refactor(engine): request-value parsing;Default

* Default::default() optimized to use T::default() if possible
* deduplicated special type handling ('Count' strings -> int64)
* put request value parsing into own private function

Fixes #69
[skip ci]
This commit is contained in:
Sebastian Thiel
2015-04-21 10:54:46 +02:00
parent 52c8225b8f
commit f7740ad149
2 changed files with 116 additions and 112 deletions

View File

@@ -108,13 +108,18 @@ def call_method_ident(resource, method):
def subcommand_md_filename(resource, method):
return mangle_subcommand(resource) + '_' + mangle_subcommand(method) + '.md'
def docopt_mode(protocols):
mode = '|'.join(protocols)
if len(protocols) > 1:
mode = '(%s)' % mode
return mode
# Returns a possibly remapped type, based on its name.
# Useful to map strings to more suitable types, i.e. counts
def actual_json_type(name, type):
if type == 'string' and 'Count' in name:
return 'int64'
return type
# Return schema' with fields dict: { 'field1' : SchemaField(...), 'SubSchema': schema' }
def to_cli_schema(c, schema):

View File

@@ -5,7 +5,7 @@
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, arg_ident, POD_TYPES, flag_ident, ident, JSON_TYPE_VALUE_MAP,
KEY_VALUE_ARG, to_cli_schema, SchemaEntry, CTYPE_POD)
KEY_VALUE_ARG, to_cli_schema, SchemaEntry, CTYPE_POD, actual_json_type)
v_arg = '<%s>' % VALUE_ARG
SOPT = 'self.opt.'
@@ -160,7 +160,7 @@ self.opt.${cmd_ident(method)} {
%>\
% if is_request_value_property(mc, p):
<% request_prop_type = prop_type %>\
let mut ${prop_name}: api::${prop_type} = Default::default();
let mut ${prop_name} = api::${prop_type}::default();
% elif p.type != 'string':
let ${prop_name}: ${prop_type} = arg_from_str(&${opt_ident}, err, "<${mangle_subcommand(p.name)}>", "${p.type}");
% endif # handle request value
@@ -187,9 +187,7 @@ for parg in ${SOPT + arg_ident(VALUE_ARG)}.iter() {
match key {
% for p in optional_props:
<%
ptype = p.type
if p.type == 'string' and 'Count' in p.name:
ptype = 'int64'
ptype = actual_json_type(p.name, p.type)
value_unwrap = 'value.unwrap_or("%s")' % JSON_TYPE_VALUE_MAP[ptype]
%>\
"${mangle_subcommand(p.name)}" => {
@@ -240,112 +238,7 @@ ${value_unwrap}\
}
% endif # handle call parameters
% if mc.request_value:
<%
allow_optionals_fn = lambda s: is_schema_with_optionals(schema_markers(s, c, transitive=False))
def flatten_schema_fields(schema, res, init_fn_map, cur=list(), init_call=None):
if len(cur) == 0:
init_call = ''
cur = list()
opt_access = '.as_mut().unwrap()'
allow_optionals = allow_optionals_fn(schema)
parent_init_call = init_call
if not allow_optionals:
opt_access = ''
for fn, f in schema.fields.iteritems():
cur.append(['%s%s' % (mangle_ident(fn), opt_access), fn])
if isinstance(f, SchemaEntry):
cur[-1][0] = mangle_ident(fn)
res.append((init_call, schema, f, list(cur)))
else:
if allow_optionals:
init_fn_name = 'request_%s_init' % '_'.join(mangle_ident(t[1]) for t in cur)
init_call = init_fn_name + '(&mut request);'
struct_field = 'request.' + '.'.join('%s%s' % (mangle_ident(t[1]), opt_access) for t in cur[:-1])
if len(cur) > 1:
struct_field += '.'
struct_field += mangle_ident(cur[-1][1])
init_fn = "fn %s(request: &mut api::%s) {\n" % (init_fn_name, request_prop_type)
if parent_init_call:
pcall = parent_init_call[:parent_init_call.index('(')] + "(request)"
init_fn += " %s;\n" % pcall
init_fn += " if %s.is_none() {\n" % struct_field
init_fn += " %s = Some(Default::default());\n" % struct_field
init_fn += " }\n"
init_fn += "}\n"
init_fn_map[init_fn_name] = init_fn
# end handle init
flatten_schema_fields(f, res, init_fn_map, cur, init_call)
cur.pop()
# endfor
# end utility
schema_fields = list()
init_fn_map = dict()
flatten_schema_fields(request_cli_schema, schema_fields, init_fn_map)
%>\
let mut field_name: FieldCursor = Default::default();
for kvarg in ${SOPT + arg_ident(KEY_VALUE_ARG)}.iter() {
let (key, value) = parse_kv_arg(&*kvarg, err);
if let Err(field_err) = field_name.set(&*key) {
err.issues.push(field_err);
}
% for name in sorted(init_fn_map.keys()):
${init_fn_map[name] | indent_by(4)}
% endfor
match &field_name.to_string()[..] {
% for init_call, schema, fe, f in schema_fields:
<%
# TODO: Deduplicate !
ptype = fe.actual_property.type
if ptype == 'string' and 'Count' in f[-1][1]:
ptype = 'int64'
value_unwrap = 'value.unwrap_or("%s")' % JSON_TYPE_VALUE_MAP[ptype]
pname = FIELD_SEP.join(mangle_subcommand(t[1]) for t in f)
allow_optionals = True
opt_prefix = 'Some('
opt_suffix = ')'
opt_access = '.as_mut().unwrap()'
if not allow_optionals_fn(schema):
opt_prefix = opt_suffix = opt_access = ''
struct_field = 'request.' + '.'.join(t[0] for t in f)
%>\
"${pname}" => {
% if init_call:
${init_call}
% endif
% if fe.container_type == CTYPE_POD:
${struct_field} = ${opt_prefix}\
% else:
% if opt_prefix:
if ${struct_field}.is_none() {
${struct_field} = Some(Default::default());
}
% endif
${struct_field}${opt_access}.push(\
% endif
% if ptype != 'string':
arg_from_str(${value_unwrap}, err, "${pname}", "${ptype}")\
% else:
${value_unwrap}.to_string()\
% endif
% if fe.container_type == CTYPE_POD:
${opt_suffix}\
% else:
)\
% endif
;
},
% endfor # each nested field
_ => {
err.issues.push(CLIError::Field(FieldError::Unknown(field_name.to_string())));
}
}
}
${self._request_value_impl(c, request_cli_schema)}\
% endif # handle struct parsing
% if mc.media_params:
let protocol =
@@ -415,4 +308,110 @@ if dry_run {
}
}
}\
</%def>
<%def name="_request_value_impl(c, request_cli_schema)">
<%
allow_optionals_fn = lambda s: is_schema_with_optionals(schema_markers(s, c, transitive=False))
def flatten_schema_fields(schema, res, init_fn_map, cur=list(), init_call=None):
if len(cur) == 0:
init_call = ''
cur = list()
opt_access = '.as_mut().unwrap()'
allow_optionals = allow_optionals_fn(schema)
parent_init_call = init_call
if not allow_optionals:
opt_access = ''
for fn, f in schema.fields.iteritems():
cur.append(['%s%s' % (mangle_ident(fn), opt_access), fn])
if isinstance(f, SchemaEntry):
cur[-1][0] = mangle_ident(fn)
res.append((init_call, schema, f, list(cur)))
else:
if allow_optionals:
init_fn_name = 'request_%s_init' % '_'.join(mangle_ident(t[1]) for t in cur)
init_call = init_fn_name + '(&mut request);'
struct_field = 'request.' + '.'.join('%s%s' % (mangle_ident(t[1]), opt_access) for t in cur[:-1])
if len(cur) > 1:
struct_field += '.'
struct_field += mangle_ident(cur[-1][1])
init_fn = "fn %s(request: &mut api::%s) {\n" % (init_fn_name, request_prop_type)
if parent_init_call:
pcall = parent_init_call[:parent_init_call.index('(')] + "(request)"
init_fn += " %s;\n" % pcall
init_fn += " if %s.is_none() {\n" % struct_field
init_fn += " %s = Some(Default::default());\n" % struct_field
init_fn += " }\n"
init_fn += "}\n"
init_fn_map[init_fn_name] = init_fn
# end handle init
flatten_schema_fields(f, res, init_fn_map, cur, init_call)
cur.pop()
# endfor
# end utility
schema_fields = list()
init_fn_map = dict()
flatten_schema_fields(request_cli_schema, schema_fields, init_fn_map)
%>\
let mut field_name = FieldCursor::default();
for kvarg in ${SOPT + arg_ident(KEY_VALUE_ARG)}.iter() {
let (key, value) = parse_kv_arg(&*kvarg, err);
if let Err(field_err) = field_name.set(&*key) {
err.issues.push(field_err);
}
% for name in sorted(init_fn_map.keys()):
${init_fn_map[name] | indent_by(4)}
% endfor
match &field_name.to_string()[..] {
% for init_call, schema, fe, f in schema_fields:
<%
ptype = actual_json_type(f[-1][1], fe.actual_property.type)
value_unwrap = 'value.unwrap_or("%s")' % JSON_TYPE_VALUE_MAP[ptype]
pname = FIELD_SEP.join(mangle_subcommand(t[1]) for t in f)
allow_optionals = True
opt_prefix = 'Some('
opt_suffix = ')'
opt_access = '.as_mut().unwrap()'
if not allow_optionals_fn(schema):
opt_prefix = opt_suffix = opt_access = ''
struct_field = 'request.' + '.'.join(t[0] for t in f)
%>\
"${pname}" => {
% if init_call:
${init_call}
% endif
% if fe.container_type == CTYPE_POD:
${struct_field} = ${opt_prefix}\
% else:
% if opt_prefix:
if ${struct_field}.is_none() {
${struct_field} = Some(Default::default());
}
% endif
${struct_field}${opt_access}.push(\
% endif
% if ptype != 'string':
arg_from_str(${value_unwrap}, err, "${pname}", "${ptype}")\
% else:
${value_unwrap}.to_string()\
% endif
% if fe.container_type == CTYPE_POD:
${opt_suffix}\
% else:
)\
% endif
;
},
% endfor # each nested field
_ => {
err.issues.push(CLIError::Field(FieldError::Unknown(field_name.to_string())));
}
}
}
</%def>