Beginning of work on templates.

models/templates.js

@@ -0,0 +1,91 @@
+'use strict';
+
+const knex = require('../lib/knex');
+const hasher = require('node-object-hash')();
+const { enforce, filterObject } = require('../lib/helpers');
+const dtHelpers = require('../lib/dt-helpers');
+const interoperableErrors = require('../shared/interoperable-errors');
+const namespaceHelpers = require('../lib/namespace-helpers');
+const shares = require('./shares');
+const reports = require('./reports');
+
+const allowedKeys = new Set(['name', 'description', 'type', 'data', 'html', 'text', 'namespace']);
+
+function hash(entity) {
+    return hasher.hash(filterObject(entity, allowedKeys));
+}
+
+async function getById(context, id) {
+    return await knex.transaction(async tx => {
+        await shares.enforceEntityPermissionTx(tx, context, 'template', id, 'view');
+        const entity = await tx('templates').where('id', id).first();
+        entity.permissions = await shares.getPermissionsTx(tx, context, 'template', id);
+        return entity;
+    });
+}
+
+async function listDTAjax(context, params) {
+    return await dtHelpers.ajaxListWithPermissions(
+        context,
+        [{ entityTypeId: 'template', requiredOperations: ['view'] }],
+        params,
+        builder => builder.from('templates').innerJoin('namespaces', 'namespaces.id', 'templates.namespace'),
+        [ 'templates.id', 'templates.name', 'templates.description', 'templates.type', 'templates.created', 'namespaces.name' ]
+    );
+}
+
+async function create(context, entity) {
+    return await knex.transaction(async tx => {
+        await shares.enforceEntityPermissionTx(tx, context, 'namespace', entity.namespace, 'createTemplate');
+        await namespaceHelpers.validateEntity(tx, entity);
+
+        const ids = await tx('templates').insert(filterObject(entity, allowedKeys));
+        const id = ids[0];
+
+        await shares.rebuildPermissionsTx(tx, { entityTypeId: 'template', entityId: id });
+
+        return id;
+    });
+}
+
+async function updateWithConsistencyCheck(context, entity) {
+    await knex.transaction(async tx => {
+        await shares.enforceEntityPermissionTx(tx, context, 'template', entity.id, 'edit');
+
+        const existing = await tx('templates').where('id', entity.id).first();
+        if (!existing) {
+            throw new interoperableErrors.NotFoundError();
+        }
+
+        const existingHash = hash(existing);
+        if (existingHash !== entity.originalHash) {
+            throw new interoperableErrors.ChangedError();
+        }
+
+        await namespaceHelpers.validateEntity(tx, entity);
+        await namespaceHelpers.validateMove(context, entity, existing, 'template', 'createTemplate', 'delete');
+
+        await tx('templates').where('id', entity.id).update(filterObject(entity, allowedKeys));
+
+        await shares.rebuildPermissionsTx(tx, { entityTypeId: 'template', entityId: entity.id });
+    });
+}
+
+async function remove(context, id) {
+    await knex.transaction(async tx => {
+        await shares.enforceEntityPermissionTx(tx, context, 'template', id, 'delete');
+
+        await reports.removeAllByReportTemplateIdTx(tx, context, id);
+
+        await tx('templates').where('id', id).del();
+    });
+}
+
+module.exports = {
+    hash,
+    getById,
+    listDTAjax,
+    create,
+    updateWithConsistencyCheck,
+    remove
+};