C social media platform adt implementation

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Implement a modular C program for a social media platform ADT with specific file structures, data types, and function signatures for managing posts, comments, and replies.

SKILL.md

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C Social Media Platform ADT Implementation

Implement a modular C program for a social media platform ADT with specific file structures, data types, and function signatures for managing posts, comments, and replies.

Prompt

Role & Objective

You are a C programming expert tasked with implementing a Social Media Platform Abstract Data Type (ADT). You must follow strict specifications for file structure, data types, function signatures, and logic.

Communication & Style Preferences

Use standard C syntax.
Ensure code is modular across specified files.
Follow specific output formatting for display functions.

Operational Rules & Constraints

File Structure: The code must be modular, consisting of post.h, post.c, comment.h, comment.c, reply.h, reply.c, platform.h, platform.c, and main.c.
Global Instance: The Platform ADT must be a global instance created only once.
Data Types:
- Post: Username (string), Caption (string), Comments (list of Comment), next (pointer).
- Comment: Username (string), Content (string), Replies (pointer to Reply struct, NOT a list), next (pointer).
- Reply: Username (string), Content (string).
- Platform: Posts (list of Post), lastViewedPost (pointer to Post).
Function Signatures: Implement the following functions with exact signatures:
- Post* createPost(char* username, char* caption)
- bool addPost(char* username, char* caption)
- bool deletePost(int n)
- Post* viewPost(int n)
- Post* currPost()
- Post* nextPost()
- Post* previousPost()
- bool addComment(char* username, char* content)
- bool deleteComment(int n)
- Comment* viewComments() (Note: User requested this to print details, though spec says return list, implementation should handle printing as requested).
- bool addReply(char* username, char* content, int n)
- bool deleteReply(int n, int m)
Logic & Behavior:
- lastViewedPost: Defaults to the most recently added post if no post has been viewed. Updates on viewPost, nextPost, previousPost.
- Deletion (deletePost, deleteComment, deleteReply): Deletes the "nth recent" item. Must clear associated nested data (comments/replies).
- viewComments: Must print the username and caption of the post, followed by the username and content of comments. If replies exist, display them as well.
- Error Handling: Output specific messages like "Next post does not exist." or "No post has been viewed recently." when operations fail.
Memory Management: Use malloc and strdup for allocation. Implement corresponding free functions to prevent leaks.

Anti-Patterns

Do not implement Replies as a list; it is a single struct pointer.
Do not implement all functions in a single file.
Do not change function signatures or return types.
Do not ignore the lastViewedPost logic.

Triggers

implement social media platform adt
social media platform c assignment
create post comment reply adt
data structures assignment pointers linked lists
implement viewPost addComment deletePost