py-swirld/viz.py at master · Lapin0t/py-swirld · GitHub

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# -*- coding: utf-8 -*-


from random import shuffle
import sys
from base64 import b64encode
from time import localtime, strftime

from bokeh.io import curdoc
from bokeh.layouts import layout, widgetbox, row
from bokeh.plotting import figure
from bokeh.palettes import plasma, small_palettes
from bokeh.models import (
        FixedTicker, Button, ColumnDataSource, PanTool, Scroll,
        RadioButtonGroup, RadioGroup, Arrow, NormalHead, HoverTool)
from pysodium import crypto_sign_keypair

from utils import bfs, randrange
from swirld import Node


R_COLORS = small_palettes['Greens'][9]
shuffle(R_COLORS)
def round_color(r):
    return R_COLORS[r % 9]

I_COLORS = plasma(256)
def idx_color(r):
    return I_COLORS[r % 256]


class App:
    def __init__(self, n_nodes):
        self.i = 0
        kps = [crypto_sign_keypair() for _ in range(n_nodes)]
        stake = {kp[0]: 1 for kp in kps}

        network = {}
        self.nodes = [Node(kp, network, n_nodes, stake) for kp in kps]
        for n in self.nodes:
            network[n.pk] = n.ask_sync
        self.ids = {kp[0]: i for i, kp in enumerate(kps)}

        self.main_its = [n.main() for n in self.nodes]
        for m in self.main_its:
            next(m)

        def toggle():
            if play.label == '► Play':
                play.label = '❚❚ Pause'
                curdoc().add_periodic_callback(self.animate, 50)
            else:
                play.label = '► Play'
                curdoc().remove_periodic_callback(self.animate)

        play = Button(label='► Play', width=60)
        play.on_click(toggle)

        def sel_node(new):
            self.active = new
            node = self.nodes[new]
            self.tbd = {}
            self.tr_src.data, self.links_src.data = self.extract_data(
                    node, bfs((node.head,), lambda u: node.hg[u].p), 0)
            for u, j in tuple(self.tbd.items()):
                self.tr_src.data['line_alpha'][j] = 1 if node.famous.get(u) else 0
                if u in node.idx:
                    self.tr_src.data['round_color'][j] = idx_color(node.idx[u])
                self.tr_src.data['idx'][j] = node.idx.get(u)
                if u in node.idx and u in node.famous:
                    del self.tbd[u]
                    print('updated')
            self.tr_src.trigger('data', None, self.tr_src.data)

        selector = RadioButtonGroup(
                labels=['Node %i' % i for i in range(n_nodes)], active=0,
                name='Node to inspect')
        selector.on_click(sel_node)

        plot = figure(
                plot_height=700, plot_width=900, y_range=(0, 30),
                tools=[PanTool(dimensions=['height']),
                       HoverTool(tooltips=[
                           ('round', '@round'), ('hash', '@hash'),
                           ('timestamp', '@time'), ('payload', '@payload'),
                           ('number', '@idx')])])
        plot.xgrid.grid_line_color = None
        plot.xaxis.minor_tick_line_color = None
        plot.ygrid.grid_line_color = None
        plot.yaxis.minor_tick_line_color = None

        self.links_src = ColumnDataSource(data={'x0': [], 'y0': [], 'x1': [],
                                                'y1': [], 'width': []})
        #self.links_rend = plot.add_layout(
        #        Arrow(end=NormalHead(fill_color='black'), x_start='x0', y_start='y0', x_end='x1',
        #        y_end='y1', source=self.links_src))
        self.links_rend = plot.segment(color='#777777',
                x0='x0', y0='y0', x1='x1',
                y1='y1', source=self.links_src, line_width='width')

        self.tr_src = ColumnDataSource(
                data={'x': [], 'y': [], 'round_color': [], 'idx': [],
                    'line_alpha': [], 'round': [], 'hash': [], 'payload': [],
                    'time': []})

        self.tr_rend = plot.circle(x='x', y='y', size=20, color='round_color',
                                   line_alpha='line_alpha', source=self.tr_src, line_width=5)

        sel_node(0)
        curdoc().add_root(row([widgetbox(play, selector, width=300), plot], sizing_mode='fixed'))

    def extract_data(self, node, trs, i):
        tr_data = {'x': [], 'y': [], 'round_color': [], 'idx': [],
                'line_alpha': [], 'round': [], 'hash': [], 'payload': [],
                'time': []}
        links_data = {'x0': [], 'y0': [], 'x1': [], 'y1': [], 'width': []}
        for j, u in enumerate(trs):
            self.tbd[u] = i + j
            ev = node.hg[u]
            x = self.ids[ev.c]
            y = node.height[u]
            tr_data['x'].append(x)
            tr_data['y'].append(y)
            tr_data['round_color'].append(round_color(node.round[u]))
            tr_data['round'].append(node.round[u])
            tr_data['hash'].append(b64encode(u).decode('utf8'))
            tr_data['payload'].append(ev.d)
            tr_data['time'].append(strftime("%Y-%m-%d %H:%M:%S", localtime(ev.t)))

            tr_data['idx'].append(None)
            tr_data['line_alpha'].append(None)

            if ev.p:
                links_data['x0'].extend((x, x))
                links_data['y0'].extend((y, y))
                links_data['x1'].append(self.ids[node.hg[ev.p[0]].c])
                links_data['x1'].append(self.ids[node.hg[ev.p[1]].c])
                links_data['y1'].append(node.height[ev.p[0]])
                links_data['y1'].append(node.height[ev.p[1]])
                links_data['width'].extend((3, 1))

        return tr_data, links_data

    def animate(self):
        r = randrange(len(self.main_its))
        print('working node: %i, event number: %i' % (r, self.i))
        self.i += 1
        new = next(self.main_its[r])
        if r == self.active:
            tr, links = self.extract_data(self.nodes[r], new, len(self.tr_src.data['x']))
            self.tr_src.stream(tr)
            self.links_src.stream(links)
            for u, j in tuple(self.tbd.items()):
                self.tr_src.data['line_alpha'][j] = 1 if self.nodes[r].famous.get(u) else 0
                if u in self.nodes[r].idx:
                    self.tr_src.data['round_color'][j] = idx_color(self.nodes[r].idx[u])
                self.tr_src.data['idx'][j] = self.nodes[r].idx.get(u)
                if u in self.nodes[r].idx and u in self.nodes[r].famous:
                    del self.tbd[u]
                    print('updated')
            self.tr_src.trigger('data', None, self.tr_src.data)


App(int(sys.argv[1]))