app.py

import collections
import os
from datetime import datetime, timedelta
import json
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
from urllib.parse import parse_qs, urlparse

from huggingface_hub import list_datasets, set_access_token, HfFolder
from datasets import load_dataset, DatasetDict, Dataset
import numpy as np

HF_TOKEN = os.environ['HF_TOKEN']
set_access_token(HF_TOKEN)
HfFolder.save_token(HF_TOKEN)


datasets = {
    "stars": load_dataset("open-source-metrics/stars").sort('dates'),
    "issues": load_dataset("open-source-metrics/issues").sort('dates'),
    "pip": load_dataset("open-source-metrics/pip").sort('day')
}

val = 0


def _range(e):
    global val
    e['range'] = val
    val += 1

    current_date = datetime.strptime(e['dates'], "%Y-%m-%dT%H:%M:%SZ")
    first_date = datetime.fromtimestamp(1)
    week = abs(current_date - first_date).days // 7
    e['week'] = week

    return e


def _ignore_org_members(e):
    global val
    e['range_non_org'] = val

    if e['type']['authorAssociation'] != 'MEMBER':
        val += 1

    return e

stars = {}
for k, v in datasets['stars'].items():
    stars[k] = v.map(_range)
    val = 0

issues = {}
for k, v in datasets['issues'].items():
    issues[k] = v.map(_range)
    val = 0
    issues[k] = issues[k].map(_ignore_org_members)
    val = 0

datasets['stars'] = DatasetDict(**stars)
datasets['issues'] = DatasetDict(**issues)


# datasets = {
#     k1: DatasetDict({
#         k2: v2.select(range(0, len(v2), max(1, int(len(v2) / 1000)))) for k2, v2 in v1.items()
#     }) for k1, v1 in datasets.items()
# }


def link_values(library_names, returned_values):
    previous_values = {library_name: None for library_name in library_names}
    for library_name in library_names:
        for i in returned_values.keys():
            if library_name not in returned_values[i]:
                returned_values[i][library_name] = previous_values[library_name]
            else:
                previous_values[library_name] = returned_values[i][library_name]

    return returned_values


def running_mean(x, N, total_length=-1):
    cumsum = np.cumsum(np.insert(x, 0, 0))
    to_pad = max(total_length - len(cumsum), 0)
    return np.pad(cumsum[N:] - cumsum[:-N], (to_pad, 0)) / float(N)


def parse_name_and_options(path):
    url = urlparse(path)
    query = parse_qs(url.query)
    library_names = query.get("input", None)[0]
    library_names = library_names.split(',')
    options = query.get("options", None)[0]
    options = options.split(',')

    return library_names, options


class RequestHandler(SimpleHTTPRequestHandler):
    def do_GET(self):
        print(self.path)
        if self.path == "/":
            self.path = "index.html"

            return SimpleHTTPRequestHandler.do_GET(self)

        if self.path.startswith("/initialize"):
            dataset_keys = {k: set(v.keys()) for k, v in datasets.items()}
            dataset_with_most_splits = max([d for d in dataset_keys.values()], key=len)
            warnings = []

            for k, v in dataset_keys.items():
                if len(v) < len(dataset_with_most_splits):
                    warnings.extend(f"The {k} dataset does not contain all splits. Missing: {dataset_with_most_splits - v}")

            # TODO: Send and display warnings
            dataset_with_most_splits = list(dataset_with_most_splits)
            dataset_with_most_splits.sort()

            return self.response(list(dataset_with_most_splits))

        if self.path.startswith("/retrievePipInstalls"):
            library_names, options = parse_name_and_options(self.path)

            if '1' in options:
                returned_values = {}
                for library_name in library_names:
                    for i in datasets['pip'][library_name]:
                        if i['day'] in returned_values:
                            returned_values[i['day']]['Cumulated'] += i['num_downloads']
                        else:
                            returned_values[i['day']] = {'Cumulated': i['num_downloads']}

                library_names = ['Cumulated']

            else:
                returned_values = {}
                for library_name in library_names:
                    for i in datasets['pip'][library_name]:
                        if i['day'] in returned_values:
                            returned_values[i['day']][library_name] = i['num_downloads']
                        else:
                            returned_values[i['day']] = {library_name: i['num_downloads']}

                for library_name in library_names:
                    for i in returned_values.keys():
                        if library_name not in returned_values[i]:
                            returned_values[i][library_name] = None

            returned_values = collections.OrderedDict(sorted(returned_values.items()))
            output = {l: [k[l] for k in returned_values.values()] for l in library_names}
            output['day'] = list(returned_values.keys())

            return self.response(output)

        if self.path.startswith("/retrieveStars"):
            library_names, options = parse_name_and_options(self.path)
            returned_values = {}
            dataset_dict = datasets['stars']
            week_over_week = '1' in options

            for library_name in library_names:
                dataset = dataset_dict[library_name]

                last_value = 0
                last_week = dataset[0]['week']
                for i in dataset:
                    if week_over_week and last_week == i['week']:
                        continue
                    if i['dates'] in returned_values:
                        returned_values[i['dates']][library_name] = i['range'] - last_value
                    else:
                        returned_values[i['dates']] = {library_name: i['range'] - last_value}

                    last_value = i['range'] if week_over_week else 0
                    last_week = i['week']

            returned_values = collections.OrderedDict(sorted(returned_values.items()))
            returned_values = link_values(library_names, returned_values)
            output = {l: [k[l] for k in returned_values.values()][::-1] for l in library_names}
            output['day'] = list(returned_values.keys())[::-1]

            # Trim down to a smaller number of points.
            output = {k: [v for i, v in enumerate(value) if i % max(1, int(len(value) / 100)) == 0] for k, value in output.items()}

            return self.response(output)


        if self.path.startswith("/retrieveIssues"):
            library_names, options = parse_name_and_options(self.path)

            exclude_org_members = '1' in options
            week_over_week = '2' in options

            returned_values = {}
            dataset_dict = datasets['issues']
            range_id = 'range' if not exclude_org_members else 'range_non_org'

            for library_name in library_names:
                dataset = dataset_dict[library_name]

                last_value = 0
                last_week = dataset[0]['week']
                for i in dataset:
                    if week_over_week and last_week == i['week']:
                        continue

                    if i['dates'] in returned_values:
                        returned_values[i['dates']][library_name] = i[range_id] - last_value
                    else:
                        returned_values[i['dates']] = {library_name: i[range_id] - last_value}

                    last_value = i[range_id] if week_over_week else 0
                    last_week = i['week']

            returned_values = collections.OrderedDict(sorted(returned_values.items()))
            returned_values = link_values(library_names, returned_values)
            output = {l: [k[l] for k in returned_values.values()][::-1] for l in library_names}
            output['day'] = list(returned_values.keys())[::-1]

            # Trim down to a smaller number of points.
            output = {k: [v for i, v in enumerate(value) if i % max(1, int(len(value) / 100)) == 0] for k, value in output.items()}

            return self.response(output)

        return SimpleHTTPRequestHandler.do_GET(self)

    def response(self, output):
        self.send_response(200)
        self.send_header("Content-Type", "application/json")
        self.end_headers()

        self.wfile.write(json.dumps(output).encode("utf-8"))

        return SimpleHTTPRequestHandler


server = ThreadingHTTPServer(("", 7860), RequestHandler)

print("Running on port 7860")

server.serve_forever()