Meetup

meteor-patterns-1

## Meteor Patterns ##

----------

# 1. Simple Search

 - Avoid duplicating the same query code on the client and server.
 - Provide some simple search results.

> common/utils.js

```js
RegExp.escape = function(s) {
  return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
};
```


----------


### Common Cursor:

> common/collections/books.js

```js
Books = new Meteor.Collection('books');

Books.search = function(query) {
  if (_.isEmpty(query))
    return;

  return Books.find({
    name: { $regex: RegExp.escape(query), $options: 'i' }
  });
};
```


----------


### Publication

> server/publications.js

```js
Meteor.publish('booksSearch', function(query) {
  check(query, String); 
  
  if (_.isEmpty(query))
    return this.ready();

  return Books.search(query);
});
```


----------


### Client Stuff


> client/views/books.html

```html
<template name="books">
  <input type="text" placeholder="Search..." value="{{booksSearchQuery}}">

  {{#if searchResults.count}}
    <ul>
    {{#each searchResults}}
      <li>{{name}}</li>
    {{/each}}
    </ul>
  {{/if}}
</template>
```

> client/views/books.js

```js
Deps.autorun(function() {
  Meteor.subscribe('booksSearch', Session.get('booksSearchQuery'));
});

Template.books.events({
  'keyup [type="text"]': function(event, template) {
    Session.set('booksSearchQuery', event.target.value);
  }
});

Template.books.helpers({
  searchResults: function() {
    return Books.search(Session.get('booksSearchQuery'));
  },
  booksSearchQuery: function() {
    return Session.get('booksSearchQuery');
  }
});
```


----------


# 2. Publications for signed-in users

### Regular way

```js
Meteor.publish('books', function() {
  if (! this.userId)
    return this.ready();

  return Books.find({ userId: this.userId });
});

Meteor.publish('authors', function() {
  if (! this.userId)
    return this.ready();

  return Authors.find({ userId: this.userId });
});
```

### With wrapper function

```js
Meteor.publishAuth = function(name, fn) {
  Meteor.publish(name, function() {
    if (! this.userId)
      return this.ready();
    
    return fn.apply(this, arguments);
  });
};

Meteor.publishAuth('books', function() {
  return Books.find({ userId: this.userId });
});

Meteor.publishAuth('authors', function() {
  return Authors.find({ userId: this.userId });
});
```