From 1484a882b290f5fb7a083fbccdebd0190c63929c Mon Sep 17 00:00:00 2001
From: Kara Hoagland <khoaglan@ucsd.edu>
Date: Sun, 27 Nov 2022 15:48:00 -0800
Subject: [PATCH] tag storage

---
 source/assets/scripts/ReviewDetails.js | 25 ++++++++++++--
 source/assets/scripts/localStorage.js  | 45 ++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 2 deletions(-)

diff --git a/source/assets/scripts/ReviewDetails.js b/source/assets/scripts/ReviewDetails.js
index 7c4b109..2fa27a0 100644
--- a/source/assets/scripts/ReviewDetails.js
+++ b/source/assets/scripts/ReviewDetails.js
@@ -1,5 +1,5 @@
 //reviewDetails.js
-import {deleteReviewFromStorage, getReviewFromStorage, updateReviewToStorage} from "./localStorage.js";
+import {addTagsToStorage, deleteReviewFromStorage, deleteTagsFromStorage, getReviewFromStorage, updateReviewToStorage} from "./localStorage.js";
 
 // Run the init() function when the page has loaded
 window.addEventListener("DOMContentLoaded", init);
@@ -10,6 +10,9 @@ function init(){
 	setupUpdate();
 }
 
+/**
+ * Populates the relevant data to the details from local storage review
+ */
 function setupInfo(){
 	let currID = JSON.parse(sessionStorage.getItem("currID"));
 	let currReview = getReviewFromStorage(currID);
@@ -51,6 +54,9 @@ function setupInfo(){
 	}
 }
 
+/**
+ * Sets up delete button to delete review from storage and switch to homepage
+ */
 function setupDelete(){
 	let deleteBtn = document.getElementById("delete-btn");
 	let currID = JSON.parse(sessionStorage.getItem("currID"));
@@ -63,6 +69,9 @@ function setupDelete(){
 	});
 }
 
+/**
+ * Sets up update button to reveal form and update info in storage and the current page 
+ */
 function setupUpdate(){
 	let updateBtn = document.getElementById("update-btn");
 	let currID = JSON.parse(sessionStorage.getItem("currID"));
@@ -141,10 +150,11 @@ function setupUpdate(){
 		form.addEventListener("submit", function(){
 			/*
 			*  User submits the form for their review.
-			*  We create reviewCard and put in storage
+			*  We create reviewCard data, replace in storage, and update tags
 			*/
 			let formData = new FormData(form);
 			let newData = {};
+			//iterate through formData and add to newData
 			for (let [key, value] of formData) {
 				console.log(`${key}`);
 				console.log(`${value}`);
@@ -169,12 +179,23 @@ function setupUpdate(){
 
 			newData["reviewID"] = currID;
 
+			//Get diff of tags and update storage
+			//Note: we can either get the difference twice or keep track when we delete and add
+			//if keep track also need to make sure that a tag doesn't end up on both list
+			let deletedTags = currReview["tags"].filter(x => !newData["tags"].includes(x));
+			let addedTags = newData["tags"].filter(x => !currReview["tags"].includes(x));
+
+			deleteTagsFromStorage(currID, deletedTags);
+			addTagsToStorage(currID, addedTags);
+
 			updateReviewToStorage(currID, newData);
 
 			updateDiv.classList.add("hidden");
 
 		});
 
+		//adding tag to form functionality
+		//TODO: disable duplicate tags (use set?)
 		let tagAddBtn = document.getElementById("tag-add-btn");
 		tagAddBtn.addEventListener("click", ()=> {
 			let tagField = document.getElementById("tag-form");
diff --git a/source/assets/scripts/localStorage.js b/source/assets/scripts/localStorage.js
index cab6447..35b95c6 100644
--- a/source/assets/scripts/localStorage.js
+++ b/source/assets/scripts/localStorage.js
@@ -10,6 +10,9 @@ export function newReviewToStorage(review){
 
 	// set the review entry to the review object
 	localStorage.setItem(`review${nextReviewId}`, JSON.stringify(review));
+
+	// adding to the tag keys
+	addTagsToStorage(nextReviewId, review["tags"]);
 	
 	//updating our activeIDS list
 	let tempIdArr = JSON.parse(localStorage.getItem("activeIDS"));
@@ -52,6 +55,9 @@ export function deleteReviewFromStorage(ID){
 		if (activeIDS[i] == ID) {
 			activeIDS.splice(i,1);
 			localStorage.setItem("activeIDS", JSON.stringify(activeIDS));
+			//get review to delete all the tags(may wanna just add ID to a different list that will delete review and tag list in background)(also don't wanna linear search)
+			let currReview = JSON.parse(localStorage.getItem(`review${ID}`));
+			deleteTagsFromStorage(ID, currReview["tags"]);
 			localStorage.removeItem(`review${ID}`);
 			return;
 		}
@@ -60,6 +66,45 @@ export function deleteReviewFromStorage(ID){
 	console.error(`could not find review${ID} in localStorage`);
 }
 
+/**
+ * Delete ID from the specified tags' storage
+ * @param {string} ID to delete from lists
+ * @param {string[]} deletedTags to modify storage of
+ */
+export function deleteTagsFromStorage(ID, deletedTags) {
+	for(let i in deletedTags){
+		//get local storage of each tag and remove id from tag list
+		let tagArr = JSON.parse(localStorage.getItem("!"+ deletedTags[i]));
+		for(let j in tagArr){
+			if(tagArr[j] == ID){
+				tagArr.splice(j,1);
+			}
+			break;
+		}
+		if(tagArr.length != 0){
+			localStorage.setItem("!" + deletedTags[i], JSON.stringify(tagArr));
+		} else {
+			localStorage.removeItem("!" + deletedTags[i]);
+		}
+	}
+}
+
+/**
+ * Add ID from the specified tags' storage
+ * @param {string} ID to add to lists
+ * @param {string[]} addedTags to modify storage of
+ */
+export function addTagsToStorage(ID, addedTags) {
+	for(let i in addedTags){
+		let tagArr = JSON.parse(localStorage.getItem("!" + addedTags[i]));
+		if(!tagArr){
+			tagArr = [];
+		}
+		tagArr.push(ID);
+		localStorage.setItem("!" + addedTags[i], JSON.stringify(tagArr));
+	}
+}
+
 // legacy function
 export function getAllReviewsFromStorage() {
 	if (!(localStorage.getItem("activeIDS"))) {