xppl/app/views.py

"""
Flask Documentation:     http://flask.pocoo.org/docs/
Jinja2 Documentation:    http://jinja.pocoo.org/2/documentation/
Werkzeug Documentation:  http://werkzeug.pocoo.org/documentation/
This file creates your application.
"""

from app import app, db
from flask import Flask, render_template, request, redirect, url_for, flash, send_from_directory, jsonify, abort
import json
from  sqlalchemy.sql.expression import func, select
from app.forms import UploadForm, EditForm, SearchForm
from app.models import Book, BookSchema, Author, AuthorSchema, Stack, StackSchema, UserIns
from app.cover import get_cover

import os
from werkzeug.utils import secure_filename

# import sqlite3
ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'epub', 'chm', 'mobi'])

author_schema = AuthorSchema()
authors_schema = AuthorSchema(many=True)
book_schema = BookSchema()
books_schema = BookSchema(many=True)
stack_schema = StackSchema()
stacks_schema = StackSchema(many=True)

def allowed_file(filename):
    return '.' in filename and \
           filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS
###
# Routing for your application.
###

@app.route('/')
def home():
    """Render website's home page."""
    return render_template('home.html')

@app.route('/hello/<name>')
def hello(name):
    return "Hello " + name

@app.route('/about/')
def about():
    """Render the website's about page."""
    return render_template('about.html', name="Mary Jane")

@app.route('/uploads/<filename>')
def uploaded_file(filename):
    return send_from_directory(app.config['UPLOAD_FOLDER'],
                               filename)

@app.route('/uploads/cover/<filename>')
def uploaded_file_cover(filename):
    return send_from_directory(app.config['UPLOAD_FOLDER_COVER'],
                               filename)

@app.route('/books', methods= ['POST','GET'])
def show_books():
    books = db.session.query(Book).all()
    search = SearchForm(request.form)
    if request.method == 'POST':
        if search.select.data == 'Title':
            return redirect((url_for('search_results', query=search.search.data)))
        if search.select.data == 'Category':
            return redirect((url_for('search_cat', query=search.search.data)))

    return render_template('show_books.html', books=books, form=search)

@app.route('/updates', methods=['POST', 'GET'])
def get_updates():
    userin = UserIns.query.filter_by(title="lastViewed").first()
    return "XPPL / / / / / / / Last viewed: " + userin.info + " / / / / / / / "

@app.route('/scape', methods=['POST', 'GET'])
def scape():
    if request.method == 'POST':
        data = request.form
        book = Book.query.get(data['id'])
        print(book.scapeX)
        book.scapeX = data['x']
        book.scapeY = data['y']
        db.session.commit()
    books = db.session.query(Book).all() # or you could have used User.query.all()
    return render_template('scape.html', books=books)


@app.route('/books_grid')
def show_books_grid():
    books = db.session.query(Book).all() # or you could have used User.query.all()
    return render_template('show_books_grid.html', books=books)

@app.route('/books/<int:id>')
def show_book_by_id(id):
    book = Book.query.get(id)
    userin = UserIns.query.filter_by(title="lastViewed").first()
    if userin != None:
        userin.info = book.title
        db.session.commit()
    else:
        user_info = UserIns("lastViewed", book.title)
        db.session.add(user_info)
        db.session.commit()
    if not book:
        return render_template('red_link.html', id=id)
    else:
        return render_template('show_book_detail.html', book=book)


@app.route('/books/<int:id>/delete', methods=['POST', 'GET'])
def remove_book_by_id(id):
    book_to_edit = Book.query.filter_by(id=id).first()
    title = book_to_edit.title
    Book.query.filter_by(id=id).delete()
    #author_table = Author.query.filter_by(book_id=book_to_edit.id).delete()
    db.session.commit()
    flash("%s deleted from library" % (title))
    return redirect(url_for('show_books'))

@app.route('/books/<int:id>/edit', methods=['POST', 'GET'])
def edit_book_by_id(id):
    book_to_edit = Book.query.filter_by(id=id).first()
    user_form = EditForm(title = book_to_edit.title, author =book_to_edit.authors, category = book_to_edit.category, year_published= book_to_edit.year_published)

    if request.method == 'POST':
        if user_form.validate_on_submit():
            # check if the post request has the file part
            title = user_form.title.data # You could also have used request.form['name']
            input_authors = user_form.author.data # You could also have used request.form['email']
            category = user_form.category.data
            year_published = user_form.year_published.data
            if year_published=="":
                year_published = None
            # save user to database
            #book = Book(title, author, filename, cover, file_extension)

            book = Book.query.filter_by(id=id).first()
            book.title = title
            book.category = category
            book.year_published = year_published

            #authors update
            book.authors.clear()
            for i, author in enumerate(input_authors):
                author_name = author.get("author_name")
                if author_name:
                    a = db.session.query(Author).filter_by(author_name=author_name).first()
                    if a == None:
                        a = Author(author_name=author_name)
                        db.session.add(a)
                    book.authors.append(a)
            db.session.commit()
            flash("%s updated" % (title))
            return redirect(url_for('show_book_by_id', id=id))

    return render_template('edit_book_detail.html', book=book_to_edit, form=user_form)


@app.route('/add-book', methods=['POST', 'GET'])
def add_book():
    upload_form = UploadForm()

    if request.method == 'POST':
        if upload_form.validate_on_submit():
            #get data from form
            title = upload_form.title.data
            authors = upload_form.author.data
            category = upload_form.category.data
            year_published = upload_form.year_published.data
            if year_published=="":
                year_published = None

            #if upload with file
            if upload_form.upload.data:
                # check if the post request has the file part
                if 'file' not in request.files:
                    flash('No file part')
                    return redirect(request.url)
                file = request.files['file']
                # if user does not select file, browser also
                # submit a empty part without filename
                if file.filename == '':
                    flash('No selected file')
                    return redirect(request.url)
                if file and allowed_file(file.filename):
                    filename = secure_filename(file.filename)
                    allbooks = db.session.query(Book).all()
                    id = len(allbooks)+1
                    new_filename = str(id) +"_"+ filename
                    fullpath = os.path.join(app.config['UPLOAD_FOLDER'], new_filename)
                    name, file_extension = os.path.splitext(new_filename)
                    file.save(fullpath)
                    cover = get_cover(fullpath, name)
                else:
                    flash('allowed file formats: %s' % ALLOWED_EXTENSIONS)
            #if upload without file -> wishform, with potential PDF
            if upload_form.wish.data:
                #TO DO: make pdf generator
                #file = open('app/uploads/potential.pdf')
                #filename = 'potential.pdf'
                #file_extension = '.pdf'
                filename = ''
                file_extension = ''
                cover = ''

            book = Book(title, filename, cover, file_extension, category,year_published)
            db.session.add(book)
            for author in authors:
                author_name = author.get("author_name")
                if author_name:
                    a = db.session.query(Author).filter_by(author_name=author_name).first()
                    if a == None:
                        a = Author(author_name=author_name)
                        db.session.add(a)
                    book.authors.append(a)
            db.session.commit()

            flash("%s added to the library" % (title))
            return redirect(url_for('show_books'))

    flash_errors(upload_form)
    return render_template('add_book.html', form=upload_form)


# Flash errors from the form if validation fails
def flash_errors(form):
    for field, errors in form.errors.items():
        for error in errors:
            flash(u"Error in the %s field - %s" % (
                getattr(form, field).label.text,
                error
            ))

#Authors

@app.route('/authors/<int:id>')
def show_author_by_id(id):
    author = Author.query.get(id)
    if not author:
        abort (404)
    else:
        return render_template('show_author_detail.html', author=author)


@app.route('/authors/<int:id>/edit', methods=['POST', 'GET'])
def edit_author_by_id(id):
    return "Ask the programmer."

##stacks

@app.route('/stacks')
def show_stacks():
    stacks = db.session.query(Stack).all()
    return render_template('show_stacks.html', stacks=stacks)

@app.route('/stacks/<int:id>', methods=['POST', 'GET'])
def show_stack_by_id(id):
    stack = Stack.query.get(id)
    if not stack:
        abort (404)
    else:
        return render_template('show_stack_detail.html', stack=stack)

## search

@app.route('/search/titles/<query>/', methods=['POST', 'GET'])
def search_results(query):
    search = SearchForm(request.form)
    random_order=Book.query.order_by(func.random()).limit(10)
    results=Book.query.filter(Book.title.contains(query)).all()

    if not results:
        upload_form = UploadForm(title= query, author='')
        return render_template('red_link.html', form=upload_form, title=query)

    if request.method == 'POST':
        query = search.search.data
        results = []
        if search.select.data == 'Title':
            return redirect((url_for('search_results', query=search.search.data)))
        if search.select.data == 'Category':
            return redirect((url_for('search_cat', query=search.search.data)))

    return render_template('results.html', form=search, books=results, books_all=random_order, query=query)

@app.route('/search/cat/<query>/', methods=['POST', 'GET'])
def search_cat(query):
    search = SearchForm(request.form)
    random_order=Book.query.order_by(func.random()).limit(10)
    results=Book.query.filter(Book.category.contains(query)).all()

    if not results:
        upload_form = UploadForm(category=query)
        return render_template('red_link.html', form=upload_form, category=query)

    if request.method == 'POST':
        query = search.search.data
        results = []
        if search.select.data == 'Title':
            return redirect((url_for('search_results', query=search.search.data)))
        if search.select.data == 'Category':
            return redirect((url_for('search_cat', query=search.search.data)))

    return render_template('results.html', form=search, books=results, books_all=random_order, query=query)

###
# The API
###

@app.route('/api/books', methods=['GET'])
def get_books():
    books = Book.query.all()
    data = books_schema.dump(books)
    #print(errors)
    return jsonify({'books': data})

@app.route('/api/books/<int:id>', methods=['GET'])
def get_book_by_id(id):
    book = Book.query.get(id)
    data = book_schema.dump(book)
    if not data:
        return jsonify({"message": "Book could not be found."}), 400
    else:
        return jsonify({'book': data })




###
# The functions below should be applicable to all Flask apps.
###

@app.route('/<file_name>.txt')
def send_text_file(file_name):
    """Send your static text file."""
    file_dot_text = file_name + '.txt'
    return app.send_static_file(file_dot_text)

@app.route('/annotations')
def annotations():
    """Render annotations page."""
    return render_template('annotations.html')

@app.after_request
def add_header(response):
    """
    Add headers to both force latest IE rendering engine or Chrome Frame,
    and also to cache the rendered page for 10 minutes.
    """
    response.headers['X-UA-Compatible'] = 'IE=Edge,chrome=1'
    response.headers['Cache-Control'] = 'public, max-age=600'
    return response


@app.errorhandler(404)
def page_not_found(error):
    """Custom 404 page."""
    return render_template('404.html'), 404


if __name__ == '__main__':
    app.run(debug=True,host="0.0.0.0",port="8080")