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graphql.py
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graphql.py
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"""Provides a class to manage the publication of markdown posts to a Hashnode publication."""
from datetime import datetime
from typing import Any, Dict, List, Optional, Union
from zoneinfo import ZoneInfo
import requests
from constants import HASHNODE_API_URL, HEADERS, PUBLICATION_HOST
class HashnodeAPI:
"""Manage the publication of markdown posts to a Hashnode publication."""
def __init__(self, timeout: int = 30) -> None:
"""Initialize the HashnodeAPI class with a timeout and obtain the publication ID."""
self.timeout = timeout
self.debug_data: List[List[Union[datetime, str]]] = []
self.publication_id = self._fetch_publication_id()
def _fetch_publication_id(self) -> str:
"""Fetch the publication ID for the given host."""
query = """
query Publication($host: String!) {
publication(host: $host) {
id
}
}
"""
response = self._execute_request(query, variables={"host": PUBLICATION_HOST})
publication_id = response["data"]["publication"]["id"]
self.debug_data.append(
[datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"), f"Publication ID: {publication_id}"]
)
return publication_id
def get_post_id(self, slug: str) -> Optional[str]:
"""Get the post ID for the given publication and slug."""
query = """
query GetPost($host: String!, $slug: String!) {
publication(host: $host) {
post(slug: $slug) {
id
}
}
}
"""
response = self._execute_request(query, variables={"host": PUBLICATION_HOST, "slug": slug})
if "errors" in response:
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"GraphQL errors: {response['errors']}, Slug: {slug}",
]
)
return None
post = response["data"]["publication"].get("post")
post_id = post["id"] if post else None
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Got post id {post_id} for {slug}, Post: {post if post else None}",
]
)
return post_id
def get_all_publication_posts(self) -> List[Dict[str, str]]:
"""Get a list of all post IDs and slugs for a publication."""
query = """
query GetPosts($host: String!, $first: Int!, $after: String) {
publication(host: $host) {
posts(first: $first, after: $after) {
edges {
node {
id
slug
}
}
pageInfo {
endCursor
hasNextPage
}
}
}
}
"""
all_posts = []
variables = {"host": PUBLICATION_HOST, "first": 50, "after": None}
while True:
response = self._execute_request(query, variables=variables)
posts_data = response["data"]["publication"]["posts"]
all_posts.extend({"id": edge["node"]["id"], "slug": edge["node"]["slug"]} for edge in posts_data["edges"])
if not posts_data["pageInfo"]["hasNextPage"]:
break
variables["after"] = posts_data["pageInfo"]["endCursor"]
return all_posts
def create_post(self, post_data: Dict[str, Any]) -> Dict[str, str]:
"""Create a post with the given data."""
mutation = """
mutation PublishPost($input: PublishPostInput!) {
publishPost(input: $input) {
post {
id
title
slug
}
}
}
"""
response = self._execute_request(mutation, variables={"input": post_data})
return self._extract_post_data(response, "Create Post", post_data)
def update_post(self, post_data: Dict[str, Any]) -> Dict[str, str]:
"""Update a post with the given data."""
mutation = """
mutation UpdatePost($input: UpdatePostInput!) {
updatePost(input: $input) {
post {
id
title
slug
}
}
}
"""
response = self._execute_request(mutation, variables={"input": post_data})
return self._extract_post_data(response, "Update Post", post_data)
def delist_post(self, post_id: str) -> bool:
"""Delist (soft-delete) the post with the given ID."""
mutation = """
mutation UpdatePost($input: UpdatePostInput!) {
updatePost(input: $input) {
post {
id
preferences {
isDelisted
}
}
}
}
"""
post_data = {"id": post_id, "preferences": {"isDelisted": True}}
response = self._execute_request(mutation, variables={"input": post_data})
try:
delisted = response["data"]["updatePost"]["post"]["preferences"]["isDelisted"]
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Delisted post: {post_id}, Delisted: {delisted}",
]
)
return delisted
except KeyError:
self._log_failure("Failed to delist post", post_id, response)
return False
def _execute_request(self, query: str, variables: Dict[str, Any]) -> Dict[str, Any]:
"""Execute a GraphQL request and return the JSON response."""
response = requests.post(
url=HASHNODE_API_URL,
json={"query": query, "variables": variables},
headers=HEADERS,
timeout=self.timeout,
)
try:
response.raise_for_status()
except requests.exceptions.HTTPError as e:
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Request failed with status code {response.status_code}: {response.text}. "
f"{query=}, {variables=}. Original exception: {e}.",
]
)
return {}
except requests.exceptions.RequestException as e:
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Request failed with {response.text=}: {e}. {query=}, {variables=}.",
]
)
return {}
except Exception as e: # pylint: disable=W0718
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Unexpected error {response.text=}: {e}. {query=}, {variables=}.",
]
)
return {}
return response.json()
def _extract_post_data(self, response: Dict[str, Any], action: str, post_data: Dict[str, Any]) -> Dict[str, str]:
"""Extract post data from the response and handle errors."""
try:
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"Trying to get 'response['data']{action.split()[0].lower()}Post']['post']' for the post.",
]
)
post = response["data"][f"{action.split()[0].lower()}Post"]["post"]
if post:
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"{action}: {post['id']=}, {post['title']=}, {post['slug']=}",
]
)
else:
self._log_failure(f"Failed to {action.lower()} (No Post was returned in response)", post_data, response)
return post
except KeyError:
self._log_failure(f"Failed to {action.lower()}", post_data, response)
return {}
def _log_failure(self, message: str, identifier: str, response: Dict[str, Any]) -> None:
"""Log a failure with a given message, identifier, and response."""
self.debug_data.append(
[
datetime.now(ZoneInfo("UTC")).strftime("%Y-%m-%d %H:%M:%S:%f"),
f"{message}. {response=}. Tried using identifier: {identifier}.",
]
)