uploading seed file to firestore db: done

Author: valerisuleo

section_19-project/project/db/actions.js

@@ -0,0 +1,135 @@
+// _____________________________Removing Data_____________________________
+function deleteCollection(db, collectionPath, batchSize) {
+    let collectionRef = db.collection(collectionPath);
+    let query = collectionRef.orderBy('__name__').limit(batchSize);
+
+    return new Promise((resolve, reject) => {
+        deleteQueryBatch(db, query, resolve, reject);
+    });
+}
+
+function deleteQueryBatch(db, query, resolve, reject) {
+    query.get()
+        .then((snapshot) => {
+            // When there are no documents left, we are done
+            if (snapshot.size === 0) {
+                return 0;
+            }
+
+            // Delete documents in a batch
+            let batch = db.batch();
+            snapshot.docs.forEach((doc) => {
+                batch.delete(doc.ref);
+            });
+
+            return batch.commit().then(() => {
+                return snapshot.size;
+            });
+        }).then((numDeleted) => {
+            if (numDeleted === 0) {
+                resolve();
+                return;
+            }
+
+            // Recurse on the next process tick, to avoid
+            // exploding the stack.
+            process.nextTick(() => {
+                deleteQueryBatch(db, query, resolve, reject);
+            });
+        })
+        .catch(reject);
+}
+
+function removeNestedCollection(payload) {
+    const collectionRef = payload.db.collection(payload.collectionPath);
+    let responseWithId = [];
+
+    collectionRef
+        .get()
+        .then((res) => {
+            responseWithId = res.docChanges().map((el) => {
+                return {
+                    ...el.doc.data(),
+                    id: el.doc.id
+                }
+            })
+            return responseWithId;
+        })
+        .finally(() => {
+            const obj = findObjwithNestedCollection(responseWithId, payload);
+            deleteCollection(payload.db, `${payload.collectionPath}/${obj.id}/${payload.nestedCollectionPath}`, 500);
+        })
+}
+
+function findObjwithNestedCollection(array, payload) {
+    return array.find((item) => {
+        return item[payload.targetObj.key] === payload.targetObj.value;
+    });
+}
+
+//  __________________________Inserting Documents__________________________
+
+function createCollection(payload) {
+    payload.collection.forEach((obj, i) => {
+        payload.db.collection(payload.collectionPath)
+            .add(obj)
+            .then((docRef) => {
+                console.log("Document written with ID: ", docRef.id);
+
+                if (payload.nestedCollectionPath) {
+                    createNestedCollection(obj, docRef, i, payload);
+                }
+
+            }).catch((error) => {
+                console.error("Error adding document: ", error);
+            });
+    });
+}
+
+function createNestedCollection(obj, docRef, i, payload) {
+    obj.id = docRef.id;
+    const { id } = payload.collection[payload.nestedCollectionParentIndex];
+    if (i === 0) {
+
+        payload.nestedCollection.forEach((obj) => {
+            payload.db.collection(`${payload.collectionPath}/${id}/${payload.nestedCollectionPath}`)
+                .add(obj)
+                .then(() => {
+                    console.log("sub collection written: ", obj);
+                })
+                .catch((error) => {
+                    console.log('sub collection', error);
+                })
+        })
+    }
+}
+
+
+function populateDB(payload) {
+    const collectionRef = payload.db.collection(payload.collectionPath);
+
+    collectionRef
+        .get()
+        .then((response) => {
+            if (!response.empty) {
+
+                if (payload.nestedCollectionPath) {
+                    removeNestedCollection(payload);
+                }
+
+                deleteCollection(payload.db, payload.collectionPath, 500)
+                    .then(() => {
+                        createCollection(payload);
+                    });
+
+            } else {
+                createCollection(payload);
+            }
+        })
+}
+
+
+module.exports = {
+    populate: populateDB
+}
+

section_19-project/project/db/init-db.js

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+const firebase = require("firebase");
+// Required for side-effects
+require("firebase/firestore");
+
+const firestore = require('./actions');
+const vegetables = require('./vegetables');
+
+// Initialize Cloud Firestore through Firebase
+firebase.initializeApp({
+    apiKey: "AIzaSyCOqWcUyqJnHKxdXlZluXoYoWkpabbTbdA",
+    authDomain: "ng-mosh-project.firebaseapp.com",
+    projectId: "ng-mosh-project",
+});
+
+const db = firebase.firestore();
+
+const coursePayload = {
+    db: db,
+    collection: vegetables.collection,
+    collectionPath: 'vegetables',
+    // nestedCollectionPath: 'lessons',
+    // nestedCollection: vegetables.nestedCollection,
+    // nestedCollectionParentIndex: 0,
+    // targetObj: {
+    //     key: 'url',
+    //     value: 'serverless-angular'
+    // }
+}
+
+firestore.populate(coursePayload);
+
+
+
+
+

section_19-project/project/db/vegetables.js

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+const collection = [
+    {
+        title: 'Pizza Slice',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/1950_01.jpg?raw=1',
+        price: 0.69,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+    {
+        title: 'Italian Style Panini Roll',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/6742_01.jpg?raw=1',
+        price: 0.25,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+    {
+        title: 'French Baguette',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/6817_01.jpg?raw=1',
+        price: 0.69,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+    {
+        title: 'Maple and Pecan',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/119627_01.jpg?raw=1',
+        price: 0.49,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+    {
+        title: 'Double Chocolate Cookie',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/121278_01.jpg?raw=1',
+        price: 0.39,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+    {
+        title: 'All Butter Croisssant',
+        imageUrl: 'https://www.dropbox.com/s/b03fg3pjd8m9e0z/5207811_01.jpg?raw=1',
+        price: 0.37,
+        categories: ['Bread', 'Dairy', 'Fruits', 'Seasoning and Spice', 'Vegetables'],
+        category: 'Bakery'
+    },
+]
+
+const nestedCollection = [
+   
+]
+
+
+
+
+module.exports = {
+    collection,
+    nestedCollection,
+}
+
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