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import { eq, like, sql, and, inArray } from "drizzle-orm";
import type { DrizzleD1Database } from "drizzle-orm/d1";
import * as schema from "../db/schema";
import type { BlogTag, NewBlogTag, NewBlogTagAssignment } from "../db/schema";
import { sanitizeSearchInput } from "../lib/utils";
export type BlogTagFilters = {
search?: string;
};
export class BlogTagsDal {
constructor(private db: DrizzleD1Database<typeof schema>) {}
// ============================================================================
// TAG CRUD
// ============================================================================
async findAll(
filters: BlogTagFilters = {},
offset = 0,
limit = 100,
): Promise<BlogTag[]> {
const conditions = [];
if (filters.search) {
const sanitized = sanitizeSearchInput(filters.search);
conditions.push(like(schema.blogTags.name, `%${sanitized}%`));
}
const query = this.db
.select()
.from(schema.blogTags)
.orderBy(schema.blogTags.name)
.limit(limit)
.offset(offset);
if (conditions.length > 0) {
return query.where(and(...conditions));
}
return query;
}
async count(filters: BlogTagFilters = {}): Promise<number> {
const conditions = [];
if (filters.search) {
const sanitized = sanitizeSearchInput(filters.search);
conditions.push(like(schema.blogTags.name, `%${sanitized}%`));
}
const query = this.db
.select({ count: sql<number>`count(*)` })
.from(schema.blogTags);
const result =
conditions.length > 0
? await query.where(and(...conditions))
: await query;
return result[0]?.count ?? 0;
}
async findById(id: string): Promise<BlogTag | undefined> {
const result = await this.db
.select()
.from(schema.blogTags)
.where(eq(schema.blogTags.id, id))
.limit(1);
return result[0];
}
async findBySlug(slug: string): Promise<BlogTag | undefined> {
const result = await this.db
.select()
.from(schema.blogTags)
.where(eq(schema.blogTags.slug, slug))
.limit(1);
return result[0];
}
async create(data: NewBlogTag): Promise<BlogTag> {
const result = await this.db
.insert(schema.blogTags)
.values(data)
.returning();
return result[0];
}
async update(
id: string,
data: Partial<Omit<BlogTag, "id" | "dateCreated">>,
): Promise<BlogTag | undefined> {
const result = await this.db
.update(schema.blogTags)
.set(data)
.where(eq(schema.blogTags.id, id))
.returning();
return result[0];
}
async delete(id: string): Promise<boolean> {
const result = await this.db
.delete(schema.blogTags)
.where(eq(schema.blogTags.id, id))
.returning();
return result.length > 0;
}
async slugExists(slug: string, excludeId?: string): Promise<boolean> {
const conditions = [eq(schema.blogTags.slug, slug)];
if (excludeId) {
conditions.push(sql`${schema.blogTags.id} != ${excludeId}`);
}
const result = await this.db
.select({ count: sql<number>`count(*)` })
.from(schema.blogTags)
.where(and(...conditions));
return (result[0]?.count ?? 0) > 0;
}
// ============================================================================
// TAG ASSIGNMENTS
// ============================================================================
async findByBlogId(blogId: string): Promise<BlogTag[]> {
const result = await this.db
.select({
id: schema.blogTags.id,
name: schema.blogTags.name,
slug: schema.blogTags.slug,
dateCreated: schema.blogTags.dateCreated,
})
.from(schema.blogTagAssignments)
.innerJoin(
schema.blogTags,
eq(schema.blogTagAssignments.tagId, schema.blogTags.id),
)
.where(eq(schema.blogTagAssignments.blogId, blogId));
return result;
}
/**
* Bulk fetch tags for multiple blogs (N+1 optimization)
* @param blogIds Array of blog IDs
* @returns Map of blogId -> BlogTag[]
*/
async findByBlogIds(blogIds: string[]): Promise<Map<string, BlogTag[]>> {
if (blogIds.length === 0) return new Map();
const result = await this.db
.select({
blogId: schema.blogTagAssignments.blogId,
id: schema.blogTags.id,
name: schema.blogTags.name,
slug: schema.blogTags.slug,
dateCreated: schema.blogTags.dateCreated,
})
.from(schema.blogTagAssignments)
.innerJoin(
schema.blogTags,
eq(schema.blogTagAssignments.tagId, schema.blogTags.id),
)
.where(inArray(schema.blogTagAssignments.blogId, blogIds));
const map = new Map<string, BlogTag[]>();
for (const row of result) {
if (!map.has(row.blogId)) map.set(row.blogId, []);
const tags = map.get(row.blogId);
/* v8 ignore start -- V8 artifact: Map.get always returns value after set */
if (tags) {
/* v8 ignore stop */
tags.push({
id: row.id,
name: row.name,
slug: row.slug,
dateCreated: row.dateCreated,
});
}
}
return map;
}
async addToBlog(data: NewBlogTagAssignment): Promise<void> {
await this.db.insert(schema.blogTagAssignments).values(data);
}
async removeFromBlog(blogId: string, tagId: string): Promise<boolean> {
const result = await this.db
.delete(schema.blogTagAssignments)
.where(
and(
eq(schema.blogTagAssignments.blogId, blogId),
eq(schema.blogTagAssignments.tagId, tagId),
),
)
.returning();
return result.length > 0;
}
async removeAllFromBlog(blogId: string): Promise<void> {
await this.db
.delete(schema.blogTagAssignments)
.where(eq(schema.blogTagAssignments.blogId, blogId));
}
}
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