Files
SE-LTD/api/src/index.js
T
2026-06-23 14:48:36 +02:00

719 lines
23 KiB
JavaScript

import bcrypt from "bcryptjs";
import cors from "cors";
import express from "express";
import { authenticateToken, createToken, requireRoles } from "./auth.js";
import { config } from "./config.js";
import { pool } from "./db.js";
import {
createWideTrendTable,
ensureIspMetadata,
fetchLatestValues,
fetchTrendSeries,
getAvailableIsps,
normalizeEngineeringUnit,
normalizeRange,
sanitizeIspName,
sanitizePointIndex,
updateIspMetadata,
} from "./lib/isp.js";
import {
deleteSelection,
getDashboard,
getPreferences,
getRoleMap,
getSelection,
listRoles,
listSelections,
saveDashboard,
savePreferences,
saveRole,
saveSelection,
} from "./lib/store.js";
import { redis } from "./redis.js";
const app = express();
const wrap = (handler) => (req, res, next) => Promise.resolve(handler(req, res, next)).catch(next);
const allowedOrigins = config.corsOrigin
.split(",")
.map((entry) => entry.trim())
.filter(Boolean);
app.use(
cors({
origin(origin, callback) {
if (!origin || allowedOrigins.includes("*") || allowedOrigins.includes(origin)) {
callback(null, true);
return;
}
callback(new Error("Origin not allowed."));
},
})
);
app.use(express.json({ limit: "50mb" }));
function serializeUser(row) {
return {
id: row.id,
username: row.username,
name: row.name,
email: row.email,
role: row.role,
active: Boolean(row.active),
createdAt: row.created_at,
updatedAt: row.updated_at,
};
}
function assertPoints(points) {
if (!Array.isArray(points) || points.length === 0) {
throw new Error("At least one data point is required.");
}
return points.map((point) => ({
isp: sanitizeIspName(point.isp),
pointIndex: sanitizePointIndex(point.pointIndex),
}));
}
function canUseSelection(selection, user) {
return Boolean(selection) && (selection.shared || selection.ownerId === user.sub || user.role === "admin");
}
function slugifyUsername(value) {
const base = String(value || "")
.toLowerCase()
.replace(/[^a-z0-9]+/g, "-")
.replace(/^-+|-+$/g, "")
.slice(0, 40);
return base || "user";
}
function nextAvailableUsername(seed, taken) {
const base = slugifyUsername(seed);
let candidate = base;
let counter = 1;
while (taken.has(candidate)) {
candidate = `${base}-${counter}`;
counter += 1;
}
taken.add(candidate);
return candidate;
}
function normalizeSqlDump(sql) {
return String(sql || "")
.replace(/^\uFEFF/, "")
.split(/\r?\n/)
.filter((line) => !line.trim().toUpperCase().startsWith("DELIMITER "))
.join("\n")
.trim();
}
const PERMISSION_CATALOG = [
{ id: "view_dashboard", label: "Dashboard anzeigen" },
{ id: "view_trends", label: "Trendansicht anzeigen" },
{ id: "edit_aliases", label: "Aliase bearbeiten" },
{ id: "manage_sources", label: "Quellen verwalten" },
{ id: "manage_users", label: "Benutzer verwalten" },
{ id: "manage_roles", label: "Rollen verwalten" },
{ id: "view_debug", label: "Treiber-Debug anzeigen" },
];
async function getUserPermissions(roleName) {
const roleMap = await getRoleMap(redis);
return roleMap.get(String(roleName || "").trim())?.permissions || [];
}
async function serializeUserWithPermissions(row) {
const user = serializeUser(row);
return {
...user,
permissions: await getUserPermissions(user.role),
};
}
function requirePermission(...permissions) {
return async (req, res, next) => {
try {
if (!req.user) {
return res.status(401).json({ error: "Authentication required." });
}
const granted = new Set(await getUserPermissions(req.user.role));
if (!permissions.some((permission) => granted.has(permission))) {
return res.status(403).json({ error: "Insufficient permissions." });
}
next();
} catch (error) {
next(error);
}
};
}
function normalizeRoleName(value) {
return String(value || "")
.trim()
.toLowerCase()
.replace(/[^a-z0-9_-]+/g, "-")
.replace(/^-+|-+$/g, "")
.slice(0, 40) || "viewer";
}
async function resolveExistingRole(roleName, fallback = "viewer") {
const roleMap = await getRoleMap(redis);
const normalized = normalizeRoleName(roleName);
return roleMap.has(normalized) ? normalized : fallback;
}
async function ensureRolesSchema() {
await listRoles(redis);
try {
await pool.query("ALTER TABLE app_users MODIFY role VARCHAR(80) NOT NULL DEFAULT 'viewer'");
} catch {}
}
async function resolveSelectionPoints(body, user) {
if (body.selectionId) {
const selection = await getSelection(redis, body.selectionId);
if (!canUseSelection(selection, user)) {
throw new Error("Selection not found or not accessible.");
}
return assertPoints(selection.points || []);
}
return assertPoints(body.points || []);
}
async function ensureUtf8Database() {
await pool.query(`ALTER DATABASE \`${config.dbName}\` CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci`);
const [tables] = await pool.query(
`SELECT TABLE_NAME AS tableName
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = ?
AND (TABLE_NAME = 'app_users' OR TABLE_NAME LIKE 'isp%' OR TABLE_NAME LIKE 'trend_%')`,
[config.dbName]
);
for (const table of tables) {
await pool.query(`ALTER TABLE \`${table.tableName}\` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci`);
}
}
async function ensureUserSchema() {
await pool.query(
`
CREATE TABLE IF NOT EXISTS app_users (
id INT NOT NULL AUTO_INCREMENT,
username VARCHAR(80) NOT NULL,
name VARCHAR(120) NOT NULL,
email VARCHAR(160) NULL,
password_hash VARCHAR(255) NOT NULL,
role VARCHAR(80) NOT NULL DEFAULT 'viewer',
active TINYINT(1) NOT NULL DEFAULT 1,
created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
PRIMARY KEY (id),
UNIQUE KEY uniq_app_users_username (username),
UNIQUE KEY uniq_app_users_email (email)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
`
);
try {
await pool.query("ALTER TABLE app_users ADD COLUMN username VARCHAR(80) NULL AFTER id");
} catch {}
try {
await pool.query("ALTER TABLE app_users MODIFY email VARCHAR(160) NULL");
} catch {}
const [users] = await pool.query("SELECT id, username, name, email FROM app_users ORDER BY id");
const taken = new Set(users.map((user) => user.username).filter(Boolean));
for (const user of users) {
if (user.username) {
continue;
}
const seed = user.email?.split("@")[0] || user.name || `user-${user.id}`;
const username = nextAvailableUsername(seed, taken);
await pool.query("UPDATE app_users SET username = ? WHERE id = ?", [username, user.id]);
}
try {
await pool.query("ALTER TABLE app_users MODIFY username VARCHAR(80) NOT NULL");
} catch {}
try {
await pool.query("ALTER TABLE app_users ADD UNIQUE KEY uniq_app_users_username (username)");
} catch {}
try {
await pool.query("ALTER TABLE app_users ADD UNIQUE KEY uniq_app_users_email (email)");
} catch {}
try {
await pool.query("ALTER TABLE app_users MODIFY role VARCHAR(80) NOT NULL DEFAULT 'viewer'");
} catch {}
}
async function ensureAdminUser() {
const [rows] = await pool.query(
"SELECT * FROM app_users WHERE username = ? OR email = ? LIMIT 1",
[config.adminUsername.toLowerCase(), config.adminEmail.toLowerCase()]
);
if (rows[0]) {
const user = rows[0];
await pool.query(
`
UPDATE app_users
SET username = ?, name = ?, email = COALESCE(email, ?), role = 'admin', active = 1
WHERE id = ?
`,
[config.adminUsername.toLowerCase(), config.adminName, config.adminEmail.toLowerCase(), user.id]
);
return;
}
const passwordHash = await bcrypt.hash(config.adminPassword, 10);
await pool.query(
`
INSERT INTO app_users (username, name, email, password_hash, role, active)
VALUES (?, ?, ?, ?, 'admin', 1)
`,
[config.adminUsername.toLowerCase(), config.adminName, config.adminEmail.toLowerCase(), passwordHash]
);
}
app.get("/api/health", wrap(async (_req, res) => {
const [dbRows] = await pool.query("SELECT 1 AS ok");
const redisOk = await redis.ping();
res.json({
ok: dbRows[0]?.ok === 1 && redisOk === "PONG",
timestamp: new Date().toISOString(),
});
}));
app.post("/api/auth/login", wrap(async (req, res) => {
const username = String(req.body.username || "").trim().toLowerCase();
const password = String(req.body.password || "");
const [rows] = await pool.query(
"SELECT * FROM app_users WHERE (username = ? OR email = ?) AND active = 1 LIMIT 1",
[username, username]
);
const user = rows[0];
if (!user) {
return res.status(401).json({ error: "Ungültige Zugangsdaten." });
}
const isValid = await bcrypt.compare(password, user.password_hash);
if (!isValid) {
return res.status(401).json({ error: "Ungültige Zugangsdaten." });
}
const serializedUser = await serializeUserWithPermissions(user);
return res.json({
token: createToken(serializedUser),
user: serializedUser,
});
}));
app.post("/api/auth/change-password", authenticateToken, wrap(async (req, res) => {
const currentPassword = String(req.body.currentPassword || "");
const nextPassword = String(req.body.nextPassword || "");
if (nextPassword.length < 8) {
return res.status(400).json({ error: "Das neue Passwort muss mindestens 8 Zeichen lang sein." });
}
const [rows] = await pool.query("SELECT * FROM app_users WHERE id = ? LIMIT 1", [req.user.sub]);
const user = rows[0];
if (!user) {
return res.status(404).json({ error: "Benutzer nicht gefunden." });
}
const isValid = await bcrypt.compare(currentPassword, user.password_hash);
if (!isValid) {
return res.status(400).json({ error: "Das aktuelle Passwort stimmt nicht." });
}
const passwordHash = await bcrypt.hash(nextPassword, 10);
await pool.query("UPDATE app_users SET password_hash = ? WHERE id = ?", [passwordHash, user.id]);
res.json({ ok: true });
}));
app.get("/api/auth/me", authenticateToken, wrap(async (req, res) => {
const [rows] = await pool.query("SELECT * FROM app_users WHERE id = ? LIMIT 1", [req.user.sub]);
if (!rows[0]) {
return res.status(404).json({ error: "Benutzer nicht gefunden." });
}
return res.json({ user: await serializeUserWithPermissions(rows[0]) });
}));
app.get("/api/isps", authenticateToken, wrap(async (_req, res) => {
const isps = await getAvailableIsps(pool, config.dbName);
const response = await Promise.all(
isps.map(async (isp) => {
const metadata = await ensureIspMetadata(redis, isp.tableName, isp.pointCount);
return {
...isp,
displayName: metadata.displayName,
description: metadata.description,
};
})
);
res.json({ isps: response });
}));
app.get("/api/isps/:isp/aliases", authenticateToken, wrap(async (req, res) => {
const metadata = await ensureIspMetadata(redis, req.params.isp);
res.json(metadata);
}));
app.put(
"/api/isps/:isp/aliases",
authenticateToken,
requirePermission("edit_aliases"),
wrap(async (req, res) => {
const { displayName, description, points } = req.body || {};
const updated = await updateIspMetadata(redis, req.params.isp, (metadata) => {
if (typeof displayName === "string") {
metadata.displayName = displayName.trim() || metadata.displayName;
}
if (typeof description === "string") {
metadata.description = description.trim();
}
if (Array.isArray(points)) {
points.forEach((point) => {
const pointIndex = sanitizePointIndex(point.pointIndex);
const key = String(pointIndex);
metadata.points[key] = {
...metadata.points[key],
alias: String(point.alias || metadata.points[key].alias).trim() || metadata.points[key].alias,
unit: normalizeEngineeringUnit(point.unit || metadata.points[key].unit),
factor: Number.isFinite(Number(point.factor)) ? Number(point.factor) : metadata.points[key].factor,
kind: point.kind === "digital" ? "digital" : "analog",
min: Number.isFinite(Number(point.min)) ? Number(point.min) : metadata.points[key].min,
max: Number.isFinite(Number(point.max)) ? Number(point.max) : metadata.points[key].max,
color: typeof point.color === "string" ? point.color : metadata.points[key].color,
};
});
}
return metadata;
});
res.json(updated);
})
);
app.post("/api/trend-tables", authenticateToken, requirePermission("manage_sources"), wrap(async (req, res) => {
const rawName = String(req.body.tableName || "").trim().toLowerCase();
const displayName = String(req.body.displayName || rawName).trim();
const safeName = await createWideTrendTable(pool, rawName.startsWith("trend_") ? rawName : `trend_${rawName}`);
const metadata = await updateIspMetadata(redis, safeName, (current) => ({
...current,
displayName: displayName || current.displayName,
}));
res.status(201).json({ tableName: safeName, metadata });
}));
app.post(
"/api/admin/normalize-alias-metadata",
authenticateToken,
requirePermission("edit_aliases"),
wrap(async (req, res) => {
const targetIsp = req.body?.isp ? sanitizeIspName(req.body.isp) : null;
if (!targetIsp && req.user.role !== "admin") {
return res.status(403).json({ error: "Nur Admins dürfen alle ISPs auf einmal bereinigen." });
}
const targets = targetIsp
? [{ tableName: targetIsp, pointCount: 200 }]
: await getAvailableIsps(pool, config.dbName);
const normalized = [];
for (const isp of targets) {
const metadata = await ensureIspMetadata(redis, isp.tableName, isp.pointCount || 200);
normalized.push({ isp: isp.tableName, metadata });
}
res.json({ ok: true, normalizedCount: normalized.length, items: normalized });
})
);
app.post(
"/api/admin/import-sql",
authenticateToken,
requirePermission("manage_sources"),
wrap(async (req, res) => {
const sql = normalizeSqlDump(req.body.sql);
if (!sql) {
throw new Error("SQL-Inhalt ist leer.");
}
await pool.query(sql);
const isps = await getAvailableIsps(pool, config.dbName);
res.json({ ok: true, importedTables: isps.length, filename: req.body.filename || null });
})
);
app.get("/api/users", authenticateToken, requirePermission("manage_users"), wrap(async (_req, res) => {
const [rows] = await pool.query(
"SELECT id, username, name, email, role, active, created_at, updated_at FROM app_users ORDER BY username"
);
res.json({ users: rows.map(serializeUser) });
}));
app.post("/api/users", authenticateToken, requirePermission("manage_users"), wrap(async (req, res) => {
const username = String(req.body.username || "").trim().toLowerCase();
const name = String(req.body.name || "").trim();
const email = String(req.body.email || "").trim().toLowerCase() || null;
const password = String(req.body.password || "");
const role = await resolveExistingRole(req.body.role, "viewer");
if (!username || !name) {
return res.status(400).json({ error: "Username und Name sind erforderlich." });
}
if (password.length < 8) {
return res.status(400).json({ error: "Das Passwort muss mindestens 8 Zeichen lang sein." });
}
const passwordHash = await bcrypt.hash(password, 10);
await pool.query(
`
INSERT INTO app_users (username, name, email, password_hash, role, active)
VALUES (?, ?, ?, ?, ?, 1)
`,
[username, name, email, passwordHash, role]
);
const [rows] = await pool.query("SELECT * FROM app_users WHERE username = ? LIMIT 1", [username]);
res.status(201).json({ user: serializeUser(rows[0]) });
}));
app.patch("/api/users/:id", authenticateToken, requirePermission("manage_users"), wrap(async (req, res) => {
const userId = Number(req.params.id);
const payload = req.body || {};
const [rows] = await pool.query("SELECT * FROM app_users WHERE id = ? LIMIT 1", [userId]);
if (!rows[0]) {
return res.status(404).json({ error: "Benutzer nicht gefunden." });
}
const current = rows[0];
const username = typeof payload.username === "string" ? payload.username.trim().toLowerCase() || current.username : current.username;
const name = typeof payload.name === "string" ? payload.name.trim() || current.name : current.name;
const email = typeof payload.email === "string" ? payload.email.trim().toLowerCase() || null : current.email;
const nextRole = payload.role ? await resolveExistingRole(payload.role, current.role) : current.role;
if (userId === req.user.sub && payload.role && nextRole !== current.role) {
return res.status(403).json({ error: "Die eigene Rolle kann nicht geändert werden." });
}
const active = typeof payload.active === "boolean" ? Number(payload.active) : current.active;
const passwordHash = payload.password ? await bcrypt.hash(String(payload.password), 10) : current.password_hash;
await pool.query(
`
UPDATE app_users
SET username = ?, name = ?, email = ?, role = ?, active = ?, password_hash = ?
WHERE id = ?
`,
[username, name, email, nextRole, active, passwordHash, userId]
);
const [updatedRows] = await pool.query("SELECT * FROM app_users WHERE id = ? LIMIT 1", [userId]);
res.json({ user: serializeUser(updatedRows[0]) });
}));
app.get("/api/roles", authenticateToken, requirePermission("manage_roles"), wrap(async (_req, res) => {
const roles = await listRoles(redis);
res.json({ roles, permissions: PERMISSION_CATALOG });
}));
app.post("/api/roles", authenticateToken, requirePermission("manage_roles"), wrap(async (req, res) => {
const payload = req.body || {};
const name = normalizeRoleName(payload.name);
if (!name) {
return res.status(400).json({ error: "Rollenname fehlt." });
}
const role = await saveRole(redis, {
name,
label: String(payload.label || name).trim() || name,
permissions: Array.isArray(payload.permissions) ? payload.permissions : [],
});
res.status(201).json({ role });
}));
app.patch("/api/roles/:name", authenticateToken, requirePermission("manage_roles"), wrap(async (req, res) => {
const roleMap = await getRoleMap(redis);
const existing = roleMap.get(normalizeRoleName(req.params.name));
if (!existing) {
return res.status(404).json({ error: "Rolle nicht gefunden." });
}
const role = await saveRole(redis, {
...existing,
label: String(req.body.label || existing.label).trim() || existing.label,
permissions: Array.isArray(req.body.permissions) ? req.body.permissions : existing.permissions,
}, existing.name);
res.json({ role });
}));
app.get("/api/selections", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const selections = await listSelections(redis, req.user);
res.json({ selections });
}));
app.post("/api/selections", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const points = assertPoints(req.body.points || []);
const selection = await saveSelection(redis, {
ownerId: req.user.sub,
ownerName: req.user.name,
name: String(req.body.name || "").trim() || "Neue Auswahl",
description: String(req.body.description || "").trim(),
shared: Boolean(req.body.shared),
points,
});
res.status(201).json({ selection });
}));
app.put("/api/selections/:selectionId", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const existing = await getSelection(redis, req.params.selectionId);
if (!existing) {
return res.status(404).json({ error: "Auswahl nicht gefunden." });
}
if (existing.ownerId !== req.user.sub && req.user.role !== "admin") {
return res.status(403).json({ error: "Du kannst nur eigene Auswahlen bearbeiten." });
}
const points = assertPoints(req.body.points || existing.points || []);
const selection = await saveSelection(
redis,
{
...existing,
name: String(req.body.name || existing.name).trim(),
description: String(req.body.description || existing.description || "").trim(),
shared: typeof req.body.shared === "boolean" ? req.body.shared : existing.shared,
points,
},
existing.id
);
res.json({ selection });
}));
app.delete("/api/selections/:selectionId", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const existing = await getSelection(redis, req.params.selectionId);
if (!existing) {
return res.status(404).json({ error: "Auswahl nicht gefunden." });
}
if (existing.ownerId !== req.user.sub && req.user.role !== "admin") {
return res.status(403).json({ error: "Du kannst nur eigene Auswahlen löschen." });
}
await deleteSelection(redis, existing.id);
res.status(204).send();
}));
app.post("/api/trends/query", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const points = await resolveSelectionPoints(req.body, req.user);
const trendData = await fetchTrendSeries(pool, redis, points, normalizeRange(req.body.range));
res.json(trendData);
}));
app.post("/api/points/latest", authenticateToken, requirePermission("view_trends"), wrap(async (req, res) => {
const points = await resolveSelectionPoints(req.body, req.user);
const values = await fetchLatestValues(pool, redis, points);
res.json({ values });
}));
app.get("/api/dashboard", authenticateToken, requirePermission("view_dashboard"), wrap(async (req, res) => {
const dashboard = await getDashboard(redis, req.user.sub);
res.json(dashboard);
}));
app.put("/api/dashboard", authenticateToken, requirePermission("view_dashboard"), wrap(async (req, res) => {
const dashboard = await saveDashboard(redis, req.user.sub, req.body || {});
res.json(dashboard);
}));
app.post("/api/dashboard/data", authenticateToken, requirePermission("view_dashboard"), wrap(async (req, res) => {
const widgets = Array.isArray(req.body.widgets) ? req.body.widgets : [];
const results = [];
for (const widget of widgets) {
const points = widget.selectionId ? await resolveSelectionPoints({ selectionId: widget.selectionId }, req.user) : assertPoints(widget.points || []);
if (widget.type === "chart") {
const trendData = await fetchTrendSeries(pool, redis, points, normalizeRange(widget.range));
results.push({ id: widget.id, type: widget.type, ...trendData });
} else {
const values = await fetchLatestValues(pool, redis, points);
results.push({ id: widget.id, type: widget.type, values });
}
}
res.json({ widgets: results });
}));
app.get("/api/preferences", authenticateToken, wrap(async (req, res) => {
const preferences = await getPreferences(redis, req.user.sub);
res.json(preferences);
}));
app.put("/api/preferences", authenticateToken, wrap(async (req, res) => {
const preferences = await savePreferences(redis, req.user.sub, req.body || {});
res.json(preferences);
}));
app.use((error, _req, res, _next) => {
console.error(error);
res.status(400).json({ error: error.message || "Unexpected error." });
});
await ensureUtf8Database();
await ensureUserSchema();
await ensureRolesSchema();
await ensureAdminUser();
app.listen(config.port, () => {
console.log(`SE Local Trenddata API listening on port ${config.port}`);
});