22 lines
5.1 KiB
JavaScript
22 lines
5.1 KiB
JavaScript
import express from 'express';
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import fs from 'node:fs/promises';
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import path from 'node:path';
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import crypto from 'node:crypto';
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import { fileURLToPath } from 'node:url';
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const __filename=fileURLToPath(import.meta.url); const __dirname=path.dirname(__filename); const app=express();
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const port=Number(process.env.PORT||3000); const dataFile=process.env.DATA_FILE||'/app/data/finance.json'; const dataDir=path.dirname(dataFile); const backupFile=`${dataFile}.bak`;
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const validIntervals=new Set(['monthly','quarterly','semiannual','yearly']);
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const emptyData=()=>({version:3,settings:{includePeriodicInBalance:true},accounts:[],incomes:[],expenses:[],transfers:[]});
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const isFiniteNumber=value=>typeof value==='number'&&Number.isFinite(value);
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function normalizeMovement(item={}) { return { ...item, interval: validIntervals.has(item.interval)?item.interval:'monthly', dueMonth: item.interval && item.interval!=='monthly' && Number.isInteger(Number(item.dueMonth)) ? Number(item.dueMonth) : null }; }
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function normalizeData(input){if(!input||typeof input!=='object')return input;return {version:3,settings:{includePeriodicInBalance:input.settings?.includePeriodicInBalance!==false},accounts:Array.isArray(input.accounts)?input.accounts.map(({id,name})=>({id,name})):input.accounts,incomes:Array.isArray(input.incomes)?input.incomes.map(normalizeMovement):input.incomes,expenses:Array.isArray(input.expenses)?input.expenses.map(normalizeMovement):input.expenses,transfers:Array.isArray(input.transfers)?input.transfers.map(normalizeMovement):input.transfers};}
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function validateMovement(item){if(!item.id||typeof item.id!=='string')throw new Error('Eintrag ohne gültige ID.');if(!item.name||typeof item.name!=='string')throw new Error('Eintrag ohne Namen.');if(!isFiniteNumber(item.amount)||item.amount<0)throw new Error(`Ungültiger Betrag bei '${item.name}'.`);if(!validIntervals.has(item.interval))throw new Error(`Ungültiges Intervall bei '${item.name}'.`);if(item.dueMonth!==null&&item.dueMonth!==undefined&&(!Number.isInteger(item.dueMonth)||item.dueMonth<1||item.dueMonth>12))throw new Error(`Ungültiger Monat bei '${item.name}'.`);}
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function validateData(input){if(!input||typeof input!=='object')throw new Error('Ungültiges JSON.');for(const key of ['accounts','incomes','expenses','transfers'])if(!Array.isArray(input[key]))throw new Error(`Feld '${key}' muss ein Array sein.`);const accountIds=new Set();for(const a of input.accounts){if(!a.id||typeof a.id!=='string')throw new Error('Konto ohne gültige ID.');if(!a.name||typeof a.name!=='string')throw new Error('Konto ohne Namen.');if(accountIds.has(a.id))throw new Error('Doppelte Konto-ID.');accountIds.add(a.id);}for(const collection of ['incomes','expenses'])for(const item of input[collection]){validateMovement(item);if(!accountIds.has(item.accountId))throw new Error(`Unbekanntes Konto bei '${item.name}'.`);}for(const t of input.transfers){validateMovement(t);if(!accountIds.has(t.fromAccountId)||!accountIds.has(t.toAccountId))throw new Error(`Unbekanntes Konto beim Transfer '${t.name}'.`);if(t.fromAccountId===t.toAccountId)throw new Error('Quell- und Zielkonto müssen verschieden sein.');}}
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async function ensureDataFile(){await fs.mkdir(dataDir,{recursive:true});try{await fs.access(dataFile);}catch{await atomicWrite(emptyData(),false);}}
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async function readData(){await ensureDataFile();const raw=await fs.readFile(dataFile,'utf8');const parsed=JSON.parse(raw);const data=normalizeData(parsed);validateData(data);if(parsed.version!==3||!parsed.settings||[...parsed.incomes||[],...parsed.expenses||[],...parsed.transfers||[]].some(x=>!x.interval)||parsed.accounts?.some(a=>Object.hasOwn(a,'balance')))await atomicWrite(data,true);return data;}
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async function atomicWrite(input,makeBackup=true){const data=normalizeData(input);validateData(data);await fs.mkdir(dataDir,{recursive:true});const tmp=`${dataFile}.${process.pid}.${crypto.randomUUID()}.tmp`;const payload=JSON.stringify(data,null,2)+'\n';if(makeBackup){try{await fs.copyFile(dataFile,backupFile);}catch(error){if(error.code!=='ENOENT')throw error;}}await fs.writeFile(tmp,payload,{encoding:'utf8',mode:0o600});await fs.rename(tmp,dataFile);}
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app.disable('x-powered-by');app.use(express.json({limit:'1mb'}));app.get('/api/health',(_req,res)=>res.json({ok:true}));app.get('/api/data',async(_req,res,next)=>{try{res.json(await readData());}catch(e){next(e);}});app.put('/api/data',async(req,res,next)=>{try{await atomicWrite(req.body);res.json(await readData());}catch(e){next(e);}});app.get('/api/export',async(_req,res,next)=>{try{const data=await readData();res.setHeader('Content-Disposition','attachment; filename="fixfin-backup.json"');res.type('application/json').send(JSON.stringify(data,null,2)+'\n');}catch(e){next(e);}});
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const dist=path.resolve(__dirname,'../dist');app.use(express.static(dist));app.use((_req,res)=>res.sendFile(path.join(dist,'index.html')));app.use((error,_req,res,_next)=>{console.error(error);res.status(400).json({error:error.message||'Unbekannter Fehler'});});await ensureDataFile();app.listen(port,'0.0.0.0',()=>{console.log(`FixFin läuft auf Port ${port}`);console.log(`Datendatei: ${dataFile}`);});
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