commit 5279d61998447b4c2a4d741cad2a78d1198a591e · bretton.dev/coves

+354
internal/db/postgres/comment_repo.go
···

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       package postgres

     

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       import (

     

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       	"Coves/internal/core/comments"

     

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       	"context"

     

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       	"database/sql"

     

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       	"fmt"

     

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       	"log"

     

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       	"strings"

     

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       +
       

     

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       	"github.com/lib/pq"

     

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       )

     

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       type postgresCommentRepo struct {

     

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       	db *sql.DB

     

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       }

     

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       // NewCommentRepository creates a new PostgreSQL comment repository

     

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       func NewCommentRepository(db *sql.DB) comments.Repository {

     

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       	return &postgresCommentRepo{db: db}

     

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       }

     

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       // Create inserts a new comment into the comments table

     

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       // Called by Jetstream consumer after comment is created on PDS

     

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       // Idempotent: Returns success if comment already exists (for Jetstream replays)

     

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       func (r *postgresCommentRepo) Create(ctx context.Context, comment *comments.Comment) error {

     

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       	query := `

     

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       		INSERT INTO comments (

     

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       			uri, cid, rkey, commenter_did,

     

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       			root_uri, root_cid, parent_uri, parent_cid,

     

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       			content, content_facets, embed, content_labels, langs,

     

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       			created_at, indexed_at

     

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       		) VALUES (

     

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       			$1, $2, $3, $4,

     

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       			$5, $6, $7, $8,

     

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       			$9, $10, $11, $12, $13,

     

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       			$14, NOW()

     

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       		)

     

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       		ON CONFLICT (uri) DO NOTHING

     

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       		RETURNING id, indexed_at

     

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       	`

     

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       	err := r.db.QueryRowContext(

     

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       		ctx, query,

     

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       		comment.URI, comment.CID, comment.RKey, comment.CommenterDID,

     

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       		comment.RootURI, comment.RootCID, comment.ParentURI, comment.ParentCID,

     

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       		comment.Content, comment.ContentFacets, comment.Embed, comment.ContentLabels, pq.Array(comment.Langs),

     

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       		comment.CreatedAt,

     

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       	).Scan(&comment.ID, &comment.IndexedAt)

     

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       	// ON CONFLICT DO NOTHING returns no rows if duplicate - this is OK (idempotent)

     

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       	if err == sql.ErrNoRows {

     

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       		return nil // Comment already exists, no error for idempotency

     

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       	}

     

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       	if err != nil {

     

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       		// Check for unique constraint violation

     

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       		if strings.Contains(err.Error(), "duplicate key") {

     

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       			return comments.ErrCommentAlreadyExists

     

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       		}

     

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       		return fmt.Errorf("failed to insert comment: %w", err)

     

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       	}

     

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       	return nil

     

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       }

     

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       // Update modifies an existing comment's content fields

     

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       // Called by Jetstream consumer after comment is updated on PDS

     

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       // Preserves vote counts and created_at timestamp

     

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       func (r *postgresCommentRepo) Update(ctx context.Context, comment *comments.Comment) error {

     

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       	query := `

     

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       		UPDATE comments

     

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       		SET

     

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       			cid = $1,

     

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       			content = $2,

     

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       			content_facets = $3,

     

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       			embed = $4,

     

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       			content_labels = $5,

     

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       			langs = $6

     

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       		WHERE uri = $7 AND deleted_at IS NULL

     

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       		RETURNING id, indexed_at, created_at, upvote_count, downvote_count, score, reply_count

     

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       	`

     

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       	err := r.db.QueryRowContext(

     

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       		ctx, query,

     

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       		comment.CID,

     

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       		comment.Content,

     

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       		comment.ContentFacets,

     

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       		comment.Embed,

     

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       		comment.ContentLabels,

     

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       		pq.Array(comment.Langs),

     

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       		comment.URI,

     

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       	).Scan(

     

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       		&comment.ID,

     

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       		&comment.IndexedAt,

     

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       		&comment.CreatedAt,

     

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       		&comment.UpvoteCount,

     

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       		&comment.DownvoteCount,

     

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       		&comment.Score,

     

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       		&comment.ReplyCount,

     

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       	)

     

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       	if err == sql.ErrNoRows {

     

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       		return comments.ErrCommentNotFound

     

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       	}

     

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       	if err != nil {

     

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       		return fmt.Errorf("failed to update comment: %w", err)

     

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       	}

     

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       	return nil

     

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       }

     

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       // GetByURI retrieves a comment by its AT-URI

     

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       // Used by Jetstream consumer for UPDATE/DELETE operations

     

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       func (r *postgresCommentRepo) GetByURI(ctx context.Context, uri string) (*comments.Comment, error) {

     

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       	query := `

     

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       		SELECT

     

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       			id, uri, cid, rkey, commenter_did,

     

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       			root_uri, root_cid, parent_uri, parent_cid,

     

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       			content, content_facets, embed, content_labels, langs,

     

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       			created_at, indexed_at, deleted_at,

     

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       			upvote_count, downvote_count, score, reply_count

     

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       		FROM comments

     

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       		WHERE uri = $1

     

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       	`

     

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       	var comment comments.Comment

     

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       	var langs pq.StringArray

     

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       	err := r.db.QueryRowContext(ctx, query, uri).Scan(

     

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       		&comment.ID, &comment.URI, &comment.CID, &comment.RKey, &comment.CommenterDID,

     

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       		&comment.RootURI, &comment.RootCID, &comment.ParentURI, &comment.ParentCID,

     

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       		&comment.Content, &comment.ContentFacets, &comment.Embed, &comment.ContentLabels, &langs,

     

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       		&comment.CreatedAt, &comment.IndexedAt, &comment.DeletedAt,

     

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       		&comment.UpvoteCount, &comment.DownvoteCount, &comment.Score, &comment.ReplyCount,

     

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       	)

     

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       	if err == sql.ErrNoRows {

     

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       		return nil, comments.ErrCommentNotFound

     

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       	}

     

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       	if err != nil {

     

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       		return nil, fmt.Errorf("failed to get comment by URI: %w", err)

     

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       	}

     

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       	comment.Langs = langs

     

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       	return &comment, nil

     

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       }

     

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       // Delete soft-deletes a comment (sets deleted_at)

     

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       // Called by Jetstream consumer after comment is deleted from PDS

     

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       // Idempotent: Returns success if comment already deleted

     

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       func (r *postgresCommentRepo) Delete(ctx context.Context, uri string) error {

     

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       	query := `

     

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       		UPDATE comments

     

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       		SET deleted_at = NOW()

     

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       		WHERE uri = $1 AND deleted_at IS NULL

     

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       	`

     

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       	result, err := r.db.ExecContext(ctx, query, uri)

     

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       	if err != nil {

     

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       		return fmt.Errorf("failed to delete comment: %w", err)

     

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       	}

     

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       	rowsAffected, err := result.RowsAffected()

     

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       	if err != nil {

     

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       		return fmt.Errorf("failed to check delete result: %w", err)

     

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       	}

     

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       	// Idempotent: If no rows affected, comment already deleted (OK for Jetstream replays)

     

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       	if rowsAffected == 0 {

     

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       		return nil

     

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       	}

     

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       	return nil

     

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       }

     

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       // ListByRoot retrieves all active comments in a thread (flat)

     

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       // Used for fetching entire comment threads on posts

     

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       func (r *postgresCommentRepo) ListByRoot(ctx context.Context, rootURI string, limit, offset int) ([]*comments.Comment, error) {

     

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       	query := `

     

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       		SELECT

     

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       			id, uri, cid, rkey, commenter_did,

     

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       			root_uri, root_cid, parent_uri, parent_cid,

     

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       			content, content_facets, embed, content_labels, langs,

     

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       			created_at, indexed_at, deleted_at,

     

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       			upvote_count, downvote_count, score, reply_count

     

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       		FROM comments

     

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       		WHERE root_uri = $1 AND deleted_at IS NULL

     

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       		ORDER BY created_at ASC

     

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       		LIMIT $2 OFFSET $3

     

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       	`

     

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       	rows, err := r.db.QueryContext(ctx, query, rootURI, limit, offset)

     

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       	if err != nil {

     

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       		return nil, fmt.Errorf("failed to list comments by root: %w", err)

     

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       	}

     

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       	defer func() {

     

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       		if err := rows.Close(); err != nil {

     

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       			log.Printf("Failed to close rows: %v", err)

     

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       		}

     

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       	}()

     

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       	var result []*comments.Comment

     

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       	for rows.Next() {

     

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       		var comment comments.Comment

     

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       		var langs pq.StringArray

     

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       		err := rows.Scan(

     

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       			&comment.ID, &comment.URI, &comment.CID, &comment.RKey, &comment.CommenterDID,

     

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       			&comment.RootURI, &comment.RootCID, &comment.ParentURI, &comment.ParentCID,

     

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       			&comment.Content, &comment.ContentFacets, &comment.Embed, &comment.ContentLabels, &langs,

     

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       			&comment.CreatedAt, &comment.IndexedAt, &comment.DeletedAt,

     

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       			&comment.UpvoteCount, &comment.DownvoteCount, &comment.Score, &comment.ReplyCount,

     

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       		)

     

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       		if err != nil {

     

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       			return nil, fmt.Errorf("failed to scan comment: %w", err)

     

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       		}

     

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       		comment.Langs = langs

     

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       		result = append(result, &comment)

     

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       	}

     

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       	if err = rows.Err(); err != nil {

     

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       		return nil, fmt.Errorf("error iterating comments: %w", err)

     

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       	}

     

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       	return result, nil

     

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       }

     

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       // ListByParent retrieves direct replies to a post or comment

     

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       // Used for building nested/threaded comment views

     

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       func (r *postgresCommentRepo) ListByParent(ctx context.Context, parentURI string, limit, offset int) ([]*comments.Comment, error) {

     

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       	query := `

     

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       		SELECT

     

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       			id, uri, cid, rkey, commenter_did,

     

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       			root_uri, root_cid, parent_uri, parent_cid,

     

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       			content, content_facets, embed, content_labels, langs,

     

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       			created_at, indexed_at, deleted_at,

     

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       			upvote_count, downvote_count, score, reply_count

     

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       		FROM comments

     

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       		WHERE parent_uri = $1 AND deleted_at IS NULL

     

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       		ORDER BY created_at ASC

     

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       		LIMIT $2 OFFSET $3

     

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       	`

     

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       	rows, err := r.db.QueryContext(ctx, query, parentURI, limit, offset)

     

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       	if err != nil {

     

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       		return nil, fmt.Errorf("failed to list comments by parent: %w", err)

     

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       	}

     

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       	defer func() {

     

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       		if err := rows.Close(); err != nil {

     

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       			log.Printf("Failed to close rows: %v", err)

     

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       		}

     

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       	}()

     

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       +
       

     

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       	var result []*comments.Comment

     

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       	for rows.Next() {

     

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       		var comment comments.Comment

     

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       		var langs pq.StringArray

     

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       +
       

     

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       		err := rows.Scan(

     

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       			&comment.ID, &comment.URI, &comment.CID, &comment.RKey, &comment.CommenterDID,

     

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       			&comment.RootURI, &comment.RootCID, &comment.ParentURI, &comment.ParentCID,

     

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       			&comment.Content, &comment.ContentFacets, &comment.Embed, &comment.ContentLabels, &langs,

     

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       			&comment.CreatedAt, &comment.IndexedAt, &comment.DeletedAt,

     

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       			&comment.UpvoteCount, &comment.DownvoteCount, &comment.Score, &comment.ReplyCount,

     

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       		)

     

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       		if err != nil {

     

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       			return nil, fmt.Errorf("failed to scan comment: %w", err)

     

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       		}

     

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       +
       

     

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       		comment.Langs = langs

     

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       		result = append(result, &comment)

     

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       +
       	}

     

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       +
       

     

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       	if err = rows.Err(); err != nil {

     

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       		return nil, fmt.Errorf("error iterating comments: %w", err)

     

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       	}

     

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       +
       

     

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       	return result, nil

     

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       +
       }

     

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       +
       

     

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       // CountByParent counts direct replies to a post or comment

     

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       // Used for showing reply counts in threading UI

     

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       func (r *postgresCommentRepo) CountByParent(ctx context.Context, parentURI string) (int, error) {

     

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       	query := `

     

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       		SELECT COUNT(*)

     

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       		FROM comments

     

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       		WHERE parent_uri = $1 AND deleted_at IS NULL

     

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       	`

     

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       +
       

     

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       	var count int

     

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       	err := r.db.QueryRowContext(ctx, query, parentURI).Scan(&count)

     

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       	if err != nil {

     

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       		return 0, fmt.Errorf("failed to count comments by parent: %w", err)

     

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       	}

     

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       +
       

     

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       	return count, nil

     

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       }

     

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       +
       

     

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       // ListByCommenter retrieves all active comments by a specific user

     

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       // Future: Used for user comment history

     

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       func (r *postgresCommentRepo) ListByCommenter(ctx context.Context, commenterDID string, limit, offset int) ([]*comments.Comment, error) {

     

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       	query := `

     

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       		SELECT

     

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       			id, uri, cid, rkey, commenter_did,

     

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       +
       			root_uri, root_cid, parent_uri, parent_cid,

     

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       			content, content_facets, embed, content_labels, langs,

     

       311
       311
       +
       			created_at, indexed_at, deleted_at,

     

       312
       312
       +
       			upvote_count, downvote_count, score, reply_count

     

       313
       313
       +
       		FROM comments

     

       314
       314
       +
       		WHERE commenter_did = $1 AND deleted_at IS NULL

     

       315
       315
       +
       		ORDER BY created_at DESC

     

       316
       316
       +
       		LIMIT $2 OFFSET $3

     

       317
       317
       +
       	`

     

       318
       318
       +
       

     

       319
       319
       +
       	rows, err := r.db.QueryContext(ctx, query, commenterDID, limit, offset)

     

       320
       320
       +
       	if err != nil {

     

       321
       321
       +
       		return nil, fmt.Errorf("failed to list comments by commenter: %w", err)

     

       322
       322
       +
       	}

     

       323
       323
       +
       	defer func() {

     

       324
       324
       +
       		if err := rows.Close(); err != nil {

     

       325
       325
       +
       			log.Printf("Failed to close rows: %v", err)

     

       326
       326
       +
       		}

     

       327
       327
       +
       	}()

     

       328
       328
       +
       

     

       329
       329
       +
       	var result []*comments.Comment

     

       330
       330
       +
       	for rows.Next() {

     

       331
       331
       +
       		var comment comments.Comment

     

       332
       332
       +
       		var langs pq.StringArray

     

       333
       333
       +
       

     

       334
       334
       +
       		err := rows.Scan(

     

       335
       335
       +
       			&comment.ID, &comment.URI, &comment.CID, &comment.RKey, &comment.CommenterDID,

     

       336
       336
       +
       			&comment.RootURI, &comment.RootCID, &comment.ParentURI, &comment.ParentCID,

     

       337
       337
       +
       			&comment.Content, &comment.ContentFacets, &comment.Embed, &comment.ContentLabels, &langs,

     

       338
       338
       +
       			&comment.CreatedAt, &comment.IndexedAt, &comment.DeletedAt,

     

       339
       339
       +
       			&comment.UpvoteCount, &comment.DownvoteCount, &comment.Score, &comment.ReplyCount,

     

       340
       340
       +
       		)

     

       341
       341
       +
       		if err != nil {

     

       342
       342
       +
       			return nil, fmt.Errorf("failed to scan comment: %w", err)

     

       343
       343
       +
       		}

     

       344
       344
       +
       

     

       345
       345
       +
       		comment.Langs = langs

     

       346
       346
       +
       		result = append(result, &comment)

     

       347
       347
       +
       	}

     

       348
       348
       +
       

     

       349
       349
       +
       	if err = rows.Err(); err != nil {

     

       350
       350
       +
       		return nil, fmt.Errorf("error iterating comments: %w", err)

     

       351
       351
       +
       	}

     

       352
       352
       +
       

     

       353
       353
       +
       	return result, nil

     

       354
       354
       +
       }