Feat: Add initial functionality

Author: erodewald

index.js

@@ -0,0 +1,62 @@
+'use strict'
+
+const admin = require('firebase-admin')
+
+module.exports = class FirestoreDBContextStore {
+  constructor(serviceAccount, collectionName) {
+    if (!serviceAccount) {
+      throw new Error('Need a valid serviceAccount.json')
+    }
+
+    this.serviceAccount = serviceAccount
+    this.collectionName = collectionName || 'installedApps'
+
+    admin.initializeApp({
+      credential: admin.credential.cert(this.serviceAccount)
+    })
+    this.db = admin.firestore()
+    this.installedApps = this.db.collection(this.collectionName)
+  }
+
+  get(installedAppId) {
+    return new Promise((resolve, reject) => {
+      this.installedApps
+        .doc(installedAppId)
+        .get()
+        .then(snapshot => {
+          resolve(snapshot.data())
+        })
+        .catch(reject)
+    })
+  }
+
+  put(params) {
+    return new Promise((resolve, reject) => {
+      this.installedApps
+        .doc(params.installedAppId)
+        .set(params, {merge: true})
+        .then(resolve)
+        .catch(reject)
+    })
+  }
+
+  update(installedAppId, params) {
+    return new Promise((resolve, reject) => {
+      this.installedApps
+        .doc(installedAppId)
+        .update(params, {merge: true})
+        .then(resolve)
+        .catch(reject)
+    })
+  }
+
+  delete(installedAppId) {
+    return new Promise((resolve, reject) => {
+      this.installedApps
+        .doc(installedAppId)
+        .delete()
+        .then(resolve)
+        .catch(reject)
+    })
+  }
+}