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//move queries into a simple object | |
//to make the more explicit | |
var queries = { | |
_extend: function(query) { | |
query.exec = function(callback) { | |
db.query(query.query, query.values, callback); | |
} | |
} | |
getRestaurant: (restaurantId) { | |
var query = { | |
type: 'select' | |
, table: 'restaurants' | |
, columns: ['*'] | |
, where: {id: restaurantId} | |
}; | |
return this._extend(db.builder.sql(query)); | |
}, | |
getCategoriesForRestaurant: (restaurantId) { | |
var query = { | |
type: 'select' | |
, table: 'categories' | |
, columns: ['*'] | |
, where: {restaurant_id: restaurantId} | |
, order: {order: 'asc'} | |
} | |
return this._extend(db.builder.sql(query)); | |
}, | |
getItemsForRestaurant: (restaurantId) { | |
var query = { | |
type: 'select' | |
, table: 'items' | |
, columns: ['*'] | |
, where: {restaurant_id: restaurantId} | |
, order: {order: 'asc'} | |
} | |
return this._extend(db.builder.sql(query)); | |
} | |
}; | |
var ok = require('okay'); | |
module.exports.menu = function(req, res) { | |
//introduce variable to describe query parameters | |
var restaurantId = parseInt(req.params.id); | |
var tasks = { | |
getRestaurant: function(callback) { | |
var sql = queries.getRestaurant(restaurantId); | |
sql.exec(ok(callback, function(results) { | |
var data = { | |
restaurant: results[0], | |
categories: null | |
items: null | |
}; | |
return callback(null, data); | |
})); | |
} | |
, getCategories: function(data, callback) { | |
var sql = queries.getCategoriesForRestaurant(restaurantId); | |
sql.exec(ok(callback, function(results) { | |
data.categories = results; | |
return callback(null, data); | |
})); | |
} | |
, getItems: function(data, callback) { | |
var sql = queries.getCategoriesForRestaurant(restaurantId); | |
sql.exec(ok(callback, function(results) { | |
data.items = results; | |
return callback(null, data); | |
})); | |
} | |
} | |
var done = function(error, data) { | |
if (error) return res.error(errors.internal.DB_FAILURE, error, callback); | |
var menu = []; | |
var categoryIdMenuIndex = {}; | |
for(var i=0; i<data.categories.length; i++) { | |
var category = data.categories[i]; | |
category.items = []; | |
menu.push(category); | |
categoryIdMenuIndex[category.id] = i; | |
} | |
for(var i=0; i<data.items.length; i ++) { | |
var item = data.items[i]; | |
var category = menu[categoryIdMenuIndex[item.category_id]]; | |
category.items.push(item); | |
} | |
res.render('menu', {restaurant: data.restaurant, menu: menu}, function(error, html) { | |
if (error) return res.error(errors.internal.UNKNOWN, error); | |
res.render('index', {content: html}, function(error, html) { | |
if (error) return res.error(errors.internal.UNKNOWN, error); | |
return res.send(html); | |
}) | |
}); | |
} | |
utils.async.waterfall(tasks, done); | |
} |
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