Social Media Domain Model Analysis

analysis.md

Social Media Domain Model Analysis

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🚨 Missing Relationships (Immediate Issues)

Object	Issue	Fix
rm-post-details	No respondsToQueryIds	Needs a GetPostDetails query
cmd-flag-content	No emitsEventIds	Should emit ContentFlagged
cmd-send-push	No emitsEventIds	Should emit PushNotificationSent
evt-toxic-content-detected	No aggregateId	Should belong to agg-post or new aggregate

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👤 Missing Actors

Actor	Rationale
Guest	Views public content but cannot interact (different permissions than User)
ContentOwner	Could be distinct from User for content lifecycle control (delete own posts vs admin delete)

Note: If User already covers content ownership, no new actor needed—just more explicit commands.

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⚡ Missing Commands (Write Side)

User Commands (act-user)

Command	Target	Events	Rationale
DeletePost	agg-post	PostDeleted	Users delete their own posts
EditPost	agg-post	PostEdited	Users edit their own posts
DeleteComment	agg-comment	CommentDeleted	Users delete their own comments
UnlikePost	agg-post	PostUnliked	Undo like action
ReportContent	agg-post	ContentReported	User-initiated (vs system FlagContent)

Moderator Commands (act-moderator)

Command	Target	Events	Rationale
RemoveContent	agg-post	ContentRemoved	After review, remove flagged content
ApproveContent	agg-post	ContentApproved	After review, mark as safe
BanUser	(new aggregate)	UserBanned	Temporary/permanent user ban

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📅 Missing Events

Event	Aggregate	Rationale
PostDeleted	agg-post	Track post lifecycle
PostEdited	agg-post	Audit trail for edits
CommentDeleted	agg-comment	Track comment lifecycle
PostUnliked	agg-post	Track engagement changes
ContentFlagged	agg-post	Missing from cmd-flag-content
ContentReported	agg-post	User reports
ContentRemoved	agg-post	Moderation action taken
ContentApproved	agg-post	Moderation action taken

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📖 Missing Read Models

Read Model	Consumers	Subscribes To	Query
ModerationQueue	act-moderator	ContentFlagged, ContentReported	GetModerationQueue
UserNotifications	act-user	CommentAdded, PostLiked, ContentRemoved	GetMyNotifications
UserProfile	act-user, act-moderator	PostPublished, PostDeleted	GetUserProfile

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❓ Missing Queries

Query	Returns	Actors	Rationale
GetPostDetails	rm-post-details	act-user, act-moderator	Critical: ReadModel exists but no query!
GetModerationQueue	rm-moderation-queue	act-moderator	Moderators need work queue
GetMyNotifications	rm-user-notifications	act-user	Users check notifications
GetUserProfile	rm-user-profile	act-user, act-moderator	View user's posts
SearchPosts	(new)	act-user	Discovery feature

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🔄 Missing Policies

Policy	Trigger	Action	Rationale
NotifyOnContentRemoval	ContentRemoved	cmd-send-push	Notify user when their content is removed
UserReportEscalationPolicy	ContentReported	cmd-flag-content	Escalate user reports to moderation

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📊 Priority Summary

High Priority (Broken Relationships):

1. Add GetPostDetails query → rm-post-details
2. Add emitsEventIds to cmd-flag-content and cmd-send-push
3. Add aggregateId to evt-toxic-content-detected

Medium Priority (Core User Flows):

1. Add DeletePost, EditPost, DeleteComment commands
2. Add ModerationQueue read model for moderators
3. Add RemoveContent, ApproveContent commands for moderation workflow

Lower Priority (Polish):

1. User notifications system
2. Content reporting (user-initiated)
3. Search functionality