add more apis

src/IndexedDBEngine.js

@@ -46,7 +46,7 @@ export class IndexedDBEngine {
     })
   }
 
-  searchEmojiByPrefix(prefix) {
+  getEmojiBySearchPrefix(prefix) {
     prefix = prefix.toLowerCase()
     return dbPromise(this._db, STORE_EMOJI, MODE_READONLY, (emojiStore, cb) => {
       const range = IDBKeyRange.bound(prefix, prefix + '\uffff', false, true)
@@ -55,4 +55,23 @@ export class IndexedDBEngine {
       }
     })
   }
+
+  getEmojiByShortcode(shortcode) {
+    shortcode = shortcode.toLowerCase()
+    return dbPromise(this._db, STORE_EMOJI, MODE_READONLY, (emojiStore, cb) => {
+      const range = IDBKeyRange.only(shortcode)
+      emojiStore.index(INDEX_TOKENS).getAll(range).onsuccess = e => {
+        // of course, we could add an extra index just for shortcodes, but it seems
+        // simpler to just re-use the existing tokens index and filter in-memory
+        const results = e.target.result.filter(emoji => emoji.shortcodes.includes(shortcode))
+        cb(results[0])
+      }
+    })
+  }
+
+  getEmojiByUnicode(unicode) {
+    return dbPromise(this._db, STORE_EMOJI, MODE_READONLY, (emojiStore, cb) => {
+      emojiStore.get(unicode).onsuccess = e => cb(e.target.result)
+    })
+  }
 }

src/database.js

@@ -0,0 +1,50 @@
+import { IndexedDBEngine } from './IndexedDBEngine'
+
+let idbEngine
+
+function verifyNonEmptyString(str) {
+  if (typeof str !== 'string' || !str) {
+    throw new Error('expected a non-empty string, got: ' + str)
+  }
+}
+
+async function init () {
+  if (!idbEngine) {
+    idbEngine = new IndexedDBEngine()
+    await idbEngine.readyPromise
+  }
+}
+
+export async function loadData (emojiBaseData) {
+  if (!emojiBaseData || !Array.isArray(emojiBaseData)) {
+    throw new Error('Expected emojibase data, got: ' + emojiBaseData)
+  }
+  await init()
+  await idbEngine.loadData(emojiBaseData)
+}
+
+export async function getEmojiByGroup (group) {
+  if (typeof group !== 'number') {
+    throw new Error('group must be a number, got: ' + group)
+  }
+  await init()
+  return idbEngine.getEmojiByGroup(group)
+}
+
+export async function getEmojiBySearchPrefix (prefix) {
+  verifyNonEmptyString(prefix)
+  await init()
+  return idbEngine.getEmojiBySearchPrefix(prefix)
+}
+
+export async function getEmojiByShortcode (shortcode) {
+  verifyNonEmptyString(shortcode)
+  await init()
+  return idbEngine.getEmojiByShortcode(shortcode)
+}
+
+export async function getEmojiByUnicode (unicode) {
+  verifyNonEmptyString(unicode)
+  await init()
+  return idbEngine.getEmojiByUnicode(unicode)
+}

src/index.js

@@ -1,7 +1 @@
-import { loadData, getEmojiByGroup, searchEmojiByPrefix } from './loadData'
-
-export {
-  loadData,
-  getEmojiByGroup,
-  searchEmojiByPrefix
-}
+export * from './database'

src/loadData.js

@@ -1,31 +0,0 @@
-import { IndexedDBEngine } from './IndexedDBEngine'
-
-let idbEngine
-
-async function init () {
-  if (!idbEngine) {
-    idbEngine = new IndexedDBEngine()
-    await idbEngine.readyPromise
-  }
-}
-
-export async function loadData (emojiBaseData) {
-  await init()
-  await idbEngine.loadData(emojiBaseData)
-}
-
-export async function getEmojiByGroup (group) {
-  if (typeof group !== 'number') {
-    throw new Error('group must be a number, got: ' + group)
-  }
-  await init()
-  return idbEngine.getEmojiByGroup(group)
-}
-
-export async function searchEmojiByPrefix (prefix) {
-  if (typeof prefix !== 'string' || !prefix) {
-    throw new Error('expected a non-empty string, got: ' + prefix)
-  }
-  await init()
-  return idbEngine.searchEmojiByPrefix(prefix)
-}