feat: Handle io.cozy.apps_registry query

On the StackLink side, the `io.cozy.apps_registry` is handled by the
AppsRegistryCollection that queries a specific cozy-stack route when
the `slug` parameter equals `maintenance`

This is a shortcut to query all apps under maintenance

This is problematic because the local Pouch is synchronized on this
doctype and stores all apps with their respective IDs. There is no
`maintenance` document, so we cannot process a query that selects this
ID

To make this possible, we want to persist the `maintenance` query's
result as a single document with the `maintenance` id

packages/cozy-client/src/CozyClient.js

@@ -1086,7 +1086,7 @@ client.query(Q('io.cozy.bills'))`)
   async requestQuery(definition) {
     const mainResponse = await this.chain.request(definition)
 
-    this.persistVirtualDocuments(mainResponse.data)
+    this.persistVirtualDocuments(definition, mainResponse.data)
 
     if (!definition.includes) {
       return mainResponse
@@ -1105,7 +1105,20 @@ client.query(Q('io.cozy.bills'))`)
    * @param {CozyClientDocument | Array<CozyClientDocument>} data - Document or array of documents to be saved
    * @returns {Promise<void>}
    */
-  async persistVirtualDocuments(data) {
+  async persistVirtualDocuments(definition, data) {
+    if (definition.doctype === 'io.cozy.apps_registry') {
+      // io.cozy.apps_registry has a dedicated endpoint on cozy-stack that
+      // returns data different than the one stored in database
+      // We want to store the full answer data under the `maintenance` id
+      // so we can query it from the Pouch the same way we query it from the stack
+      return await this.persistVirtualDocument({
+        _type: 'io.cozy.apps_registry',
+        _id: 'maintenance',
+        // @ts-ignore
+        cozyPouchData: data
+      })
+    }
+
     if (!Array.isArray(data)) {
       await this.persistVirtualDocument(data)
     } else {

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

@@ -22,6 +22,20 @@ export const normalizeDoc = (doc, doctype) => {
 const filterDeletedDocumentsFromRows = doc => !!doc
 
 export const fromPouchResult = (res, withRows, doctype) => {
+  // Sometimes, queries are transformed by Collections and they call a dedicated
+  // cozy-stack route. When this is the case, we want to be able to replicate the same
+  // query from cozy-pouch-link. It is not possible as-is because the received data
+  // is not the same as the one stored in the Couch database
+  // To handle this, we store the received data in the Pouch with a dedicated id and
+  // we store the query result in a `cozyPouchData` attribute
+  // So when `cozyPouchData` attribute exists, we know that we want to return its content
+  // as the result of the query
+  if (res.cozyPouchData) {
+    return {
+      data: res.cozyPouchData
+    }
+  }
+
   if (withRows) {
     const docs = res.rows
       ? res.rows.map(row => row.doc).filter(filterDeletedDocumentsFromRows)