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matrix-spec-proposals/templating/matrix_templates/units.py

583 lines
23 KiB
Python

"""
Contains all the units for the spec.
This file loads swagger and JSON schema files and parses out the useful bits
and returns them as Units for use in Batesian.
For the actual conversion of data -> RST (including templates), see the sections
file instead.
"""
from batesian.units import Units
import inspect
import json
import os
import re
import subprocess
import urllib
import yaml
V1_CLIENT_API = "../api/client-server/v1"
V1_EVENT_EXAMPLES = "../event-schemas/examples/v1"
V1_EVENT_SCHEMA = "../event-schemas/schema/v1"
CORE_EVENT_SCHEMA = "../event-schemas/schema/v1/core-event-schema"
CHANGELOG = "../CHANGELOG.rst"
TARGETS = "../specification/targets.yaml"
ROOM_EVENT = "core-event-schema/room_event.json"
STATE_EVENT = "core-event-schema/state_event.json"
def get_json_schema_object_fields(obj, enforce_title=False):
# Algorithm:
# f.e. property => add field info (if field is object then recurse)
if obj.get("type") != "object":
raise Exception(
"get_json_schema_object_fields: Object %s isn't an object." % obj
)
if enforce_title and not obj.get("title"):
raise Exception(
"get_json_schema_object_fields: Nested object %s doesn't have a title." % obj
)
required_keys = obj.get("required")
if not required_keys:
required_keys = []
fields = {
"title": obj.get("title"),
"rows": []
}
tables = [fields]
parents = obj.get("allOf")
props = obj.get("properties")
if not props:
props = obj.get("patternProperties")
if props:
# try to replace horrible regex key names with pretty x-pattern ones
for key_name in props.keys():
pretty_key = props[key_name].get("x-pattern")
if pretty_key:
props[pretty_key] = props[key_name]
del props[key_name]
if not props and not parents:
raise Exception(
"Object %s has no properties or parents." % obj
)
if not props: # parents only
return [{
"title": obj["title"],
"parent": parents[0]["$ref"],
"no-table": True
}]
for key_name in sorted(props):
value_type = None
required = key_name in required_keys
desc = props[key_name].get("description", "")
if props[key_name]["type"] == "object":
if props[key_name].get("additionalProperties"):
# not "really" an object, just a KV store
prop_val = props[key_name]["additionalProperties"]["type"]
if prop_val == "object":
nested_object = get_json_schema_object_fields(
props[key_name]["additionalProperties"],
enforce_title=True
)
value_type = "{string: %s}" % nested_object[0]["title"]
if not nested_object[0].get("no-table"):
tables += nested_object
else:
value_type = "{string: %s}" % prop_val
else:
nested_object = get_json_schema_object_fields(
props[key_name],
enforce_title=True
)
value_type = "{%s}" % nested_object[0]["title"]
if not nested_object[0].get("no-table"):
tables += nested_object
elif props[key_name]["type"] == "array":
# if the items of the array are objects then recurse
if props[key_name]["items"]["type"] == "object":
nested_object = get_json_schema_object_fields(
props[key_name]["items"],
enforce_title=True
)
value_type = "[%s]" % nested_object[0]["title"]
tables += nested_object
else:
value_type = "[%s]" % props[key_name]["items"]["type"]
else:
value_type = props[key_name]["type"]
if props[key_name].get("enum"):
if len(props[key_name].get("enum")) > 1:
value_type = "enum"
desc += (
" One of: %s" % json.dumps(props[key_name]["enum"])
)
else:
desc += (
" Must be '%s'." % props[key_name]["enum"][0]
)
if isinstance(value_type, list):
value_type = " or ".join(value_type)
fields["rows"].append({
"key": key_name,
"type": value_type,
"required": required,
"desc": desc,
"req_str": "**Required.** " if required else ""
})
return tables
class MatrixUnits(Units):
def _load_swagger_meta(self, api, group_name):
endpoints = []
for path in api["paths"]:
for method in api["paths"][path]:
single_api = api["paths"][path][method]
full_path = api.get("basePath", "") + path
endpoint = {
"title": single_api.get("summary", ""),
"desc": single_api.get("description", single_api.get("summary", "")),
"method": method.upper(),
"path": full_path,
"requires_auth": "security" in single_api,
"rate_limited": 429 in single_api.get("responses", {}),
"req_params": [],
"res_tables": [],
"example": {
"req": "",
"responses": [],
"good_response": ""
}
}
self.log(" ------- Endpoint: %s %s ------- " % (method, path))
for param in single_api.get("parameters", []):
# description
desc = param.get("description", "")
if param.get("required"):
desc = "**Required.** " + desc
# assign value expected for this param
val_type = param.get("type") # integer/string
refType = Units.prop(param, "schema/$ref/") # Error,Event
schemaFmt = Units.prop(param, "schema/format") # bytes e.g. uploads
if not val_type and refType:
val_type = refType # TODO: Resolve to human-readable.
if not val_type and schemaFmt:
val_type = schemaFmt
if val_type:
endpoint["req_params"].append({
"key": param["name"],
"loc": param["in"],
"type": val_type,
"desc": desc
})
continue
# If we're here, either the param has no value or it is an
# object which we haven't $reffed (so probably just a json
# object with some keys; we'll add entries f.e one)
if "schema" not in param:
raise Exception(
("API endpoint group=%s path=%s method=%s param=%s"+
" has no valid parameter value.") % (
group_name, path, method, param
)
)
if Units.prop(param, "schema/type") != "object":
raise Exception(
("API endpoint group=%s path=%s method=%s defines a"+
" param with a schema which isn't an object. Array?")
% (group_name, path, method)
)
# loop top-level json keys
json_body = Units.prop(param, "schema/properties")
for key in json_body:
endpoint["req_params"].append({
"key": key,
"loc": "JSON body",
"type": json_body[key]["type"],
"desc": json_body[key]["description"]
})
# endfor[param]
for row in endpoint["req_params"]:
self.log("Request parameter: %s" % row)
# group params by location to ease templating
endpoint["req_param_by_loc"] = {
# path: [...], query: [...], body: [...]
}
for p in endpoint["req_params"]:
if p["loc"] not in endpoint["req_param_by_loc"]:
endpoint["req_param_by_loc"][p["loc"]] = []
endpoint["req_param_by_loc"][p["loc"]].append(p)
good_response = None
for code, res in single_api.get("responses", {}).items():
if not good_response and code == 200:
good_response = res
description = res.get("description", "")
example = res.get("examples", {}).get("application/json", "")
if description and example:
endpoint["example"]["responses"].append({
"code": code,
"description": description,
"example": example,
})
# form example request if it has one. It "has one" if all params
# have either "x-example" or a "schema" with an "example".
params_missing_examples = [
p for p in single_api.get("parameters", []) if (
"x-example" not in p and
not Units.prop(p, "schema/example")
)
]
if len(params_missing_examples) == 0:
path_template = api.get("basePath", "") + path
qps = {}
body = ""
for param in single_api.get("parameters", []):
if param["in"] == "path":
path_template = path_template.replace(
"{%s}" % param["name"], urllib.quote(
param["x-example"]
)
)
elif param["in"] == "body":
body = param["schema"]["example"]
elif param["in"] == "query":
qps[param["name"]] = param["x-example"]
query_string = "" if len(qps) == 0 else "?"+urllib.urlencode(qps)
endpoint["example"]["req"] = "%s %s%s\n%s" % (
method.upper(), path_template, query_string, body
)
else:
self.log(
"The following parameters are missing examples :( \n %s" %
[ p["name"] for p in params_missing_examples ]
)
# add response params if this API has any.
if good_response:
self.log("Found a 200 response for this API")
res_type = Units.prop(good_response, "schema/type")
if res_type and res_type not in ["object", "array"]:
# response is a raw string or something like that
endpoint["res_tables"].append({
"title": None,
"rows": [{
"key": good_response["schema"].get("name", ""),
"type": res_type,
"desc": res.get("description", ""),
"req_str": ""
}]
})
elif res_type and Units.prop(good_response, "schema/properties"):
# response is an object:
schema = good_response["schema"]
res_tables = get_json_schema_object_fields(schema)
for table in res_tables:
if "no-table" not in table:
endpoint["res_tables"].append(table)
elif res_type and Units.prop(good_response, "schema/items"):
# response is an array:
# FIXME: Doesn't recurse at all.
schema = good_response["schema"]
array_type = Units.prop(schema, "items/type")
if Units.prop(schema, "items/allOf"):
array_type = (
Units.prop(schema, "items/title")
)
endpoint["res_tables"].append({
"title": schema.get("title", ""),
"rows": [{
"key": "N/A",
"type": ("[%s]" % array_type),
"desc": schema.get("description", ""),
"req_str": ""
}]
})
for response_table in endpoint["res_tables"]:
self.log("Response: %s" % response_table["title"])
for r in response_table["rows"]:
self.log("Row: %s" % r)
if len(endpoint["res_tables"]) == 0:
self.log(
"This API appears to have no response table. Are you " +
"sure this API returns no parameters?"
)
endpoints.append(endpoint)
aliases = single_api.get("x-alias", None)
if aliases:
alias_link = aliases["canonical-link"]
for alias in aliases["aliases"]:
endpoints.append({
"method": method.upper(),
"path": alias,
"alias_for_path": full_path,
"alias_link": alias_link
})
return {
"base": api.get("basePath"),
"group": group_name,
"endpoints": endpoints,
}
def load_swagger_apis(self):
path = V1_CLIENT_API
apis = {}
for filename in os.listdir(path):
if not filename.endswith(".yaml"):
continue
self.log("Reading swagger API: %s" % filename)
with open(os.path.join(path, filename), "r") as f:
# strip .yaml
group_name = filename[:-5]
api = yaml.load(f.read())
api["__meta"] = self._load_swagger_meta(api, group_name)
apis[group_name] = api
return apis
def load_common_event_fields(self):
path = CORE_EVENT_SCHEMA
event_types = {}
for (root, dirs, files) in os.walk(path):
for filename in files:
if not filename.endswith(".json"):
continue
event_type = filename[:-5] # strip the ".json"
filepath = os.path.join(root, filename)
with open(filepath) as f:
try:
event_info = json.load(f)
except Exception as e:
raise ValueError(
"Error reading file %r" % (filepath,), e
)
if "event" not in event_type:
continue # filter ImageInfo and co
table = {
"title": event_info["title"],
"desc": event_info["description"],
"rows": []
}
for prop in sorted(event_info["properties"]):
row = {
"key": prop,
"type": event_info["properties"][prop]["type"],
"desc": event_info["properties"][prop].get("description","")
}
table["rows"].append(row)
event_types[event_type] = table
return event_types
def load_event_examples(self):
path = V1_EVENT_EXAMPLES
examples = {}
for filename in os.listdir(path):
if not filename.startswith("m."):
continue
with open(os.path.join(path, filename), "r") as f:
examples[filename] = json.loads(f.read())
if filename == "m.room.message#m.text":
examples["m.room.message"] = examples[filename]
return examples
def load_event_schemas(self):
path = V1_EVENT_SCHEMA
schemata = {}
for filename in os.listdir(path):
if not filename.startswith("m."):
continue
self.log("Reading %s" % os.path.join(path, filename))
with open(os.path.join(path, filename), "r") as f:
json_schema = json.loads(f.read())
schema = {
"typeof": None,
"typeof_info": "",
"type": None,
"title": None,
"desc": None,
"msgtype": None,
"content_fields": [
# {
# title: "<title> key"
# rows: [
# { key: <key_name>, type: <string>,
# desc: <desc>, required: <bool> }
# ]
# }
]
}
# add typeof
base_defs = {
ROOM_EVENT: "Message Event",
STATE_EVENT: "State Event"
}
if type(json_schema.get("allOf")) == list:
schema["typeof"] = base_defs.get(
json_schema["allOf"][0].get("$ref")
)
elif json_schema.get("title"):
schema["typeof"] = json_schema["title"]
# add type
schema["type"] = Units.prop(
json_schema, "properties/type/enum"
)[0]
# add summary and desc
schema["title"] = json_schema.get("title")
schema["desc"] = json_schema.get("description", "")
# walk the object for field info
schema["content_fields"] = get_json_schema_object_fields(
Units.prop(json_schema, "properties/content")
)
# grab msgtype if it is the right kind of event
msgtype = Units.prop(
json_schema, "properties/content/properties/msgtype/enum"
)
if msgtype:
schema["msgtype"] = msgtype[0] # enum prop
# link to msgtypes for m.room.message
if schema["type"] == "m.room.message" and not msgtype:
schema["desc"] += (
" For more information on ``msgtypes``, see "+
"`m.room.message msgtypes`_."
)
# Assign state key info if it has some
if schema["typeof"] == "State Event":
skey_desc = Units.prop(
json_schema, "properties/state_key/description"
)
if not skey_desc:
raise Exception("Missing description for state_key")
schema["typeof_info"] = "``state_key``: %s" % skey_desc
schemata[filename] = schema
return schemata
def load_spec_meta(self):
path = CHANGELOG
title_part = None
version = None
changelog_lines = []
with open(path, "r") as f:
prev_line = None
for line in f.readlines():
if line.strip().startswith(".. "):
continue # comment
if prev_line is None:
prev_line = line
continue
if not title_part:
# find the title underline (at least 3 =)
if re.match("^[=]{3,}$", line.strip()):
title_part = prev_line
continue
prev_line = line
else: # have title, get body (stop on next title or EOF)
if re.match("^[=]{3,}$", line.strip()):
# we added the title in the previous iteration, pop it
# then bail out.
changelog_lines.pop()
break
changelog_lines.append(line)
# parse out version from title
for word in title_part.split():
if re.match("^v[0-9\.]+$", word):
version = word[1:] # strip the 'v'
self.log("Version: %s Title part: %s Changelog line count: %s" % (
version, title_part, len(changelog_lines)
))
if not version or len(changelog_lines) == 0:
raise Exception("Failed to parse CHANGELOG.rst")
return {
"version": version,
"changelog": "".join(changelog_lines)
}
def load_spec_targets(self):
with open(TARGETS, "r") as f:
return yaml.load(f.read())
def load_git_version(self):
null = open(os.devnull, 'w')
cwd = os.path.dirname(os.path.abspath(__file__))
try:
git_branch = subprocess.check_output(
['git', 'rev-parse', '--abbrev-ref', 'HEAD'],
stderr=null,
cwd=cwd,
).strip()
except subprocess.CalledProcessError:
git_branch = ""
try:
git_tag = subprocess.check_output(
['git', 'describe', '--exact-match'],
stderr=null,
cwd=cwd,
).strip()
git_tag = "tag=" + git_tag
except subprocess.CalledProcessError:
git_tag = ""
try:
git_commit = subprocess.check_output(
['git', 'rev-parse', '--short', 'HEAD'],
stderr=null,
cwd=cwd,
).strip()
except subprocess.CalledProcessError:
git_commit = ""
try:
dirty_string = "-this_is_a_dirty_checkout"
is_dirty = subprocess.check_output(
['git', 'describe', '--dirty=' + dirty_string, "--all"],
stderr=null,
cwd=cwd,
).strip().endswith(dirty_string)
git_dirty = "dirty" if is_dirty else ""
except subprocess.CalledProcessError:
git_dirty = ""
git_version = "Unknown"
if git_branch or git_tag or git_commit or git_dirty:
git_version = ",".join(
s for s in
(git_branch, git_tag, git_commit, git_dirty,)
if s
).encode("ascii")
return {
"string": git_version,
"revision": git_commit
}