[feat] add kei backup

src/ts/kei/backup.ts

@@ -0,0 +1,100 @@
+import { get } from "svelte/store"
+import { alertNormal, alertSelect } from "../alert"
+import { keiServerURL } from "./kei"
+import { DataBase, setDatabase } from "../storage/database"
+
+export async function autoServerBackup(){
+    const db = get(DataBase)
+    const res = await fetch(keiServerURL() + '/autobackup/list', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/json'
+        },
+        body: JSON.stringify({
+            token: db.account.token
+        })
+    })
+    if(res.status === 200){
+        const json = await res.json()
+        if(json.activated){
+            alertNormal("Auto backup is now activated in your account. Now it would backup automaticly, and you can now restore your data from the backup server.")
+            db.account.kei = true
+            return
+        }
+        const backups:[string,string][] = json.backups
+        let pointer = 0
+        while(true){
+            const slices = backups.slice(pointer, pointer + 5)
+            const menu = slices.map((backup) => backup[0])
+            menu.push("Next")
+            menu.push("Previous")
+            menu.push("Cancel")
+            const selectIndex = parseInt(await alertSelect(menu))
+            const selected = menu[selectIndex]
+            if(selected === "Cancel"){
+                break
+            }
+            else if(selected === "Next"){
+                pointer += 5
+                if(pointer >= backups.length){
+                    pointer = 0
+                }
+            }
+            else if(selected === "Previous"){
+                pointer -= 5
+                if(pointer < 0){
+                    pointer = Math.floor(backups.length / 5) * 5
+                }
+            }
+            else{
+                const backup = backups.find((backup) => backup[0] === selected)
+                if(backup){
+                    const res = await fetch(keiServerURL() + '/autobackup/restore', {
+                        method: 'POST',
+                        headers: {
+                            'Content-Type': 'application/json'
+                        },
+                        body: JSON.stringify({
+                            token: db.account.token,
+                            backup: backup[1]
+                        })
+                    })
+                    if(res.status === 200){
+                        setDatabase(await res.json())
+                        alertNormal("Successfully restored!")
+                    }
+                    else{
+                        alertNormal("Error: " + res.text())
+                    }
+                }
+            }
+        }
+    }
+    else if(res.status === 401){
+        alertNormal("You need to activate Risu-Kei in your account, or host your Risu-Kei server from github to use this feature.")
+    }
+    else{
+        alertNormal("Error: " + res.text())
+    }
+}
+
+let lastKeiSave = 0
+export async function saveDbKei() {
+    let db = get(DataBase)
+    if(db.account.kei){
+        if(Date.now() - lastKeiSave < 60000 * 5){
+            return
+        }
+        lastKeiSave = Date.now()
+        fetch(keiServerURL() + '/autobackup/save', {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json'
+            },
+            body: JSON.stringify({
+                token: db.account.token,
+                database: db
+            })
+        })
+    }
+}

src/ts/kei/kei.ts

@@ -0,0 +1,9 @@
+import { get } from "svelte/store";
+import { hubURL } from "../characterCards";
+import { DataBase } from "../storage/database";
+
+export function keiServerURL(){
+    const db = get(DataBase)
+    if(db.keiServerURL) return db.keiServerURL;
+    return hubURL + "/kei";
+}