fix the rule

src/pr_lint/formatter.py

@@ -0,0 +1,41 @@
+import re
+
+from github.PullRequest import PullRequest
+
+emoji_pattern = re.compile(
+    "["
+    "\U0001F600-\U0001F64F"  # Emoticons
+    "\U0001F300-\U0001F5FF"  # Symbols & pictographs
+    "\U0001F680-\U0001F6FF"  # Transport & map symbols
+    "\U0001F1E0-\U0001F1FF"  # Flags (iOS)
+    "\U0001F900-\U0001F9FF"  # Supplemental Symbols and Pictographs
+    "\U0001FA70-\U0001FAFF"  # Symbols and Pictographs Extended-A
+    "\u2600-\u26FF"  # Miscellaneous Symbols
+    "\u2700-\u27BF"  # Dingbats
+    "]"
+)
+
+
+def format(pr: PullRequest) -> None:
+    """
+    Format a pull request:
+
+    1. Extract emojis from labels and insert them to the PR title
+
+    Args:
+        pr: The pull request to format
+    """
+
+    labels = pr.get_labels()
+    # remove all emojis from the left of title
+    cleaned_title = pr.title.lstrip("".join(emoji_pattern.findall(pr.title))).strip()
+
+    emojis = set()
+    for label in labels:
+        if _emjojis := emoji_pattern.findall(label.name):
+            emojis.update(_emjojis)
+
+    new_title = f"{''.join(emojis)} {cleaned_title}"
+    if new_title != pr.title:
+        pr.edit(title=new_title)
+        print(f"Updated PR title: {pr.title} -> {new_title}")

src/pr_lint/linter.py

@@ -0,0 +1,41 @@
+import re
+
+from github.Label import Label
+from github.PullRequest import PullRequest
+
+
+def lint(pr: PullRequest) -> None:
+    """
+    Lint a pull request:
+    1. checks if the PR title ends with a username (owner)
+    2. The username must be a collaborator
+    3. checks if there is exactly one Type label
+    4. checks if there is exactly one Impact label
+
+    Args:
+        pr: The pull request to lint
+    """
+
+    title = pr.title
+    repo = pr.base.repo
+
+    pr_owners = re.findall(r"(@[\w]+)$", title)
+    assert pr_owners, "PR title should end with a GitHub username"
+    pr_owner = pr_owners[0][1:]
+    assert repo.has_in_collaborators(pr_owner), f"{pr_owner} is not a collaborator"
+
+    labels = pr.get_labels()
+
+    type_labels: list[Label] = []
+    impact_labels: list[Label] = []
+
+    for label in labels:
+        if "Type:" in label.name:
+            type_labels.append(label)
+        elif "Impact:" in label.name:
+            impact_labels.append(label)
+
+    assert len(type_labels) == 1, "There should be exactly one Type label"
+    assert len(impact_labels) == 1, "There should be exactly one Impact label"
+
+    # TODO: check if the PR title is in the correct format (e.g. commitlint convention)

src/pr_lint/main.py

@@ -1,51 +1,14 @@
 import os
-import re
 
 import typer
-from github import Github, Label
+from github import Github
 
-emoji_pattern = re.compile(
-    "["
-    "\U0001F600-\U0001F64F"  # Emoticons
-    "\U0001F300-\U0001F5FF"  # Symbols & pictographs
-    "\U0001F680-\U0001F6FF"  # Transport & map symbols
-    "\U0001F1E0-\U0001F1FF"  # Flags (iOS)
-    "\U0001F900-\U0001F9FF"  # Supplemental Symbols and Pictographs
-    "\U0001FA70-\U0001FAFF"  # Symbols and Pictographs Extended-A
-    "\u2600-\u26FF"  # Miscellaneous Symbols
-    "\u2700-\u27BF"  # Dingbats
-    "]+"
-)
+from .formatter import format
+from .linter import lint
 
 app = typer.Typer()
 
 
-def extract_emoji(string: str) -> set[str]:
-    """
-    Extracts emojis from a string
-
-    Args:
-        string: The string to extract emojis from
-
-    Returns:
-        A set of emojis
-    """
-    return set(emoji_pattern.findall(string))
-
-
-def clean_title(input_string: str) -> str:
-    # remove starting and ending emojis
-    input_string = input_string.strip().rstrip("".join(extract_emoji(input_string)))
-    input_string = input_string.strip().lstrip("".join(extract_emoji(input_string)))
-    input_string = input_string.strip()
-
-    # TODO:
-    # rewrite title's type and scope?
-    # remove starting type and scope [\w]+:
-    # input_string = re.sub(r"^[\w\-\(\)\.]+:", "", input_string).strip()
-    return input_string
-
-
 @app.command()
 def main() -> None:
     token = os.getenv("GITHUB_TOKEN")
@@ -65,34 +28,8 @@ def main() -> None:
     # Get the pull request
     pr = repo.get_pull(int(pr_number))
 
-    labels = pr.get_labels()
-
-    type_labels: list[Label.Label] = []
-    other_labels: list[Label.Label] = []
-
-    for label in labels:
-        if "Type:" in label.name:
-            type_labels.append(label)
-        else:
-            other_labels.append(label)
-
-    assert len(type_labels) == 1, "There should be exactly one Type label"
-
-    # format new title as [Type Emoji][Title][Other Emojis]
-    type_emoji = "".join(extract_emoji(type_labels[0].name))
-    other_emojis = set()
-    for label in other_labels:
-        other_emojis.update(extract_emoji(label.name))
-    other_emojis_result = "".join(other_emojis)
-
-    new_title = clean_title(pr.title)
-    new_title = f"{type_emoji}{new_title}{other_emojis_result}"
-
-    if new_title != pr.title:
-        pr.edit(title=new_title)
-        print(f"Title changed from {pr.title} to {new_title}")
-    else:
-        print("Title is already correctly formatted")
+    lint(pr)
+    format(pr)
 
 
 if __name__ == "__main__":