iframe-proxy | Sunbelt Computer Software

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import yaml
from pocketflow import Node, BatchNode
from utils.crawl_github_files import crawl_github_files
from utils.call_llm import call_llm
from utils.crawl_local_files import crawl_local_files
# Helper to get content for specific file indices
def get_content_for_indices(files_data, indices):
    content_map = {}
    for i in indices:
        if 0 <= i < len(files_data):
            path, content = files_data[i]
            content_map[f"{i} # {path}"] = content # Use index + path as key for context
    return content_map
class FetchRepo(Node):
    def prep(self, shared):
        repo_url = shared.get("repo_url")
        local_dir = shared.get("local_dir")
        project_name = shared.get("project_name")
        if not project_name:
            # Basic name derivation from URL or directory
            if repo_url:
                project_name = repo_url.split('/')[-1].replace('.git', '')
            else:
                project_name = os.path.basename(os.path.abspath(local_dir))
            shared["project_name"] = project_name
        # Get file patterns directly from shared
        include_patterns = shared["include_patterns"]
        exclude_patterns = shared["exclude_patterns"]
        max_file_size = shared["max_file_size"]
        return {
            "repo_url": repo_url,
            "local_dir": local_dir,
            "token": shared.get("github_token"),
            "include_patterns": include_patterns,
            "exclude_patterns": exclude_patterns,
            "max_file_size": max_file_size,
            "use_relative_paths": True
    def exec(self, prep_res):
        if prep_res["repo_url"]:
            print(f"Crawling repository: {prep_res['repo_url']}...")
            result = crawl_github_files(
                repo_url=prep_res["repo_url"],
                token=prep_res["token"],
                include_patterns=prep_res["include_patterns"],
                exclude_patterns=prep_res["exclude_patterns"],
                max_file_size=prep_res["max_file_size"],
                use_relative_paths=prep_res["use_relative_paths"]
        else:
            print(f"Crawling directory: {prep_res['local_dir']}...")
            result = crawl_local_files(
                directory=prep_res["local_dir"],
                include_patterns=prep_res["include_patterns"],
                exclude_patterns=prep_res["exclude_patterns"],
                max_file_size=prep_res["max_file_size"],
                use_relative_paths=prep_res["use_relative_paths"]
        # Convert dict to list of tuples: [(path, content), ...]
        files_list = list(result.get("files", {}).items())
        if len(files_list) == 0:
            raise(ValueError("Failed to fetch files"))
        print(f"Fetched {len(files_list)} files.")
        return files_list
    def post(self, shared, prep_res, exec_res):
        shared["files"] = exec_res # List of (path, content) tuples
class IdentifyAbstractions(Node):
    def prep(self, shared):
        files_data = shared["files"]
        project_name = shared["project_name"]  # Get project name
        language = shared.get("language", "english") # Get language
        # Helper to create context from files, respecting limits (basic example)
        def create_llm_context(files_data):
            context = ""
            file_info = [] # Store tuples of (index, path)
            for i, (path, content) in enumerate(files_data):
                entry = f"--- File Index {i}: {path} ---\n{content}\n\n"
                context += entry
                file_info.append((i, path))
            return context, file_info # file_info is list of (index, path)
        context, file_info = create_llm_context(files_data)
        # Format file info for the prompt (comment is just a hint for LLM)
        file_listing_for_prompt = "\n".join([f"- {idx} # {path}" for idx, path in file_info])
        return context, file_listing_for_prompt, len(files_data), project_name, language # Return language
    def exec(self, prep_res):
        context, file_listing_for_prompt, file_count, project_name, language = prep_res  # Unpack project name and language
        print(f"Identifying abstractions using LLM...")
        # Add language instruction and hints only if not English
        language_instruction = ""
        name_lang_hint = ""
        desc_lang_hint = ""
        if language.lower() != "english":
            language_instruction = f"IMPORTANT: Generate the `name` and `description` for each abstraction in **{language.capitalize()}** language. Do NOT use English for these fields.\n\n"
            # Keep specific hints here as name/description are primary targets
            name_lang_hint = f" (value in {language.capitalize()})"
            desc_lang_hint = f" (value in {language.capitalize()})"
        prompt = f"""
For the project `{project_name}`:
Codebase Context:
{language_instruction}Analyze the codebase context.
Identify the top 5-10 core most important abstractions to help those new to the codebase.
For each abstraction, provide:
1. A concise `name`{name_lang_hint}.
2. A beginner-friendly `description` explaining what it is with a simple analogy, in around 100 words{desc_lang_hint}.
3. A list of relevant `file_indices` (integers) using the format `idx # path/comment`.
List of file indices and paths present in the context:
{file_listing_for_prompt}
Format the output as a YAML list of dictionaries:
    Query Processing{name_lang_hint}
  description: |
    Explains what the abstraction does.
    It's like a central dispatcher routing requests.{desc_lang_hint}
  file_indices:
    - 0 # path/to/file1.py
    - 3 # path/to/related.py
    Query Optimization{name_lang_hint}
  description: |
    Another core concept, similar to a blueprint for objects.{desc_lang_hint}
  file_indices:
    - 5 # path/to/another.js
# ... up to 10 abstractions
        response = call_llm(prompt)
        # --- Validation ---
        yaml_str = response.strip().split("```yaml")[1].split("```")[0].strip()
        abstractions = yaml.safe_load(yaml_str)
        if not isinstance(abstractions, list):
            raise ValueError("LLM Output is not a list")
        validated_abstractions = []
        for item in abstractions:
            if not isinstance(item, dict) or not all(k in item for k in ["name", "description", "file_indices"]):
                raise ValueError(f"Missing keys in abstraction item: {item}")
            if not isinstance(item["name"], str):
                 raise ValueError(f"Name is not a string in item: {item}")
            if not isinstance(item["description"], str):
                 raise ValueError(f"Description is not a string in item: {item}")
            if not isinstance(item["file_indices"], list):
                 raise ValueError(f"file_indices is not a list in item: {item}")
            # Validate indices
            validated_indices = []
            for idx_entry in item["file_indices"]:
                     if isinstance(idx_entry, int):
                         idx = idx_entry
                     elif isinstance(idx_entry, str) and '#' in idx_entry:
                          idx = int(idx_entry.split('#')[0].strip())
                          idx = int(str(idx_entry).strip())
                     if not (0 <= idx < file_count):
                         raise ValueError(f"Invalid file index {idx} found in item {item['name']}. Max index is {file_count - 1}.")
                     validated_indices.append(idx)
                 except (ValueError, TypeError):
                      raise ValueError(f"Could not parse index from entry: {idx_entry} in item {item['name']}")
            item["files"] = sorted(list(set(validated_indices)))
            # Store only the required fields
            validated_abstractions.append({
                "name": item["name"], # Potentially translated name
                "description": item["description"], # Potentially translated description
                "files": item["files"]
        print(f"Identified {len(validated_abstractions)} abstractions.")
        return validated_abstractions
    def post(self, shared, prep_res, exec_res):
        shared["abstractions"] = exec_res # List of {"name": str, "description": str, "files": [int]}
class AnalyzeRelationships(Node):
    def prep(self, shared):
        abstractions = shared["abstractions"] # Now contains 'files' list of indices, name/description potentially translated
        files_data = shared["files"]
        project_name = shared["project_name"]  # Get project name
        language = shared.get("language", "english") # Get language
        # Create context with abstraction names, indices, descriptions, and relevant file snippets
        context = "Identified Abstractions:\n"
        all_relevant_indices = set()
        abstraction_info_for_prompt = []
        for i, abstr in enumerate(abstractions):
            # Use 'files' which contains indices directly
            file_indices_str = ", ".join(map(str, abstr['files']))
            # Abstraction name and description might be translated already
            info_line = f"- Index {i}: {abstr['name']} (Relevant file indices: [{file_indices_str}])\n  Description: {abstr['description']}"
            context += info_line + "\n"
            abstraction_info_for_prompt.append(f"{i} # {abstr['name']}") # Use potentially translated name here too
            all_relevant_indices.update(abstr['files'])
        context += "\nRelevant File Snippets (Referenced by Index and Path):\n"
        # Get content for relevant files using helper
        relevant_files_content_map = get_content_for_indices(
            files_data,
            sorted(list(all_relevant_indices))
        # Format file content for context
        file_context_str = "\n\n".join(
            f"--- File: {idx_path} ---\n{content}"
            for idx_path, content in relevant_files_content_map.items()
        context += file_context_str
        return context, "\n".join(abstraction_info_for_prompt), project_name, language # Return language
    def exec(self, prep_res):
        context, abstraction_listing, project_name, language = prep_res  # Unpack project name and language
        print(f"Analyzing relationships using LLM...")
        # Add language instruction and hints only if not English
        language_instruction = ""
        lang_hint = ""
        list_lang_note = ""
        if language.lower() != "english":
            language_instruction = f"IMPORTANT: Generate the `summary` and relationship `label` fields in **{language.capitalize()}** language. Do NOT use English for these fields.\n\n"
            lang_hint = f" (in {language.capitalize()})"
            list_lang_note = f" (Names might be in {language.capitalize()})" # Note for the input list
        prompt = f"""
Based on the following abstractions and relevant code snippets from the project `{project_name}`:
List of Abstraction Indices and Names{list_lang_note}:
{abstraction_listing}
Context (Abstractions, Descriptions, Code):
{language_instruction}Please provide:
1. A high-level `summary` of the project's main purpose and functionality in a few beginner-friendly sentences{lang_hint}. Use markdown formatting with **bold** and *italic* text to highlight important concepts.
2. A list (`relationships`) describing the key interactions between these abstractions. For each relationship, specify:
    - `from_abstraction`: Index of the source abstraction (e.g., `0 # AbstractionName1`)
    - `to_abstraction`: Index of the target abstraction (e.g., `1 # AbstractionName2`)
    - `label`: A brief label for the interaction **in just a few words**{lang_hint} (e.g., "Manages", "Inherits", "Uses").
    Ideally the relationship should be backed by one abstraction calling or passing parameters to another.
    Simplify the relationship and exclude those non-important ones.
IMPORTANT: Make sure EVERY abstraction is involved in at least ONE relationship (either as source or target). Each abstraction index must appear at least once across all relationships.
Format the output as YAML:
  A brief, simple explanation of the project{lang_hint}.
  Can span multiple lines with **bold** and *italic* for emphasis.
relationships:
  - from_abstraction: 0 # AbstractionName1
    to_abstraction: 1 # AbstractionName2
    label: "Manages"{lang_hint}
  - from_abstraction: 2 # AbstractionName3
    to_abstraction: 0 # AbstractionName1
    label: "Provides config"{lang_hint}
  # ... other relationships
Now, provide the YAML output:
        response = call_llm(prompt)
        # --- Validation ---
        yaml_str = response.strip().split("```yaml")[1].split("```")[0].strip()
        relationships_data = yaml.safe_load(yaml_str)
        if not isinstance(relationships_data, dict) or not all(k in relationships_data for k in ["summary", "relationships"]):
            raise ValueError("LLM output is not a dict or missing keys ('summary', 'relationships')")
        if not isinstance(relationships_data["summary"], str):
             raise ValueError("summary is not a string")
        if not isinstance(relationships_data["relationships"], list):
             raise ValueError("relationships is not a list")
        # Validate relationships structure
        validated_relationships = []
        num_abstractions = len(abstraction_listing.split('\n'))
        for rel in relationships_data["relationships"]:
             # Check for 'label' key
             if not isinstance(rel, dict) or not all(k in rel for k in ["from_abstraction", "to_abstraction", "label"]):
                  raise ValueError(f"Missing keys (expected from_abstraction, to_abstraction, label) in relationship item: {rel}")
             # Validate 'label' is a string
             if not isinstance(rel["label"], str):
                  raise ValueError(f"Relationship label is not a string: {rel}")
             # Validate indices
             try:
                 from_idx = int(str(rel["from_abstraction"]).split('#')[0].strip())
                 to_idx = int(str(rel["to_abstraction"]).split('#')[0].strip())
                 if not (0 <= from_idx < num_abstractions and 0 <= to_idx < num_abstractions):
                      raise ValueError(f"Invalid index in relationship: from={from_idx}, to={to_idx}. Max index is {num_abstractions-1}.")
                 validated_relationships.append({
                     "from": from_idx,
                     "to": to_idx,
                     "label": rel["label"] # Potentially translated label
             except (ValueError, TypeError):
                  raise ValueError(f"Could not parse indices from relationship: {rel}")
        print("Generated project summary and relationship details.")
        return {
            "summary": relationships_data["summary"], # Potentially translated summary
            "details": validated_relationships # Store validated, index-based relationships with potentially translated labels
    def post(self, shared, prep_res, exec_res):
        # Structure is now {"summary": str, "details": [{"from": int, "to": int, "label": str}]}
        # Summary and label might be translated
        shared["relationships"] = exec_res
class OrderChapters(Node):
    def prep(self, shared):
        abstractions = shared["abstractions"] # Name/description might be translated
        relationships = shared["relationships"] # Summary/label might be translated
        project_name = shared["project_name"]  # Get project name
        language = shared.get("language", "english") # Get language
        # Prepare context for the LLM
        abstraction_info_for_prompt = []
        for i, a in enumerate(abstractions):
            abstraction_info_for_prompt.append(f"- {i} # {a['name']}") # Use potentially translated name
        abstraction_listing = "\n".join(abstraction_info_for_prompt)
        # Use potentially translated summary and labels
        summary_note = ""
        if language.lower() != "english":
             summary_note = f" (Note: Project Summary might be in {language.capitalize()})"
        context = f"Project Summary{summary_note}:\n{relationships['summary']}\n\n"
        context += "Relationships (Indices refer to abstractions above):\n"
        for rel in relationships['details']:
             from_name = abstractions[rel['from']]['name']
             to_name = abstractions[rel['to']]['name']
             # Use potentially translated 'label'
             context += f"- From {rel['from']} ({from_name}) to {rel['to']} ({to_name}): {rel['label']}\n" # Label might be translated
        list_lang_note = ""
        if language.lower() != "english":
             list_lang_note = f" (Names might be in {language.capitalize()})"
        return abstraction_listing, context, len(abstractions), project_name, list_lang_note
    def exec(self, prep_res):
        abstraction_listing, context, num_abstractions, project_name, list_lang_note = prep_res
        print("Determining chapter order using LLM...")
        # No language variation needed here in prompt instructions, just ordering based on structure
        # The input names might be translated, hence the note.
        prompt = f"""
Given the following project abstractions and their relationships for the project ```` {project_name} ````:
Abstractions (Index # Name){list_lang_note}:
{abstraction_listing}
Context about relationships and project summary:
If you are going to make a tutorial for ```` {project_name} ````, what is the best order to explain these abstractions, from first to last?
Ideally, first explain those that are the most important or foundational, perhaps user-facing concepts or entry points. Then move to more detailed, lower-level implementation details or supporting concepts.
Output the ordered list of abstraction indices, including the name in a comment for clarity. Use the format `idx # AbstractionName`.
- 2 # FoundationalConcept
- 0 # CoreClassA
- 1 # CoreClassB (uses CoreClassA)
Now, provide the YAML output:
        response = call_llm(prompt)
        # --- Validation ---
        yaml_str = response.strip().split("```yaml")[1].split("```")[0].strip()
        ordered_indices_raw = yaml.safe_load(yaml_str)
        if not isinstance(ordered_indices_raw, list):
            raise ValueError("LLM output is not a list")
        ordered_indices = []
        seen_indices = set()
        for entry in ordered_indices_raw:
            try:
                 if isinstance(entry, int):
                     idx = entry
                 elif isinstance(entry, str) and '#' in entry:
                      idx = int(entry.split('#')[0].strip())
                 else:
                      idx = int(str(entry).strip())
                 if not (0 <= idx < num_abstractions):
                      raise ValueError(f"Invalid index {idx} in ordered list. Max index is {num_abstractions-1}.")
                 if idx in seen_indices:
                     raise ValueError(f"Duplicate index {idx} found in ordered list.")
                 ordered_indices.append(idx)
                 seen_indices.add(idx)
            except (ValueError, TypeError):
                 raise ValueError(f"Could not parse index from ordered list entry: {entry}")
        # Check if all abstractions are included
        if len(ordered_indices) != num_abstractions:
             raise ValueError(f"Ordered list length ({len(ordered_indices)}) does not match number of abstractions ({num_abstractions}). Missing indices: {set(range(num_abstractions)) - seen_indices}")
        print(f"Determined chapter order (indices): {ordered_indices}")
        return ordered_indices # Return the list of indices
    def post(self, shared, prep_res, exec_res):
        # exec_res is already the list of ordered indices
        shared["chapter_order"] = exec_res # List of indices
class WriteChapters(BatchNode):
    def prep(self, shared):
        chapter_order = shared["chapter_order"] # List of indices
        abstractions = shared["abstractions"]   # List of dicts, name/desc potentially translated
        files_data = shared["files"]
        language = shared.get("language", "english") # Get language
        # Get already written chapters to provide context
        # We store them temporarily during the batch run, not in shared memory yet
        # The 'previous_chapters_summary' will be built progressively in the exec context
        self.chapters_written_so_far = [] # Use instance variable for temporary storage across exec calls
        # Create a complete list of all chapters
        all_chapters = []
        chapter_filenames = {} # Store chapter filename mapping for linking
        for i, abstraction_index in enumerate(chapter_order):
            if 0 <= abstraction_index < len(abstractions):
                chapter_num = i + 1
                chapter_name = abstractions[abstraction_index]["name"] # Potentially translated name
                # Create safe filename (from potentially translated name)
                safe_name = "".join(c if c.isalnum() else '_' for c in chapter_name).lower()
                filename = f"{i+1:02d}_{safe_name}.md"
                # Format with link (using potentially translated name)
                all_chapters.append(f"{chapter_num}. [{chapter_name}]({filename})")
                # Store mapping of chapter index to filename for linking
                chapter_filenames[abstraction_index] = {"num": chapter_num, "name": chapter_name, "filename": filename}
        # Create a formatted string with all chapters
        full_chapter_listing = "\n".join(all_chapters)
        items_to_process = []
        for i, abstraction_index in enumerate(chapter_order):
            if 0 <= abstraction_index < len(abstractions):
                abstraction_details = abstractions[abstraction_index] # Contains potentially translated name/desc
                # Use 'files' (list of indices) directly
                related_file_indices = abstraction_details.get("files", [])
                # Get content using helper, passing indices
                related_files_content_map = get_content_for_indices(files_data, related_file_indices)
                # Get previous chapter info for transitions (uses potentially translated name)
                prev_chapter = None
                    prev_idx = chapter_order[i-1]
                    prev_chapter = chapter_filenames[prev_idx]
                # Get next chapter info for transitions (uses potentially translated name)
                next_chapter = None
                if i < len(chapter_order) - 1:
                    next_idx = chapter_order[i+1]
                    next_chapter = chapter_filenames[next_idx]
                items_to_process.append({
                    "chapter_num": i + 1,
                    "abstraction_index": abstraction_index,
                    "abstraction_details": abstraction_details, # Has potentially translated name/desc
                    "related_files_content_map": related_files_content_map,
                    "project_name": shared["project_name"],  # Add project name
                    "full_chapter_listing": full_chapter_listing,  # Add the full chapter listing (uses potentially translated names)
                    "chapter_filenames": chapter_filenames,  # Add chapter filenames mapping (uses potentially translated names)
                    "prev_chapter": prev_chapter,  # Add previous chapter info (uses potentially translated name)
                    "next_chapter": next_chapter,  # Add next chapter info (uses potentially translated name)
                    "language": language,  # Add language for multi-language support
                    # previous_chapters_summary will be added dynamically in exec
            else:
                print(f"Warning: Invalid abstraction index {abstraction_index} in chapter_order. Skipping.")
        print(f"Preparing to write {len(items_to_process)} chapters...")
        return items_to_process # Iterable for BatchNode
    def exec(self, item):
        # This runs for each item prepared above
        abstraction_name = item["abstraction_details"]["name"] # Potentially translated name
        abstraction_description = item["abstraction_details"]["description"] # Potentially translated description
        chapter_num = item["chapter_num"]
        project_name = item.get("project_name")
        language = item.get("language", "english")
        print(f"Writing chapter {chapter_num} for: {abstraction_name} using LLM...")
        # Prepare file context string from the map
        file_context_str = "\n\n".join(
            f"--- File: {idx_path.split('# ')[1] if '# ' in idx_path else idx_path} ---\n{content}"
            for idx_path, content in item["related_files_content_map"].items()
        # Get summary of chapters written *before* this one
        # Use the temporary instance variable
        previous_chapters_summary = "\n---\n".join(self.chapters_written_so_far)
        # Add language instruction and context notes only if not English
        language_instruction = ""
        concept_details_note = ""
        structure_note = ""
        prev_summary_note = ""
        instruction_lang_note = ""
        mermaid_lang_note = ""
        code_comment_note = ""
        link_lang_note = ""
        tone_note = ""
        if language.lower() != "english":
            lang_cap = language.capitalize()
            language_instruction = f"IMPORTANT: Write this ENTIRE tutorial chapter in **{lang_cap}**. Some input context (like concept name, description, chapter list, previous summary) might already be in {lang_cap}, but you MUST translate ALL other generated content including explanations, examples, technical terms, and potentially code comments into {lang_cap}. DO NOT use English anywhere except in code syntax, required proper nouns, or when specified. The entire output MUST be in {lang_cap}.\n\n"
            concept_details_note = f" (Note: Provided in {lang_cap})"
            structure_note = f" (Note: Chapter names might be in {lang_cap})"
            prev_summary_note = f" (Note: This summary might be in {lang_cap})"
            instruction_lang_note = f" (in {lang_cap})"
            mermaid_lang_note = f" (Use {lang_cap} for labels/text if appropriate)"
            code_comment_note = f" (Translate to {lang_cap} if possible, otherwise keep minimal English for clarity)"
            link_lang_note = f" (Use the {lang_cap} chapter title from the structure above)"
            tone_note = f" (appropriate for {lang_cap} readers)"
        prompt = f"""
{language_instruction}Write a very beginner-friendly tutorial chapter (in Markdown format) for the project `{project_name}` about the concept: "{abstraction_name}". This is Chapter {chapter_num}.
Concept Details{concept_details_note}:
- Name: {abstraction_name}
- Description:
{abstraction_description}
Complete Tutorial Structure{structure_note}:
{item["full_chapter_listing"]}
Context from previous chapters{prev_summary_note}:
{previous_chapters_summary if previous_chapters_summary else "This is the first chapter."}
Relevant Code Snippets (Code itself remains unchanged):
{file_context_str if file_context_str else "No specific code snippets provided for this abstraction."}
Instructions for the chapter (Generate content in {language.capitalize()} unless specified otherwise):
- Start with a clear heading (e.g., `# Chapter {chapter_num}: {abstraction_name}`). Use the provided concept name.
- If this is not the first chapter, begin with a brief transition from the previous chapter{instruction_lang_note}, referencing it with a proper Markdown link using its name{link_lang_note}.
- Begin with a high-level motivation explaining what problem this abstraction solves{instruction_lang_note}. Start with a central use case as a concrete example. The whole chapter should guide the reader to understand how to solve this use case. Make it very minimal and friendly to beginners.
- If the abstraction is complex, break it down into key concepts. Explain each concept one-by-one in a very beginner-friendly way{instruction_lang_note}.
- Explain how to use this abstraction to solve the use case{instruction_lang_note}. Give example inputs and outputs for code snippets (if the output isn't values, describe at a high level what will happen{instruction_lang_note}).
- Each code block should be BELOW 20 lines! If longer code blocks are needed, break them down into smaller pieces and walk through them one-by-one. Aggresively simplify the code to make it minimal. Use comments{code_comment_note} to skip non-important implementation details. Each code block should have a beginner friendly explanation right after it{instruction_lang_note}.
- Describe the internal implementation to help understand what's under the hood{instruction_lang_note}. First provide a non-code or code-light walkthrough on what happens step-by-step when the abstraction is called{instruction_lang_note}. It's recommended to use a simple sequenceDiagram with a dummy example - keep it minimal with at most 5 participants to ensure clarity. If participant name has space, use: `participant QP as Query Processing`. {mermaid_lang_note}.
- Then dive deeper into code for the internal implementation with references to files. Provide example code blocks, but make them similarly simple and beginner-friendly. Explain{instruction_lang_note}.
- IMPORTANT: When you need to refer to other core abstractions covered in other chapters, ALWAYS use proper Markdown links like this: [Chapter Title](filename.md). Use the Complete Tutorial Structure above to find the correct filename and the chapter title{link_lang_note}. Translate the surrounding text.
- Use mermaid diagrams to illustrate complex concepts (```mermaid``` format). {mermaid_lang_note}.
- Heavily use analogies and examples throughout{instruction_lang_note} to help beginners understand.
- End the chapter with a brief conclusion that summarizes what was learned{instruction_lang_note} and provides a transition to the next chapter{instruction_lang_note}. If there is a next chapter, use a proper Markdown link: [Next Chapter Title](next_chapter_filename){link_lang_note}.
- Ensure the tone is welcoming and easy for a newcomer to understand{tone_note}.
- Output *only* the Markdown content for this chapter.
Now, directly provide a super beginner-friendly Markdown output (DON'T need ```markdown``` tags):
        chapter_content = call_llm(prompt)
        # Basic validation/cleanup
        actual_heading = f"# Chapter {chapter_num}: {abstraction_name}" # Use potentially translated name
        if not chapter_content.strip().startswith(f"# Chapter {chapter_num}"):
             # Add heading if missing or incorrect, trying to preserve content
             lines = chapter_content.strip().split('\n')
             if lines and lines[0].strip().startswith("#"): # If there's some heading, replace it
                 lines[0] = actual_heading
                 chapter_content = "\n".join(lines)
             else: # Otherwise, prepend it
                 chapter_content = f"{actual_heading}\n\n{chapter_content}"
        # Add the generated content to our temporary list for the next iteration's context
        self.chapters_written_so_far.append(chapter_content)
        return chapter_content # Return the Markdown string (potentially translated)
    def post(self, shared, prep_res, exec_res_list):
        # exec_res_list contains the generated Markdown for each chapter, in order
        shared["chapters"] = exec_res_list
        # Clean up the temporary instance variable
        del self.chapters_written_so_far
        print(f"Finished writing {len(exec_res_list)} chapters.")
class CombineTutorial(Node):
    def prep(self, shared):
        project_name = shared["project_name"]
        output_base_dir = shared.get("output_dir", "output") # Default output dir
        output_path = os.path.join(output_base_dir, project_name)
        repo_url = shared.get("repo_url")  # Get the repository URL
        # language = shared.get("language", "english") # No longer needed for fixed strings
        # Get potentially translated data
        relationships_data = shared["relationships"] # {"summary": str, "details": [{"from": int, "to": int, "label": str}]} -> summary/label potentially translated
        chapter_order = shared["chapter_order"] # indices
        abstractions = shared["abstractions"]   # list of dicts -> name/description potentially translated
        chapters_content = shared["chapters"]   # list of strings -> content potentially translated
        # --- Generate Mermaid Diagram ---
        mermaid_lines = ["flowchart TD"]
        # Add nodes for each abstraction using potentially translated names
        for i, abstr in enumerate(abstractions):
            node_id = f"A{i}"
            # Use potentially translated name, sanitize for Mermaid ID and label
            sanitized_name = abstr['name'].replace('"', '')
            node_label = sanitized_name # Using sanitized name only
            mermaid_lines.append(f'    {node_id}["{node_label}"]') # Node label uses potentially translated name
        # Add edges for relationships using potentially translated labels
        for rel in relationships_data['details']:
            from_node_id = f"A{rel['from']}"
            to_node_id = f"A{rel['to']}"
            # Use potentially translated label, sanitize
            edge_label = rel['label'].replace('"', '').replace('\n', ' ') # Basic sanitization
            max_label_len = 30
            if len(edge_label) > max_label_len:
                edge_label = edge_label[:max_label_len-3] + "..."
            mermaid_lines.append(f'    {from_node_id} -- "{edge_label}" --> {to_node_id}') # Edge label uses potentially translated label
        mermaid_diagram = "\n".join(mermaid_lines)
        # --- End Mermaid ---
        # --- Prepare index.md content ---
        index_content = f"# Tutorial: {project_name}\n\n"
        index_content += f"{relationships_data['summary']}\n\n" # Use the potentially translated summary directly
        # Keep fixed strings in English
        index_content += f"**Source Repository:** [{repo_url}]({repo_url})\n\n"
        # Add Mermaid diagram for relationships (diagram itself uses potentially translated names/labels)
        index_content += "```mermaid\n"
        index_content += mermaid_diagram + "\n"
        index_content += "```\n\n"
        # Keep fixed strings in English
        index_content += f"## Chapters\n\n"
        chapter_files = []
        # Generate chapter links based on the determined order, using potentially translated names
        for i, abstraction_index in enumerate(chapter_order):
            # Ensure index is valid and we have content for it
            if 0 <= abstraction_index < len(abstractions) and i < len(chapters_content):
                abstraction_name = abstractions[abstraction_index]["name"] # Potentially translated name
                # Sanitize potentially translated name for filename
                safe_name = "".join(c if c.isalnum() else '_' for c in abstraction_name).lower()
                filename = f"{i+1:02d}_{safe_name}.md"
                index_content += f"{i+1}. [{abstraction_name}]({filename})\n" # Use potentially translated name in link text
                # Add attribution to chapter content (using English fixed string)
                chapter_content = chapters_content[i] # Potentially translated content
                if not chapter_content.endswith("\n\n"):
                    chapter_content += "\n\n"
                # Keep fixed strings in English
                chapter_content += f"---\n\nGenerated by [AI Codebase Knowledge Builder](https://github.com/The-Pocket/Tutorial-Codebase-Knowledge)"
                # Store filename and corresponding content
                chapter_files.append({"filename": filename, "content": chapter_content})
            else:
                 print(f"Warning: Mismatch between chapter order, abstractions, or content at index {i} (abstraction index {abstraction_index}). Skipping file generation for this entry.")
        # Add attribution to index content (using English fixed string)
        index_content += f"\n\n---\n\nGenerated by [AI Codebase Knowledge Builder](https://github.com/The-Pocket/Tutorial-Codebase-Knowledge)"
        return {
            "output_path": output_path,
            "index_content": index_content,
            "chapter_files": chapter_files # List of {"filename": str, "content": str}
    def exec(self, prep_res):
        output_path = prep_res["output_path"]
        index_content = prep_res["index_content"]
        chapter_files = prep_res["chapter_files"]
        print(f"Combining tutorial into directory: {output_path}")
        # Rely on Node's built-in retry/fallback
        os.makedirs(output_path, exist_ok=True)
        # Write index.md
        index_filepath = os.path.join(output_path, "index.md")
        with open(index_filepath, "w", encoding="utf-8") as f:
            f.write(index_content)
        print(f"  - Wrote {index_filepath}")
        # Write chapter files
        for chapter_info in chapter_files:
            chapter_filepath = os.path.join(output_path, chapter_info["filename"])
            with open(chapter_filepath, "w", encoding="utf-8") as f:
                f.write(chapter_info["content"])
            print(f"  - Wrote {chapter_filepath}")
        return output_path # Return the final path
    def post(self, shared, prep_res, exec_res):
        shared["final_output_dir"] = exec_res # Store the output path
        print(f"\nTutorial generation complete! Files are in: {exec_res}")
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