options for the given resource-method pair
 def call_method_ident(resource, method):
     return '_%s_%s' % (ident(resource), ident(method))

src/mako/cli/lib/engine.mako

@@ -1,9 +1,9 @@
 <%namespace name="util" file="../../lib/util.mako"/>\
 <%!
-    from util import hub_type
+    from util import (hub_type, mangle_ident, indent_all_but_first_by, activity_rust_type)
     from cli import (mangle_subcommand, new_method_context, PARAM_FLAG, STRUCT_FLAG, UPLOAD_FLAG, OUTPUT_FLAG, VALUE_ARG,
                      CONFIG_DIR, SCOPE_FLAG, is_request_value_property, FIELD_SEP, docopt_mode, FILE_ARG, MIME_ARG, OUT_ARG, 
-                     cmd_ident, call_method_ident)
+                     cmd_ident, call_method_ident, arg_ident, POD_TYPES)
 
     v_arg = '<%s>' % VALUE_ARG
 %>\
@@ -12,29 +12,31 @@
     hub_type_name = 'api::' + hub_type(c.schemas, util.canonical_name())
 %>\
 mod cmn;
-use cmn::{InvalidOptionsError, JsonTokenStorage};
+use cmn::{InvalidOptionsError, CLIError, JsonTokenStorage};
+use std::default::Default;
+use std::str::FromStr;
 
 use oauth2::{Authenticator, DefaultAuthenticatorDelegate};
 
 struct Engine {
     opt: Options,
-    config_dir: String,
     hub: ${hub_type_name}<hyper::Client, Authenticator<DefaultAuthenticatorDelegate, JsonTokenStorage, hyper::Client>>,
 }
 
 
 impl Engine {
 % for resource in sorted(c.rta_map.keys()):
     % for method in sorted(c.rta_map[resource]):
-    fn ${call_method_ident(resource, method)}(&self, dry_run: bool, err: &mut InvalidOptionsError) -> Option<api::Error> {
-        ${self._method_call_impl(c, resource, method)}\
+    fn ${call_method_ident(resource, method)}(&self, dry_run: bool, err: &mut InvalidOptionsError)
+                                                    -> Option<api::Error> {
+        ${self._method_call_impl(c, resource, method) | indent_all_but_first_by(2)}
     }
 
     % endfor # each method
 % endfor 
     fn _doit(&self, dry_run: bool) -> (Option<api::Error>, Option<InvalidOptionsError>) {
         let mut err = InvalidOptionsError::new();
-        let mut call_result: Option<api::Error> = None;
+        let mut call_result: Option<api::Error>;
         let mut err_opt: Option<InvalidOptionsError> = None;
 
 ## RESOURCE LOOP: check for set primary subcommand
@@ -95,7 +97,6 @@ self.opt.${cmd_ident(method)} {
                                       }, None);
         let engine = Engine {
             opt: opt,
-            config_dir: config_dir,
             hub: ${hub_type_name}::new(hyper::Client::new(), auth),
         };
 
@@ -113,6 +114,67 @@ self.opt.${cmd_ident(method)} {
 }
 </%def>
 
-<%def name="_method_call_impl(c, resource, method)">\
-None
+<%def name="_method_call_impl(c, resource, method)" buffered="True">\
+<%
+    mc = new_method_context(resource, method, c)
+    ## if is_request_value_property(mc, p):
+    ##         continue
+    ##     args.append('<%s>' % mangle_subcommand(p.name))
+%>\
+    ## REQUIRED PARAMETERS
+% for p in mc.required_props:
+<% 
+    prop_name = mangle_ident(p.name)
+    prop_type = activity_rust_type(c.schemas, p, allow_optionals=False)
+    opt_ident = 'self.opt.' + arg_ident(p.name)
+%>\
+    % if is_request_value_property(mc, p):
+let ${prop_name}: api::${prop_type} = Default::default();
+    % else:
+let ${prop_name}: ${prop_type} = \
+        % if p.type == 'string':
+${opt_ident}.clone();
+        % else:
+
+    match FromStr::from_str(&${opt_ident}) {
+        Err(perr) => {
+            err.issues.push(CLIError::ParseError(format!("Failed to parse argument <${mangle_subcommand(p.name)}> as ${p.type} with error: {}", perr)));
+            Default::default()
+        },
+        Ok(v) => v,
+    };
+        % endif # handle argument type
+    % endif # handle request value
+% endfor # each required parameter
+<%
+    call_args = list()
+    for p in mc.required_props:
+        borrow = ''
+        # if type is not available, we know it's the request value, which should also be borrowed
+        ptype = p.get('type', 'string')
+        if ptype not in POD_TYPES or ptype == 'string':
+            borrow = '&'
+        call_args.append(borrow + mangle_ident(p.name))
+    # end for each required prop
+%>\
+let call = self.hub.${mangle_ident(resource)}().${mangle_ident(method)}(${', '.join(call_args)});
+## TODO: set parameters
+## TODO: parse upload and output information
+if dry_run {
+    None
+} else {
+    ## Make the call, handle uploads, handle downloads (also media downloads|json decoding)
+    ## TODO: unify error handling
+    % if mc.media_params:
+    return None
+    % else:
+    match call.${api.terms.action}() {
+        Err(api_err) => Some(api_err),
+        Ok(res) => {
+            println!("DEBUG: {:?}", res);
+            None
+        }
+    }
+    % endif
+}\
 </%def>

src/mako/cli/main.rs.mako

@@ -12,6 +12,7 @@
 </%block>
 #![feature(plugin, exit_status)]
 #![plugin(docopt_macros)]
+#![allow(unused_variables, unused_imports, dead_code)]
 
 extern crate docopt;
 extern crate yup_oauth2 as oauth2;

src/rust/cli/cmn.rs

@@ -95,12 +95,14 @@ impl fmt::Display for ConfigurationError {
 #[derive(Debug)]
 pub enum CLIError {
     Configuration(ConfigurationError),
+    ParseError(String),
 }
 
 impl fmt::Display for CLIError {
     fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> {
         match *self {
-            CLIError::Configuration(ref err) => writeln!(f, "Configuration -> {}", err)
+            CLIError::Configuration(ref err) => writeln!(f, "Configuration -> {}", err),
+            CLIError::ParseError(ref desc) => desc.fmt(f),
         }
     }
 }