add tag imports

src/lib/comic-info.ts

@@ -0,0 +1,72 @@
+import AdmZip from 'adm-zip'
+import { XMLParser } from 'fast-xml-parser'
+import type { ComicInfoData } from '@/types'
+
+const parser = new XMLParser()
+
+function toNumber(val: unknown): number | null {
+  if (val === undefined || val === null || val === '') return null
+  const n = Number(val)
+  return isNaN(n) ? null : n
+}
+
+function toString(val: unknown): string | null {
+  if (val === undefined || val === null || val === '') return null
+  return String(val)
+}
+
+/**
+ * Parse ComicInfo.xml from inside a CBZ archive.
+ * Returns null if the archive doesn't contain ComicInfo.xml or parsing fails.
+ */
+export function parseComicInfo(absoluteCbzPath: string): ComicInfoData | null {
+  let zip: AdmZip
+  try {
+    zip = new AdmZip(absoluteCbzPath)
+  } catch {
+    return null
+  }
+
+  // Find ComicInfo.xml (case-insensitive)
+  const entry = zip.getEntries().find(
+    (e) => !e.isDirectory && e.entryName.toLowerCase() === 'comicinfo.xml'
+  )
+  if (!entry) return null
+
+  let xml: string
+  try {
+    xml = entry.getData().toString('utf-8')
+  } catch {
+    return null
+  }
+
+  let doc: Record<string, unknown>
+  try {
+    doc = parser.parse(xml) as Record<string, unknown>
+  } catch {
+    return null
+  }
+
+  // The root element can be ComicInfo or ComicInfoXml (varies by source)
+  const info = (doc.ComicInfo ?? doc.ComicInfoXml ?? doc.comicinfo) as Record<string, unknown> | undefined
+  if (!info) return null
+
+  // Parse tags: comma-separated string
+  const rawTags = toString(info.Tags)
+  const tags: string[] = rawTags
+    ? rawTags.split(',').map((t) => t.trim()).filter(Boolean)
+    : []
+
+  return {
+    title: toString(info.Title),
+    year: toNumber(info.Year),
+    month: toNumber(info.Month),
+    day: toNumber(info.Day),
+    writer: toString(info.Writer),
+    translator: toString(info.Translator),
+    publisher: toString(info.Publisher),
+    genre: toString(info.Genre),
+    tags,
+    web: toString(info.Web),
+  }
+}

src/lib/comic-metadata.ts

@@ -0,0 +1,203 @@
+import path from 'path'
+import crypto from 'crypto'
+import type { Library, ImportedTag, TagMapping } from '@/types'
+import { getDb } from './db'
+import { resolveLibraryRoot } from './libraries'
+import { parseComicInfo } from './comic-info'
+
+// ─── Metadata Import ──────────────────────────────────────────────────────────
+
+/**
+ * Import ComicInfo.xml metadata for all comic_issue items in a library.
+ * - Populates media_items fields (title, year, genres, metadata JSON).
+ * - For each tag: if a mapping exists, assigns the real tag; otherwise creates
+ *   an imported tag entry.
+ */
+export function importComicMetadata(library: Library): void {
+  const db = getDb()
+  const libraryRoot = resolveLibraryRoot(library)
+
+  const issues = db
+    .prepare(
+      `SELECT item_key, file_path, metadata FROM media_items
+       WHERE library_id = ? AND item_type = 'comic_issue' AND file_path IS NOT NULL`
+    )
+    .all(library.id) as { item_key: string; file_path: string; metadata: string | null }[]
+
+  // Load existing mappings for this library
+  const mappingRows = db
+    .prepare('SELECT imported_tag_name, tag_id FROM tag_mappings WHERE library_id = ?')
+    .all(library.id) as { imported_tag_name: string; tag_id: string }[]
+  const mappings = new Map(mappingRows.map((r) => [r.imported_tag_name, r.tag_id]))
+
+  // Clear existing imported tag associations for this library (they'll be re-created)
+  db.prepare(
+    `DELETE FROM item_imported_tags WHERE imported_tag_id IN (
+       SELECT id FROM imported_tags WHERE library_id = ?
+     )`
+  ).run(library.id)
+  db.prepare('DELETE FROM imported_tags WHERE library_id = ?').run(library.id)
+
+  const updateItem = db.prepare(`
+    UPDATE media_items SET title = @title, year = @year, genres = @genres, metadata = @metadata
+    WHERE item_key = @item_key
+  `)
+  const addMediaTag = db.prepare(
+    'INSERT OR IGNORE INTO media_tags (item_key, tag_id) VALUES (?, ?)'
+  )
+  const upsertImportedTag = db.prepare(`
+    INSERT INTO imported_tags (id, library_id, name) VALUES (@id, @library_id, @name)
+    ON CONFLICT(library_id, name) DO UPDATE SET name = excluded.name
+    RETURNING id
+  `)
+  const addItemImportedTag = db.prepare(
+    'INSERT OR IGNORE INTO item_imported_tags (item_key, imported_tag_id) VALUES (?, ?)'
+  )
+
+  let importedCount = 0
+
+  db.transaction(() => {
+    for (const issue of issues) {
+      const absPath = path.join(libraryRoot, issue.file_path)
+      const info = parseComicInfo(absPath)
+      if (!info) continue
+
+      // Merge with existing metadata JSON (preserve pageCount, coverUrl, etc.)
+      const existingMeta = issue.metadata ? JSON.parse(issue.metadata) : {}
+      const mergedMeta = {
+        ...existingMeta,
+        writer: info.writer,
+        publisher: info.publisher,
+        translator: info.translator,
+        web: info.web,
+        month: info.month,
+        day: info.day,
+      }
+
+      updateItem.run({
+        item_key: issue.item_key,
+        title: info.title ?? existingMeta.title ?? null,
+        year: info.year,
+        genres: info.genre,
+        metadata: JSON.stringify(mergedMeta),
+      })
+
+      // Process tags
+      for (const tagName of info.tags) {
+        const mappedTagId = mappings.get(tagName)
+        if (mappedTagId) {
+          // Mapping exists — assign the real tag
+          addMediaTag.run(issue.item_key, mappedTagId)
+        } else {
+          // No mapping — create imported tag
+          const importedTagId = crypto.randomUUID()
+          const row = upsertImportedTag.get({
+            id: importedTagId,
+            library_id: library.id,
+            name: tagName,
+          }) as { id: string }
+          addItemImportedTag.run(issue.item_key, row.id)
+        }
+      }
+
+      importedCount++
+    }
+  })()
+
+  console.log(`[comic-metadata] Imported metadata for ${importedCount}/${issues.length} issues in "${library.name}"`)
+}
+
+// ─── Imported Tags ────────────────────────────────────────────────────────────
+
+export function getImportedTagsForLibrary(libraryId: string): ImportedTag[] {
+  const db = getDb()
+  return db
+    .prepare(
+      `SELECT it.id, it.library_id as libraryId, it.name,
+              COUNT(iit.item_key) as itemCount
+       FROM imported_tags it
+       LEFT JOIN item_imported_tags iit ON iit.imported_tag_id = it.id
+       WHERE it.library_id = ?
+       GROUP BY it.id
+       ORDER BY it.name`
+    )
+    .all(libraryId) as ImportedTag[]
+}
+
+// ─── Tag Mappings ─────────────────────────────────────────────────────────────
+
+export function getTagMappingsForLibrary(libraryId: string): TagMapping[] {
+  const db = getDb()
+  return db
+    .prepare(
+      `SELECT tm.id, tm.library_id as libraryId, tm.imported_tag_name as importedTagName,
+              tm.tag_id as tagId, t.name as tagName, tc.name as categoryName
+       FROM tag_mappings tm
+       JOIN tags t ON t.id = tm.tag_id
+       JOIN tag_categories tc ON tc.id = t.category_id
+       WHERE tm.library_id = ?
+       ORDER BY tm.imported_tag_name`
+    )
+    .all(libraryId) as TagMapping[]
+}
+
+/**
+ * Create a tag mapping and apply it: assign the real tag to all items that
+ * currently have the imported tag, then remove the imported tag entries.
+ */
+export function createTagMapping(libraryId: string, importedTagName: string, tagId: string): TagMapping {
+  const db = getDb()
+
+  const id = crypto.randomUUID()
+
+  return db.transaction(() => {
+    // Persist the mapping for future scans
+    db.prepare(`
+      INSERT INTO tag_mappings (id, library_id, imported_tag_name, tag_id)
+      VALUES (?, ?, ?, ?)
+      ON CONFLICT(library_id, imported_tag_name) DO UPDATE SET tag_id = excluded.tag_id
+    `).run(id, libraryId, importedTagName, tagId)
+
+    // Find all items that currently have this imported tag
+    const importedTag = db
+      .prepare('SELECT id FROM imported_tags WHERE library_id = ? AND name = ?')
+      .get(libraryId, importedTagName) as { id: string } | undefined
+
+    if (importedTag) {
+      const itemKeys = db
+        .prepare('SELECT item_key FROM item_imported_tags WHERE imported_tag_id = ?')
+        .all(importedTag.id) as { item_key: string }[]
+
+      // Assign the real tag to all affected items
+      const addMediaTag = db.prepare(
+        'INSERT OR IGNORE INTO media_tags (item_key, tag_id) VALUES (?, ?)'
+      )
+      for (const { item_key } of itemKeys) {
+        addMediaTag.run(item_key, tagId)
+      }
+
+      // Remove the imported tag (cascades to item_imported_tags)
+      db.prepare('DELETE FROM imported_tags WHERE id = ?').run(importedTag.id)
+    }
+
+    // Fetch the created mapping with joined names
+    const mapping = db
+      .prepare(
+        `SELECT tm.id, tm.library_id as libraryId, tm.imported_tag_name as importedTagName,
+                tm.tag_id as tagId, t.name as tagName, tc.name as categoryName
+         FROM tag_mappings tm
+         JOIN tags t ON t.id = tm.tag_id
+         JOIN tag_categories tc ON tc.id = t.category_id
+         WHERE tm.library_id = ? AND tm.imported_tag_name = ?`
+      )
+      .get(libraryId, importedTagName) as TagMapping
+
+    return mapping
+  })()
+}
+
+export function deleteTagMapping(id: string): void {
+  const db = getDb()
+  const result = db.prepare('DELETE FROM tag_mappings WHERE id = ?').run(id)
+  if (result.changes === 0) throw new Error('Mapping not found')
+}

src/lib/db.ts

@@ -109,6 +109,7 @@ function initDb(db: Database.Database): void {
   migrateLibraryPermissionsAccessLevel(db)
   migrateLibrariesAddComics(db)
   migrateComicItemTypes(db)
+  migrateImportedTags(db)
   seedAppSettings(db)
 }
 
@@ -421,3 +422,28 @@ function migrateAiJobs(db: Database.Database): void {
     db.exec('ALTER TABLE ai_jobs ADD COLUMN payload TEXT')
   }
 }
+
+function migrateImportedTags(db: Database.Database): void {
+  db.exec(`
+    CREATE TABLE IF NOT EXISTS imported_tags (
+      id         TEXT PRIMARY KEY,
+      library_id TEXT NOT NULL REFERENCES libraries(id) ON DELETE CASCADE,
+      name       TEXT NOT NULL,
+      UNIQUE(library_id, name)
+    );
+
+    CREATE TABLE IF NOT EXISTS item_imported_tags (
+      item_key       TEXT NOT NULL,
+      imported_tag_id TEXT NOT NULL REFERENCES imported_tags(id) ON DELETE CASCADE,
+      PRIMARY KEY (item_key, imported_tag_id)
+    );
+
+    CREATE TABLE IF NOT EXISTS tag_mappings (
+      id                TEXT PRIMARY KEY,
+      library_id        TEXT NOT NULL REFERENCES libraries(id) ON DELETE CASCADE,
+      imported_tag_name TEXT NOT NULL,
+      tag_id            TEXT NOT NULL REFERENCES tags(id) ON DELETE CASCADE,
+      UNIQUE(library_id, imported_tag_name)
+    );
+  `)
+}

src/lib/scanner.ts

@@ -12,6 +12,7 @@ import { getThumbnailPath, getCbzThumbnailPath } from './thumbnails'
 import { computeFingerprint } from './fingerprint'
 import { reKeyMediaItem } from './tags'
 import { runAiTagging } from './ai-tagger'
+import { importComicMetadata } from './comic-metadata'
 
 let scanRunning = false
 
@@ -651,6 +652,13 @@ async function scanComics(library: Library, libraryRoot: string): Promise<void>
   }
 
   console.log(`[scanner]   comics: indexed ${items.filter((i) => 'issues' in i).length} series, ${issueCount} issues`)
+
+  // Import ComicInfo.xml metadata (title, year, genres, tags)
+  try {
+    importComicMetadata(library)
+  } catch (err) {
+    console.error(`[scanner]   Error importing comic metadata for "${library.name}":`, err)
+  }
 }
 
 // ---------------------------------------------------------------------------