JimV-C/views/disk.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-


import json
from flask import Blueprint, render_template, url_for, request
import requests
from math import ceil
from models.status import StorageMode


__author__ = 'James Iter'
__date__ = '2017/6/25'
__contact__ = 'james.iter.cn@gmail.com'
__copyright__ = '(c) 2017 by James Iter.'


blueprint = Blueprint(
    'v_disk',
    __name__,
    url_prefix='/disk'
)

blueprints = Blueprint(
    'v_disks',
    __name__,
    url_prefix='/disks'
)


def show():
    args = list()
    page = int(request.args.get('page', 1))
    page_size = int(request.args.get('page_size', 10))
    keyword = request.args.get('keyword', None)
    show_area = request.args.get('show_area', 'unmount')
    guest_uuid = request.args.get('guest_uuid', None)
    sequence = request.args.get('sequence', None)
    order_by = request.args.get('order_by', None)
    order = request.args.get('order', None)
    filters = list()
    resource_path = request.path

    if page is not None:
        args.append('page=' + page.__str__())

    if page_size is not None:
        args.append('page_size=' + page_size.__str__())

    if keyword is not None:
        args.append('keyword=' + keyword.__str__())

    if guest_uuid is not None:
        filters.append('guest_uuid:in:' + guest_uuid.__str__())
        show_area = 'all'

    if sequence is not None:
        filters.append('sequence:in:' + sequence.__str__())
        show_area = 'all'

    if show_area in ['unmount', 'data_disk', 'all']:
        if show_area == 'unmount':
            filters.append('sequence:eq:-1')

        elif show_area == 'data_disk':
            filters.append('sequence:gt:0')

        else:
            pass

    else:
        # 与前端页面相照应，首次打开时，默认只显示未挂载的磁盘
        filters.append('sequence:eq:-1')

    if order_by is not None:
        args.append('order_by=' + order_by)

    if order is not None:
        args.append('order=' + order)

    if filters.__len__() > 0:
        args.append('filter=' + ','.join(filters))

    host_url = request.host_url.rstrip('/')

    disks_url = host_url + url_for('api_disks.r_get_by_filter')

    config_url = host_url + url_for('api_config.r_get')

    if keyword is not None:
        disks_url = host_url + url_for('api_disks.r_content_search')
        # 关键字检索，不支持显示域过滤
        show_area = 'all'

    if args.__len__() > 0:
        disks_url = disks_url + '?' + '&'.join(args)

    disks_ret = requests.get(url=disks_url)
    disks_ret = json.loads(disks_ret.content)

    guest_uuids = list()

    for disk in disks_ret['data']:
        if disk['guest_uuid'].__len__() == 36:
            guest_uuids.append(disk['guest_uuid'])

    if guest_uuids.__len__() > 0:
        guests_url = host_url + url_for('api_guests.r_get_by_filter')
        guests_url += '?filter=uuid:in:' + ','.join(guest_uuids)
        guests_ret = requests.get(url=guests_url)
        guests_ret = json.loads(guests_ret.content)

        guests_uuid_mapping = dict()
        for guest in guests_ret['data']:
            guests_uuid_mapping[guest['uuid']] = guest

        for i, disk in enumerate(disks_ret['data']):
            if disk['guest_uuid'].__len__() == 36:
                disks_ret['data'][i]['guest'] = guests_uuid_mapping[disk['guest_uuid']]

    config_ret = requests.get(url=config_url)
    config_ret = json.loads(config_ret.content)

    show_on_host = False
    if config_ret['data']['storage_mode'] == StorageMode.local.value:
        show_on_host = True

    last_page = int(ceil(disks_ret['paging']['total'] / float(page_size)))
    page_length = 5
    pages = list()
    if page < int(ceil(page_length / 2.0)):
        for i in range(1, page_length + 1):
            pages.append(i)
            if i == last_page or last_page == 0:
                break

    elif last_page - page < page_length / 2:
        for i in range(last_page - page_length + 1, last_page + 1):
            if i < 1:
                continue
            pages.append(i)

    else:
        for i in range(page - page_length / 2, page + int(ceil(page_length / 2.0))):
            pages.append(i)
            if i == last_page or last_page == 0:
                break

    return render_template('disks_show.html', disks_ret=disks_ret, resource_path=resource_path, page=page,
                           page_size=page_size, keyword=keyword, pages=pages, order_by=order_by, order=order,
                           last_page=last_page, show_area=show_area, config_ret=config_ret, show_on_host=show_on_host)


def create():
    host_url = request.host_url.rstrip('/')

    if request.method == 'POST':
        size = request.form.get('size')
        quantity = request.form.get('quantity')
        remark = request.form.get('remark')
        on_host = request.form.get('on_host')

        payload = {
            "size": int(size),
            "quantity": int(quantity),
            "remark": remark,
            "on_host": on_host
        }

        url = host_url + '/api/disk'
        headers = {'content-type': 'application/json'}
        r = requests.post(url, data=json.dumps(payload), headers=headers)
        j_r = json.loads(r.content)
        return render_template('success.html', go_back_url='/disks', timeout=10000, title='提交成功',
                               message_title='创建实例的请求已被接受',
                               message='您所提交的资源正在创建中。根据所提交资源的数量，需要等待几到十几秒钟。页面将在10秒钟后自动跳转到实例列表页面！')

    else:
        config_url = host_url + url_for('api_config.r_get')
        config_ret = requests.get(url=config_url)
        config_ret = json.loads(config_ret.content)

        show_on_host = False
        if config_ret['data']['storage_mode'] == StorageMode.local.value:
            show_on_host = True

        return render_template('disk_create.html', show_on_host=show_on_host)


def detail(uuid):
    host_url = request.host_url.rstrip('/')

    disk_url = host_url + url_for('api_disks.r_get', uuids=uuid)

    disk_ret = requests.get(url=disk_url)
    disk_ret = json.loads(disk_ret.content)

    guest_ret = None
    os_template_ret = None

    if disk_ret['data']['sequence'] != -1:
        guest_url = host_url + url_for('api_guests.r_get', uuids=disk_ret['data']['guest_uuid'])

        guest_ret = requests.get(url=guest_url)
        guest_ret = json.loads(guest_ret.content)

        os_template_url = host_url + url_for('api_os_templates.r_get', ids=guest_ret['data']['os_template_id'].__str__())

        os_template_ret = requests.get(url=os_template_url)
        os_template_ret = json.loads(os_template_ret.content)

    return render_template('disk_detail.html', uuid=uuid, guest_ret=guest_ret, os_template_ret=os_template_ret,
                           disk_ret=disk_ret)