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import os 

from functools import wraps 

from werkzeug import secure_filename 

from flask import request, Blueprint, render_template, jsonify, flash, \ 

    redirect, url_for as flask_url_for, g, abort 

from my_app import db, app, ALLOWED_EXTENSIONS, babel 

from my_app.catalog.models import Product, Category, ProductForm, CategoryForm 

from sqlalchemy.orm.util import join 

from flask.ext.babel import lazy_gettext as _ 

import geoip 

 

catalog = Blueprint('catalog', __name__) 

 

 

@app.before_request 

def before(): 

    if request.view_args and 'lang' in request.view_args: 

        g.current_lang = request.view_args['lang'] 

        request.view_args.pop('lang') 

 

 

@app.context_processor 

def inject_url_for(): 

    return { 

        'url_for': lambda endpoint, **kwargs: flask_url_for( 

            endpoint, lang=g.get('current_lang', 'en'), **kwargs 

        ) 

    } 

 

 

url_for = inject_url_for()['url_for'] 

 

 

@babel.localeselector 

def get_locale(): 

    return g.get('current_lang', 'en') 

 

 

def template_or_json(template=None): 

    """"Return a dict from your view and this will either 

    pass it to a template or render json. Use like: 

 

    @template_or_json('template.html') 

    """ 

    def decorated(f): 

        @wraps(f) 

        def decorated_fn(*args, **kwargs): 

            ctx = f(*args, **kwargs) 

            if request.is_xhr or not template: 

                return jsonify(ctx) 

            else: 

                return render_template(template, **ctx) 

        return decorated_fn 

    return decorated 

 

 

def allowed_file(filename): 

    return '.' in filename and \ 

            filename.lower().rsplit('.', 1)[1] in ALLOWED_EXTENSIONS 

 

 

@app.errorhandler(404) 

def page_not_found(e): 

    app.logger.error(e) 

    return render_template('404.html'), 404 

 

 

@catalog.route('/') 

@catalog.route('/<lang>/') 

@catalog.route('/<lang>/home') 

@template_or_json('home.html') 

def home(): 

    products = Product.query.all() 

    app.logger.info( 

        'Home page with total of %d products' % len(products) 

    ) 

    return {'count': len(products)} 

 

 

@catalog.route('/<lang>/product/<id>') 

def product(id): 

    product = Product.query.filter_by(id=id).first() 

    if not product: 

        app.logger.warning('Requested product not found.') 

        abort(404) 

    return render_template('product.html', product=product) 

 

 

@catalog.route('/<lang>/products') 

@catalog.route('/<lang>/products/<int:page>') 

def products(page=1): 

    products = Product.query.paginate(page, 10) 

    return render_template('products.html', products=products) 

 

 

@catalog.route('/<lang>/product-create', methods=['GET', 'POST']) 

def create_product(): 

    form = ProductForm(request.form) 

 

    if form.validate_on_submit(): 

        name = form.name.data 

        price = form.price.data 

        category = Category.query.get_or_404( 

            form.category.data 

        ) 

        image = request.files and request.files['image'] 

        filename = '' 

        if image and allowed_file(image.filename): 

            filename = secure_filename(image.filename) 

            image.save(os.path.join(app.config['UPLOAD_FOLDER'], filename)) 

        match = geoip.geolite2.lookup(request.remote_addr) 

        product = Product( 

            name, price, category, filename, 

            match and match.timezone or 'Localhost' 

        ) 

        db.session.add(product) 

        db.session.commit() 

        flash( 

            unicode(_('The product %(name)s has been created', name=name)), 

            'success' 

        ) 

        return redirect(url_for('catalog.product', id=product.id)) 

 

    if form.errors: 

        flash(form.errors, 'danger') 

 

    return render_template('product-create.html', form=form) 

 

 

@catalog.route('/<lang>/product-search') 

@catalog.route('/<lang>/product-search/<int:page>') 

def product_search(page=1): 

    name = request.args.get('name') 

    price = request.args.get('price') 

    company = request.args.get('company') 

    category = request.args.get('category') 

    products = Product.query 

    if name: 

        products = products.filter(Product.name.like('%' + name + '%')) 

    if price: 

        products = products.filter(Product.price == price) 

    if company: 

        products = products.filter(Product.company.like('%' + company + '%')) 

    if category: 

        products = products.select_from(join(Product, Category)).filter( 

            Category.name.like('%' + category + '%') 

        ) 

    return render_template( 

        'products.html', products=products.paginate(page, 10) 

    ) 

 

 

@catalog.route('/<lang>/category-create', methods=['GET', 'POST']) 

def create_category(): 

    form = CategoryForm(request.form) 

 

    if form.validate_on_submit(): 

        name = form.name.data 

        category = Category(name) 

        db.session.add(category) 

        db.session.commit() 

        flash( 

            unicode(_('The category %(name)s has been created', name=name)), 

            'success' 

        ) 

        return redirect( 

            url_for('catalog.category', id=category.id) 

        ) 

 

    if form.errors: 

        flash(form.errors, 'danger') 

 

    return render_template('category-create.html', form=form) 

 

 

@catalog.route('/<lang>/category/<id>') 

def category(id): 

    category = Category.query.get_or_404(id) 

    return render_template('category.html', category=category) 

 

 

@catalog.route('/<lang>/categories') 

def categories(): 

    categories = Category.query.all() 

    return render_template('categories.html', categories=categories)