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| 1 | + | import threading |
| 2 | import json | |
| 3 | import fileinput | |
| 4 | import os | |
| 5 | import sys | |
| 6 | import time | |
| 7 | import re | |
| 8 | from collections import defaultdict | |
| 9 | class Indexer (): | |
| 10 | dictionary = defaultdict(list) | |
| 11 | categories = defaultdict(list) | |
| 12 | users = defaultdict(list) | |
| 13 | tweets = [] | |
| 14 | tweet_counts = 0 | |
| 15 | tweets_dir = '../data/tweets/'; | |
| 16 | categories_dir = '../data/categories/'; | |
| 17 | users_dir = '../data/users/'; | |
| 18 | dictionary_dir = '../data/dictionary/'; | |
| 19 | ||
| 20 | def run (self): | |
| 21 | self.index() | |
| 22 | def index(self): | |
| 23 | for line in fileinput.input(['../data/raw_tweets.txt']): | |
| 24 | if self.tweet_counts % 1000 == 0: | |
| 25 | self.save_data(self.users, self.users_dir) | |
| 26 | self.save_data(self.categories, self.categories_dir) | |
| 27 | self.save_data(self.dictionary, self.dictionary_dir) | |
| 28 | self.tweet_counts += 1 | |
| 29 | tweet_array = line.split(",")
| |
| 30 | ||
| 31 | #get rid of follower data | |
| 32 | tweet_array.pop(-1) | |
| 33 | tweet_array.pop(-1) | |
| 34 | user_name = tweet_array.pop(-1) | |
| 35 | display_user_name = user_name | |
| 36 | user_name = user_name.lower() | |
| 37 | ||
| 38 | #get rid of timestamp | |
| 39 | tweet_array.pop(0) | |
| 40 | ||
| 41 | #put the tweet back together, incase the actual message contained commas | |
| 42 | tweet = ','.join(tweet_array) | |
| 43 | ||
| 44 | tweet_id = self.tweet_counts | |
| 45 | self.users[user_name].append(tweet_id) | |
| 46 | clean_tweet = re.compile('[^a-zA-Z0-9@#]').sub(' ', tweet)
| |
| 47 | tweet = self.tokenize_line(tweet_id, clean_tweet) | |
| 48 | tweet = (user_name + '%' + tweet).replace(user_name, '<a href = "/index.php?query=' + user_name + '&type=u">' + display_user_name + '</a>'); | |
| 49 | self.tweets.append(tweet) | |
| 50 | ||
| 51 | def tokenize_line(self, tweet_id, tweet): | |
| 52 | tokens = tweet.split(" ")
| |
| 53 | for token in tokens: | |
| 54 | if len(token) == 0: | |
| 55 | continue | |
| 56 | display_token = token | |
| 57 | #index the token after putting it to lower case, this ensures, that case-conflicts don't emerge when fetching said token | |
| 58 | token = token.lower() | |
| 59 | file_name = self.get_file_name(token, 0, 1) | |
| 60 | ||
| 61 | #replace the category with a link to the categories | |
| 62 | if token[0] == "#": | |
| 63 | token = token[1:len(token)-1] | |
| 64 | tweet = tweet.replace(display_token, '<a href = "/index.php?query=' + token + '&type=c">' + display_token + '</a>'); | |
| 65 | self.categories[token].append(tweet_id) | |
| 66 | ||
| 67 | #make the username clickable | |
| 68 | elif token[0] == "@": | |
| 69 | token_display = token | |
| 70 | token = token[1:len(token)-1] | |
| 71 | tweet = tweet.replace(display_token, '<a href = "/index.php?query=' + token + '&type=u">' + display_token + '</a>'); | |
| 72 | ||
| 73 | self.dictionary[token].append(tweet_id) | |
| 74 | return tweet | |
| 75 | ||
| 76 | def get_file_name(self, token, lower, upper): | |
| 77 | result = "" | |
| 78 | upper += 1 | |
| 79 | if len(token) >= (upper): | |
| 80 | result = token[lower:upper] | |
| 81 | elif len(token) >= (lower): | |
| 82 | result = token[lower] | |
| 83 | return result | |
| 84 | ||
| 85 | #saves the hash content to the given file after | |
| 86 | #loading any existing data | |
| 87 | def save_data(self, hash, directory): | |
| 88 | for token in hash: | |
| 89 | if len(token) == 0: | |
| 90 | continue | |
| 91 | id_list = hash[token] | |
| 92 | file_name = self.get_file_name(token, 0, 1) | |
| 93 | file_path = directory + file_name + '.txt' | |
| 94 | file = self.open_file(file_path) | |
| 95 | existing_tweets = self.read_file(file) | |
| 96 | if existing_tweets.get(token, False) == False: | |
| 97 | existing_tweets[token] = [] | |
| 98 | existing_tweets[token].extend(id_list) | |
| 99 | sorted(existing_tweets[token]) | |
| 100 | file.close() | |
| 101 | ||
| 102 | #open file handler to write | |
| 103 | file = open(file_path, 'w') | |
| 104 | file.write(json.dumps(existing_tweets)) | |
| 105 | file.close() | |
| 106 | hash = defaultdict(list) | |
| 107 | ||
| 108 | #returns a file object for a file. if it doesn't exist, it makes it | |
| 109 | def open_file(self, file): | |
| 110 | if os.path.exists(file): | |
| 111 | return open(file, 'r') | |
| 112 | open(file, 'w+').close() | |
| 113 | return open(file, 'r') | |
| 114 | ||
| 115 | def read_file(self, file): | |
| 116 | file_contents = file.read() | |
| 117 | if len(file_contents) == 0: | |
| 118 | return {}
| |
| 119 | else: | |
| 120 | return json.loads(file_contents) | |
| 121 | ||
| 122 | ||
| 123 | ||
| 124 | def main(): | |
| 125 | i = Indexer() | |
| 126 | start = time.time() | |
| 127 | i.index() | |
| 128 | end = time.time() | |
| 129 | elapsed= end - start | |
| 130 | print (elapsed) | |
| 131 | ||
| 132 | if __name__ == "__main__": | |
| 133 | main() |