revamped db schema and implemented some simple api

lib/routes/api/decorate.js

@@ -0,0 +1,101 @@
+const assert = require('assert');
+const sysError = require('./error');
+
+module.exports = decorate;
+
+const decorators = {
+  'list': list,
+  'add': add,
+  'retrieve': retrieve,
+  'update': update,
+  'delete': remove
+};
+
+function decorate(router, klass, methods, preconditions) {
+  const decs = methods && Array.isArray(methods) && methods[0] !== '*' ? methods : Object.keys(decorators);
+  decs.forEach((m) => {
+    assert(m in decorators);
+    decorators[m](router, klass, preconditions);
+  });
+}
+
+function list(router, klass) {
+  router.get('/', async(req, res) => {
+    const logger = req.app.locals.logger;
+    //logger.info(`user: ${JSON.stringify(req.user)}`);
+    //logger.info(`scope: ${JSON.stringify(req.authInfo.scope)}`);
+    try {
+      const results = await klass.retrieveAll();
+      res.status(200).json(results);
+    } catch (err) {
+      sysError(logger, res, err);
+    }
+  });
+}
+
+function add(router, klass, preconditions) {
+  router.post('/', async(req, res) => {
+    const logger = req.app.locals.logger;
+    try {
+      if ('add' in preconditions) {
+        assert(typeof preconditions.add === 'function');
+        await preconditions.add(req);
+      }
+      const uuid = await klass.make(req.body);
+      res.status(201).json({sid: uuid});
+    } catch (err) {
+      sysError(logger, res, err);
+    }
+  });
+}
+
+function retrieve(router, klass) {
+  router.get('/:sid', async(req, res) => {
+    const logger = req.app.locals.logger;
+    try {
+      const results = await klass.retrieve(req.params.sid);
+      if (results.length === 0) return res.status(404).end();
+      return res.status(200).json(results[0]);
+    }
+    catch (err) {
+      sysError(logger, res, err);
+    }
+  });
+}
+
+function update(router, klass) {
+  router.put('/:sid', async(req, res) => {
+    const sid = req.params.sid;
+    const logger = req.app.locals.logger;
+    try {
+      const rowsAffected = await klass.update(sid, req.body);
+      if (rowsAffected === 0) {
+        return res.status(404).end();
+      }
+      res.status(204).end();
+    } catch (err) {
+      sysError(logger, res, err);
+    }
+  });
+}
+
+function remove(router, klass, preconditions) {
+  router.delete('/:sid', async(req, res) => {
+    const sid = req.params.sid;
+    const logger = req.app.locals.logger;
+    try {
+      if ('delete' in preconditions) {
+        assert(typeof preconditions.delete === 'function');
+        await preconditions.delete(req, sid);
+      }
+      const rowsAffected = await klass.remove(sid);
+      if (rowsAffected === 0) {
+        logger.info(`unable to delete ${klass.name} with sid ${sid}: not found`);
+        return res.status(404).end();
+      }
+      res.status(204).end();
+    } catch (err) {
+      sysError(logger, res, err);
+    }
+  });
+}