feat(pouch-link): Allow to inject a Pouch adapter in CozyPouchLink

In previous commit we added a `platform` option into the PouchLink
constructor in order to allow injecting a custom local storage API from
a react-native project

We also want to inject a custom PouchDB adapter as a react-native
project would use a different PouchDB implementation

Like for the local storage API, if no injection is given, then
`pouchdb-browser` adapter will be used by default

packages/cozy-pouch-link/src/PouchManager.js

@@ -1,4 +1,3 @@
-import PouchDB from 'pouchdb-browser'
 import fromPairs from 'lodash/fromPairs'
 import forEach from 'lodash/forEach'
 import get from 'lodash/get'
@@ -41,16 +40,21 @@ class PouchManager {
     this.storage = new PouchLocalStorage(
       options.platform?.storage || platformWeb.storage
     )
+    this.PouchDB = options.platform?.pouchAdapter || platformWeb.pouchAdapter
   }
 
   async init() {
     const pouchPlugins = get(this.options, 'pouch.plugins', [])
     const pouchOptions = get(this.options, 'pouch.options', {})
 
+    forEach(pouchPlugins, plugin => this.PouchDB.plugin(plugin))
     this.pouches = fromPairs(
       this.doctypes.map(doctype => [
         doctype,
-        new PouchDB(getDatabaseName(this.options.prefix, doctype), pouchOptions)
+        new this.PouchDB(
+          getDatabaseName(this.options.prefix, doctype),
+          pouchOptions
+        )
       ])
     )
     this.syncedDoctypes = await this.storage.getPersistedSyncedDoctypes()

packages/cozy-pouch-link/src/platformWeb.js

@@ -1,3 +1,5 @@
+import PouchDB from 'pouchdb-browser'
+
 const storage = {
   getItem: async key => {
     return window.localStorage.getItem(key)
@@ -11,5 +13,6 @@ const storage = {
 }
 
 export const platformWeb = {
-  storage
+  storage,
+  pouchAdapter: PouchDB
 }

packages/cozy-pouch-link/src/types.js

@@ -12,6 +12,7 @@
 /**
  * @typedef {object} PouchLinkPlatform
  * @property {LocalStorage} storage Methods to access local storage
+ * @property {any} pouchAdapter PouchDB class (can be pouchdb-core or pouchdb-browser)
  */
 
 export default {}