chore: pr-review-tooling (#434)

# Motivation

<!-- Why is this change necessary? -->

# Content

<!-- Please include a summary of the change -->

# Testing

<!-- How was the change tested? -->

# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

---------

Co-authored-by: kopekC <28070492+kopekC@users.noreply.github.com>

Author: kopekC

codegen-examples/examples/pr_review_bot/run.py

@@ -1,7 +1,7 @@
 import codegen
 from codegen import Codebase
-from codegen.sdk.enums import ProgrammingLanguage
-from codegen.sdk.codebase.config import CodebaseConfig
+from codegen.shared.enums.programming_language import ProgrammingLanguage
+from codegen.sdk.codebase.config import CodebaseConfig, Secrets
 import json
 
 from codegen.sdk.secrets import Secrets
@@ -20,13 +20,9 @@ def run(codebase: Codebase):
     modified_symbols = codebase.get_modified_symbols_in_pr(pr_number)
     for symbol in modified_symbols:
         # Get direct dependencies
-        deps = codebase.get_symbol_dependencies(symbol, max_depth=2)
+        deps = symbol.dependencies(max_depth=2)
         context_symbols.update(deps)
 
-        # Get reverse dependencies (symbols that depend on this one)
-        rev_deps = codebase.get_symbol_dependents(symbol, max_depth=2)
-        context_symbols.update(rev_deps)
-
     # Prepare context for LLM
     context = {
         "modified_symbols": [

src/codegen/git/repo_operator/local_repo_operator.py

@@ -183,7 +183,7 @@ def get_pull_request(self, pr_number: int) -> PullRequest | None:
             if repo is None:
                 logger.warning("GitHub API key is required to fetch pull requests")
                 return None
-            return repo.get_pull(pr_number)
+            return repo.get_pull_safe(pr_number)
         except Exception as e:
             logger.warning(f"Failed to get PR {pr_number}: {e!s}")
             return None

src/codegen/git/repo_operator/repo_operator.py

@@ -600,3 +600,11 @@ def stash_push(self) -> None:
 
     def stash_pop(self) -> None:
         self.git_cli.git.stash("pop")
+
+    ####################################################################################################################
+    # PR UTILITIES
+    ####################################################################################################################
+
+    def get_pr_data(self, pr_number: int) -> dict:
+        """Returns the data associated with a PR"""
+        return self.remote_git_repo.get_pr_data(pr_number)

src/codegen/git/utils/pr_review.py

@@ -127,3 +127,20 @@ def modified_symbols(self) -> list["Symbol"]:
                 if self.is_modified(symbol):
                     all_modified.append(symbol)
         return all_modified
+
+    def get_pr_diff(self) -> str:
+        """Get the full diff of the PR"""
+        if not self._op.remote_git_repo:
+            msg = "GitHub API client is required to get PR diffs"
+            raise ValueError(msg)
+
+        # Get the diff directly from the PR
+        diff_url = self._gh_pr.raw_data.get("diff_url")
+        if diff_url:
+            # Fetch the diff content from the URL
+            response = requests.get(diff_url)
+            response.raise_for_status()
+            return response.text
+        else:
+            # If diff_url not available, get the patch directly
+            return self._gh_pr.get_patch()

src/codegen/sdk/core/codebase.py

@@ -1259,11 +1259,12 @@ def from_repo(
             logger.exception(f"Failed to initialize codebase: {e}")
             raise
 
-    def get_modified_symbols_in_pr(self, pr_id: int) -> list[Symbol]:
+    def get_modified_symbols_in_pr(self, pr_id: int) -> tuple[list[Symbol], str]:
         """Get all modified symbols in a pull request"""
         pr = self._op.get_pull_request(pr_id)
         cg_pr = CodegenPR(self._op, self, pr)
-        return cg_pr.modified_symbols
+        patch = cg_pr.get_pr_diff()
+        return cg_pr.modified_symbols, patch
 
 
 # The last 2 lines of code are added to the runner. See codegen-backend/cli/generate/utils.py