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Migrating TODOs sample to gcloud #46

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Migrating TODOs sample to gcloud #46

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201 changes: 54 additions & 147 deletions nodejs/demos/todos/todo.js
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Original file line number Diff line number Diff line change
@@ -1,5 +1,3 @@
#! /usr/bin/env node
//
// Copyright 2013 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
Expand All @@ -13,187 +11,96 @@
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
var googleapis = require('googleapis'),
authclient = new googleapis.OAuth2Client(),
datasetId = 'gcd-codelab',
compute = new googleapis.auth.Compute(),
datastore = null,
todoListName = null;

// See https://github.com/GoogleCloudPlatform/gcloud-node#elsewhere
// to configure dataset ID and key filename.
var DATASET_ID = 'gcd-codelab',
KEY_FILENAME = '/path/to/key/file.json';

var gcloud = require('gcloud'),
datastore = gcloud.datastore;

var usage = 'usage todo.js <todolist> <add|get|del|edit|ls|archive> [todo-title|todo-id]';
compute.authorize(function(err, result) {
console.assert(!err, err);
googleapis.discover('datastore', 'v1beta1')
.withAuthClient(compute)
.execute(function(err, client) {
datastore = client.datastore.datasets;
todoListName = process.argv[2];
var cmd = process.argv[3];
console.assert(todoListName && cmd && commands[cmd], usage);
commands[cmd].apply(commands, process.argv.slice(4))
});
var cmd = process.argv[3];
todoListName = process.argv[2];

console.assert(todoListName && cmd && commands[cmd], usage);
commands[cmd].apply(commands, process.argv.slice(4));

var ds = gcloud.datastore.dataset({
projectId: DATASET_ID,
keyFilename: KEY_FILENAME
});

var commands = {
// level 0
add: function(title) {
datastore.blindWrite({
datasetId: datasetId,
mutation: {
insertAutoId: [{
key: {
path: [{ kind: 'TodoList', name: todoListName },
{ kind: 'Todo' }]
},
properties: {
title: { values: [{ stringValue: title }] },
completed: { values: [{ booleanValue: false }] }
}
}]
}
}).execute(function(err, result) {
ds.save({
key: datastore.key('TodoList', todoListName, 'Todo', null),
data: { title: title, completed: false }
}, function(err, key) {
console.assert(!err, err);
var key = result.mutationResult.insertAutoIdKeys[0];
console.log('%d: TODO %s', key.path[1].id, title);
});
console.log('Added TODO %s', title);
});
},
get: function(id, callback) {
datastore.lookup({
datasetId: datasetId,
keys: [{
path: [{ kind: 'TodoList', name: todoListName},
{ kind: 'Todo', id: id }]
}]
}).execute(function(err, result) {
var key = datastore.key('TodoList', todoListName, 'Todo', id);
ds.get(key, function(err, obj) {
console.assert(!err, err);
console.assert(!result.missing, 'todo %d: not found', id);
var entity = result.found[0].entity;
var title = entity.properties.title.values[0].stringValue;
var completed = entity.properties.completed.values[0].booleanValue == true;
if (callback) {
callback(err, id, title, completed);
} else {
console.log('%d: %s %s', id, completed && 'DONE' || 'TODO', title);
}
console.log('%d: %s %s', id, obj.data.completed && 'DONE' || 'TODO', obj.data.title);
});
},
// level 1
del: function(id) {
datastore.blindWrite({
datasetId: datasetId,
mutation: {
delete: [{
path: [{ kind: 'TodoList', name: todoListName },
{ kind: 'Todo', id: id }]
}]
}
}).execute(function(err, result) {
var key = datastore.key('TodoList', todoListName, 'Todo', id);
ds.delete(key, function(err) {
console.assert(!err, err);
console.log('%d: DEL', id);
});
},
// level 2
edit: function(id, title, completed) {
completed = completed === 'true';
datastore.blindWrite({
datasetId: datasetId,
mutation: {
update: [{
key: {
path: [{ kind: 'TodoList', name: todoListName },
{ kind: 'Todo', id: id } ]
},
properties: {
title: { values: [{ stringValue: title }] },
completed: { values: [{ booleanValue: completed }] }
}
}]
}
}).execute(function(err, result) {
ds.save({
key: datastore.key('TodoList', todoListName, 'Todo', id),
data: { title: title, completed: completed }
}, function(err, key) {
console.assert(!err, err);
console.log('%d: %s %s', id, completed && 'DONE' || 'TODO', title);
});
},
ls: function() {
datastore.runQuery({
datasetId: datasetId,
query: {
kinds: [{ name: 'Todo' }],
filter: {
propertyFilter: {
property: { name: '__key__' },
operator: 'hasAncestor',
value: {
keyValue: {
path: [{ kind: 'TodoList', name: todoListName }]
}
}
}
}
}
}).execute(function(err, result) {
var entityResults = result.batch.entityResults || [];
entityResults.forEach(function(entityResult) {
var entity = entityResult.entity;
var id = entity.key.path[1].id;
var properties = entity.properties;
var title = properties.title.values[0].stringValue;
var completed = properties.completed.values[0].booleanValue == true;
console.log('%d: %s %s', id, completed && 'DONE' || 'TODO', title);
var q = ds.createQuery('Todo')
.hasAncestor(datastore.key('TodoList', todoListName));
ds.runQuery(q, function(err, items) {
console.assert(!err, err);
items.forEach(function(item) {
console.log('%d: %s %s', id, item.data.completed && 'DONE' || 'TODO', item.title);
});

});
},
// level 3
archive: function() {
datastore.beginTransaction({
datasetId: datasetId
}).execute(function(err, result) {
var tx = result.transaction;
datastore.runQuery({
datasetId: datasetId,
readOptions: { transaction: tx },
query: {
kinds: [{ name: 'Todo' }],
filter: {
compositeFilter: {
operator: 'and',
filters: [{
propertyFilter: {
property: { name: '__key__' },
operator: 'hasAncestor',
value: { keyValue: {
path: [{ kind: 'TodoList', name: todoListName }]
}}
}
}, {
propertyFilter: {
property: { name: 'completed' },
operator: 'equal',
value: { booleanValue: true }
}
}]
}
}
// Deletes completed todos
ds.transaction(function(t, done) {
t.runQuery(q, function(err, items) {
if (err) {
t.rollback(done);
return;
}
}).execute(function(err, result) {
var keys = [];
var entityResults = result.batch.entityResults || [];
entityResults.forEach(function(entityResult) {
keys.push(entityResult.entity.key);
var keys = (items || []).map(function(item) {
return item.key;
});
datastore.commit({
datasetId: datasetId,
transaction: tx,
mutation: { delete: keys }
}).execute(function(err, result) {
console.assert(!err, err);
keys.forEach(function(key) {
console.log('%d: DEL', key.path[1].id);
});
t.delete(keys, function(err) {
if (err) {
t.rollback(done);
return;
}
// auto commits if no error.
});
});
}, function(err) {
console.assert(!err, err);
});
}
};