[r/boards] initialize board-specific flagging

[salmad3]

Context:

To maintain content quality and enforce community standards within the r/boards realm, a reliable flagging system is necessary. This system should allow designated users to flag posts for review and potential deletion. Initially, only permission-ed users (Owner, Admins, Moderators) will be able to flag. The system should support a configurable threshold for automatic deletion when the flag count is met.

Acceptance Criteria:

• Implements a Flag struct to store flagging details:

  Example

  type Flag struct {
      User  Address // Address of the user who flagged
      Reason string
  }

• Extends the Post struct to include a Flags field to track flags:

  Example

  type Post struct {
      // ... existing fields
      Flags []Flag
  }

• Includes a public FlagPost function that:

  • Checks if the caller has the "flag:post" permission using bp.HasPermission()
  • Adds a Flag entry to the post's Flags field
  • Checks if the flag count reaches the threshold and hides the post if necessary

• Implements a configurable FlagThreshold (initially hardcoded to 1 flag) to determine when a post should be hidden

• Applies the flagging system to both posts (threads) and comments

• Includes error handling for cases where:

  • The user does not have permission to flag
  • The post is unavailable or already hidden

• Accounts for permission checks using bp.HasPermission() instead of bp.WithPermission()

• Includes tests to:

  • Confirm successful flagging by users with appropriate permissions
  • Validate that unauthorized users cannot flag posts
  • Ensure posts are hidden when the flag count meets FlagThreshold
  • Check edge cases, such as duplicate flagging

Notes

Future updates may include:

• A moderation tree view to display the history of moderation actions
• Configuration of the FlagThreshold on a per-board basis
• A system for users to appeal hidden posts

[salmad3]

@x1unix will initiate.

[x1unix]

@salmad3 implemented in: #3451