Same as previous push

.gitignore

@@ -1,3 +1,5 @@
 /data/
 *.shelve
 /__pycache__/
+/test/
+merged*

indexer.py

@@ -10,7 +10,6 @@
 #Posting ---> Source of file, tf-idf score. #for now we will only use these two, as we get more complex posting will be change accordingly
 
 #Data input
-import math
 import json
 import os
 import shelve
@@ -18,7 +17,8 @@ from bs4 import BeautifulSoup
 from time import perf_counter
 import time
 import threading
-import pickle
+from threading import Lock
+import math
 
 
 #Data process
@@ -34,235 +34,196 @@ import re
 from posting import Posting
 from worker import Worker
 
+class Node():
+	index_value = ''
+	postings = list()
+
+class Index():
+	length = 0
+	index = list()
 
 class Indexer():
-	def __init__(self,restart,trimming):
+	def __init__(self,list_partials,weight,data_paths,worker_factory=Worker):
 		#Config stuffs
-		self.path = "D:/Visual Studio Workspace/CS121/assignment3/data/DEV/"
-		self.restart = restart
-		self.trimming = trimming
+		self.path = "data/DEV"
+		self.num_doc = 0
+		self.list_partials = list_partials
+		self.weight = weight
+		self.data_paths = data_paths
 		self.stemmer = PorterStemmer()
-		self.id = list()
-		# list that contains the denominator for normalization before taking the square root of it. square root will be taken during query time
-		self.normalize = list()
+		self.data_paths_lock = Lock()
+		self.list_partials_lock = Lock()
 		
-		#Shelves for index
-		#https://www3.nd.edu/~busiforc/handouts/cryptography/letterfrequencies.html
-		#https://www.irishtimes.com/news/science/how-many-numbers-begin-with-a-1-more-than-30-per-cent-1.4162466
-		#According to this will be how we split things
-		#Save #1 = ABCD + (1) ~ 18.3% of words
-		#Save #2 = EFGHIJK + (2-3)~ 27.1% of words
-		#Save #3 = LMNOPQ + (4-7) ~ 25.4% of words
-		#Save #4 = RSTUVWXYZ + (8-9)~ 29.2% of words
-		#Save #5 = Special characters
-		if os.path.exists("save_1.shelve") and restart:
-			os.remove("save_1.shelve")
-		if os.path.exists("save_2.shelve") and restart:
-			os.remove("save_2.shelve")
-		if os.path.exists("save_3.shelve") and restart:
-			os.remove("save_3.shelve")
-		if os.path.exists("save_4.shelve") and restart:
-			os.remove("save_4.shelve")
-		if os.path.exists("save_5.shelve") and restart:
-			os.remove("save_5.shelve")
+		self.workers = list()
+		self.worker_factory = worker_factory
 
 
-		self.save_1 = shelve.open("save_1.shelve")
-		self.save_1_lock = threading.Lock()
-		self.save_2 = shelve.open("save_2.shelve")
-		self.save_2_lock = threading.Lock()
-		self.save_3 = shelve.open("save_3.shelve")
-		self.save_3_lock = threading.Lock()
-		self.save_4 = shelve.open("save_4.shelve")
-		self.save_4_lock = threading.Lock()
-		self.save_5 = shelve.open("save_5.shelve")
-		self.save_5_lock = threading.Lock()
+	def start_async(self):
+		self.workers = [
+			self.worker_factory(worker_id,self)
+			for worker_id in range(8)]
+		for worker in self.workers:
+			worker.start()
 
-		print(len(list(self.save_1.keys())))
-		print(len(list(self.save_2.keys())))
-		print(len(list(self.save_3.keys())))
-		print(len(list(self.save_4.keys())))
-		print(len(list(self.save_5.keys())))
+	def start(self):
+		self.start_async()
+		self.join()
 
-	def get_url_id(self, url):
-		return self.id.index(url)
-
-	def save_index(self,word,posting):
-		cur_save = self.get_save_file(word)
-		lock = self.get_save_lock(word)
-		lock.acquire()
-		shelve_list = list()
-		try:
-			shelve_list = cur_save[word]
-			shelve_list.append(posting)
-			tic = perf_counter()
-			# Sort by url id to help with query search
-			shelve_list.sort(key=lambda x: x.url)
-			# shelve_list.sort(key=lambda x: x.tf_idf, reverse = True)
-			toc = perf_counter()
-			if toc - tic > 1 :
-				print("Took " + str(toc - tic) + "seconds to sort shelve list !")
-			cur_save.sync()
-			lock.release()
-		except:
-			shelve_list.append(posting)
-			cur_save[word] = shelve_list
-			cur_save.sync()
-			lock.release()
-
-	def get_save_file(self,word):
-		#return the correct save depending on the starting letter of word
-		word_lower = word.lower()
-
-		if re.match(r"^[a-d0-1].*",word_lower):
-			return self.save_1
-		elif re.match(r"^[e-k2-3].*",word_lower):
-			return self.save_2
-		elif re.match(r"^[l-q4-7].*",word_lower):
-			return self.save_3
-		elif re.match(r"^[r-z8-9].*",word_lower):
-			return self.save_4
-		else:
-			print(word)
-			print("You have somehow went beyond the magic")
-			return self.save_5
-
-	def get_save_lock(self,word):
-		word_lower = word.lower()
-		if re.match(r"^[a-d0-1].*",word_lower):
-			return self.save_1_lock
-		elif re.match(r"^[e-k2-3].*",word_lower):
-			return self.save_2_lock
-		elif re.match(r"^[l-q4-7].*",word_lower):
-			return self.save_3_lock
-		elif re.match(r"^[r-z8-9].*",word_lower):
-			return self.save_4_lock
-		else:
-			print(word)
-			print("You have somehow went beyond the magic")
-			return self.save_5_lock.acquire()
-	# I have a test file (mytest.py) with pandas but couldn't figure out how to grab just a single cell.
-	# so I came up with this, if anyone knows how to get a single cell and can explain it to
-	# me I would love to know, as I think that method might be quicker, maybe, idk it like
-	# 4am
-	# https://stackoverflow.com/questions/34449127/sklearn-tfidf-transformer-how-to-get-tf-idf-values-of-given-words-in-documen
-
-	# removed parameter "word" since it wasn't used
-	# TODO: Add important words scaling
-	def get_tf_idf(self, words):
-		# words = [whole text] one element list
-		# return the score
-		try:
-			tfidf = TfidfVectorizer(ngram_range=(1,1)) # ngram_range is range of n-values for different n-grams to be extracted (1,3) gets unigrams, bigrams, trigrams
-			tfidf_matrix = tfidf.fit_transform(words)  # fit trains the model, transform creates matrix
-			df = pd.DataFrame(tfidf_matrix.toarray(), columns = tfidf.get_feature_names_out()) # store value of matrix to associated word/n-gram
-			#return(df.iloc[0][''.join(word)]) #used for finding single word in dataset
-			data = df.to_dict() # transform dataframe to dict *could be expensive the larger the data gets, tested on ~1000 word doc and took 0.002 secs to run
-			return data			# returns the dict of words/n-grams with tf-idf
-			#print(df)			# debugging 
-		except: 		
-			print("Error in tf_idf!")
-			return -1
-	
-	def tf(self, text, url):
-		# tf
-		tokens = {}
-		split = text.split(" ")
-		# loop using index to keep track of position
-		for i in range(len(split)):
-			if split[i] not in tokens:
-				tokens[split[i]] = Posting(self.get_url_id(url), 1, i)
-			else:
-				tokens[split[i]].rtf += 1
-				tokens[split[i]].tf = (1 + math.log(tokens[split[i]].rtf))
-				tokens[split[i]].positions.append(i)
-		return tokens
-
-	# Does the idf part of the tfidf
-	def tfidf(self, current_save):
-		for token, postings in current_save.items():
-			for p in postings:
-				p.tfidf = p.tf * math.log(len(self.id)/len(postings))
-				self.normalize[p.url] += p.tfidf**2
+	def join(self):
+		for worker in self.workers:
+			worker.join()
 
 
-	def get_data(self):
+	def get_postings(self,index):
+		merged_index_index = open("merged_index.index" ,'r')
+		merged_index = open("merged_index.full",'r')
+		merged_index_index.seek(0,0)
+		json_value = merged_index_index.readline()
+		data = json.loads(json_value)
+		index_index = dict(data['index'])
+		to_seek = index_index[index]
+		merged_index.seek(to_seek,0)
+		json_value = merged_index.readline()
+		data = json.loads(json_value)
+		return data['postings']
 
-		num_threads = 8
-		threads = list()
+	def set_weight(self):
+		weight_file = open('docs.weight','w')
+		jsonStr =json.dumps(self.weight, default=lambda o: o.__dict__,sort_keys=False)
+		weight_file.write(jsonStr)
+		weight_file.close()
 
+	def get_weight(self,doc_id):
+		weight = open('docs.weight','r')
+		weight.seek(0,0)
+		json_value = weight.readline()
+		data = json.loads(json_value)
+		return data[doc_id]
+
+	def get_data_path(self):
 		for directory in os.listdir(self.path):
 			for file in os.listdir(self.path + "/" + directory + "/"):
-				#Actual files here
-				#JSON["url"] = url of crawled page, ignore fragments
-				#JSON["content"] = actual HTML
-				#JSON["encoding"] = ENCODING
-				index = 0
-				while True:
-					file_path = self.path + "" + directory + "/"+file
-					# Add url to id here so that there isn't any problems when worker is multi-threaded
+				self.data_paths.append("data/DEV/" + directory + "/"+file)
+		self.num_doc = len(self.data_paths)
 
-					tic = perf_counter()
-					load = open(file_path)
-					data = json.load(load)
-					if data["url"] not in self.id:
-						self.id.append(data["url"])
-					toc = perf_counter()
-					print("Took " + str(toc - tic) + " seconds to save url to self.id")
-						
-					if len(threads) < num_threads:
-						thread = Worker(self,file_path)
-						threads.append(thread)
-						thread.start()
-						break
-					else:
-						if not threads[index].is_alive():
-							threads[index] = Worker(self,file_path)
-							threads[index].start()
-							break
-						else:
-							index = index + 1
-							if(index >= num_threads):
-								index = 0
-							time.sleep(.1)
-		# Make a list the size of the corpus to keep track of document scores 
-		self.normalize = [0] * len(self.id)
+	def get_next_file(self):
+		self.data_paths_lock.acquire()
+		try:
+			holder = self.data_paths.pop()
+			self.data_paths_lock.release()
+			return holder
+		except IndexError:
+			self.data_paths_lock.release()
+			return None
+	
+	def add_partial_index(self,partial_index):
+		self.list_partials_lock.acquire()
+		self.list_partials.append(partial_index)
+		self.list_partials_lock.release()
 
-		# These last few function calls calculates idf and finalizes tf-idf weighting for each index
-		self.tfidf(self.save_1)
-		self.tfidf(self.save_2)
-		self.tfidf(self.save_3)
-		self.tfidf(self.save_4)
-		self.tfidf(self.save_5)
-		
-		# Creates a pickle file that is a list of urls where the index of the url is the id that the posting refers to.
-		p = os.path.dirname(os.path.abspath(__file__))
-		my_filename = os.path.join(p, "urlID.pkl")
-		if os.path.exists(my_filename):
-			os.remove(my_filename)
-		# Creates file and closes it
-		f = open(my_filename, "wb")
-		pickle.dump(self.id, f)
-		f.close()
-
-		# Creates a pickle file that will contain the denominator (before the square root) for normalizing wt
-		p = os.path.dirname(os.path.abspath(__file__))
-		my_filename = os.path.join(p, "normalize.pkl")
-		if os.path.exists(my_filename):
-			os.remove(my_filename)
-		# Creates file and closes it
-		f = open(my_filename, "wb")
-		pickle.dump(self.normalize, f)
-		f.close()
 	#Found 55770 documents
 	#
+	#getting important tokens
 
-				#getting important tokens
+	def merge(self):
+		partial_files = list()
+		partial_index_files = list()
+		parital_index_indices = list()
+		
+		num_indices = len(self.list_partials)
+
+		#Full Index.Index and Length
+		full_index = Index()
+		full_index.index = list()
+		full_index.length = 0
+
+		for partial_index in self.list_partials:
+			file = open("temp/" + partial_index+'.partial','r')
+			partial_files.append(file)
+			index = open("temp/" + partial_index+'.index','r')
+			partial_index_files.append(index)
+
+		for partial_index_file in partial_index_files:
+			partial_index_file.seek(0,0)
+			parital_index_indices.append(json.loads(partial_index_file.readline()))
+
+		#Start all indexes at 0
+		for partial_file in partial_files:
+			partial_file.seek(0,0)
+
+		pointers = [0]*num_indices
+		merged_index = open("merged_index.full",'w')
+		merged_index_index = open("merged_index.index" ,'w')
+
+		while(True):
+
+			#Get all values from all indices to find min
+			value = None
+			values = list()
+			for i in range(num_indices):
+				if pointers[i] < parital_index_indices[i]['length']:
+					values.append(parital_index_indices[i]['index'][pointers[i]][0])
 				
-						
+			if(len(values) == 0):
+				break
+			value = min(values)
+
+			#Get data from the min value of all indices if exists then save to mergedIndex
+			if value == None:
+				print("I have crashed some how by not getting min value")
+				break
+
+			node = Node()
+			node.index_value = value
+			for i in range(num_indices):
+				if pointers[i] < parital_index_indices[i]['length'] and parital_index_indices[i]['index'][pointers[i]][0] == value:
+					to_seek = parital_index_indices[i]['index'][pointers[i]][1]
+					partial_files[i].seek(to_seek,0)
+					json_value = partial_files[i].readline()
+					temp_node = json.loads(json_value)
+					node.postings = node.postings + temp_node['postings']
+					pointers[i] = pointers[i] + 1
+			#Change postings here with tf*idf idf = log (n/df(t)) 
+			node.postings.sort(key=lambda y:y['doc_id'])
+			for posting in node.postings:
+				posting['tf_idf'] = posting['tf_raw']*math.log(self.num_doc/len(node.postings))
+			full_index.index.append((value,merged_index.tell()))
+			full_index.length = full_index.length + 1
+			jsonStr = json.dumps(node,default=lambda o: o.__dict__,sort_keys=False)
+			merged_index.write(jsonStr + '\n')
+
+		full_index.index.sort(key=lambda y:y[0])
+		jsonStr =json.dumps(full_index, default=lambda o: o.__dict__,sort_keys=False)
+		merged_index_index.write(jsonStr)
+
+		for partial_index in self.list_partials:
+			os.remove("temp/" + partial_index+'.partial')
+			os.remove("temp/" + partial_index+'.index')
+
+		merged_index_index.close()
+		merged_index.close()
+
+
 def main():
-	indexer = Indexer(True,0)
-	indexer.get_data()
+	indexer = Indexer(list(),dict(),list())
+	indexer.get_data_path()
+	print("We have " + str(len(indexer.data_paths)) + " documents to go through !" )
+	indexer.start()
+	indexer.merge()
+	print("Finished merging into 1 big happy family")
+	indexer.set_weight()
+
+	tic = time.perf_counter()
+	indexer.get_postings('artifici')
+	toc = time.perf_counter()
+	print(f"Took {toc - tic:0.4f} seconds to get postings for artifici")
+	tic = time.perf_counter()
+	indexer.get_weight('00ba3af6a00b7cfb4928e5d234342c5dc46b4e31714d4a8f315a2dd4d8e49860')
+	print(f"Took {toc - tic:0.4f} seconds to get weight for some random page ")
+	toc = time.perf_counter()
+
+	
+
 
 if __name__ == "__main__":
 	main()

mytest.py

@@ -4,6 +4,7 @@ from sklearn.feature_extraction.text import TfidfVectorizer
 import pandas as pd
 import numpy as np
 
+
 #tf_idf
 #words = whole text
 #word the word we finding the score for
@@ -19,13 +20,12 @@ words = ['this is the first document '
 doc1 = ["I can't fucking take it any more. Among Us has singlehandedly ruined my life. The other day my teacher was teaching us Greek Mythology and he mentioned a pegasus and I immediately thought 'Pegasus? more like Mega Sus!!!!' and I've never wanted to kms more. I can't look at a vent without breaking down and fucking crying. I can't eat pasta without thinking 'IMPASTA??? THATS PRETTY SUS!!!!' Skit 4 by Kanye West. The lyrics ruined me. A Mongoose, or the 25th island of greece. The scientific name for pig. I can't fucking take it anymore. Please fucking end my suffering."]
 doc2 = ["Anyways, um... I bought a whole bunch of shungite rocks, do you know what shungite is? Anybody know what shungite is? No, not Suge Knight, I think he's locked up in prison. I'm talkin' shungite. Anyways, it's a two billion year-old like, rock stone that protects against frequencies and unwanted frequencies that may be traveling in the air. That's my story, I bought a whole bunch of stuff. Put 'em around the la casa. Little pyramids, stuff like that."]
 word = 'life'
-
 try:
-    tfidf = TfidfVectorizer()
-    tfidf_matrix = tfidf.fit_transform(doc1)
+    tfidf = TfidfVectorizer(ngram_range=(3,3)) # ngram_range is range of n-values for different n-grams to be extracted (1,3) gets unigrams, bigrams, trigrams
+    tfidf_matrix = tfidf.fit_transform(words)
     df = pd.DataFrame(tfidf_matrix.toarray(), columns = tfidf.get_feature_names_out())
-    print(df.iloc[0][''.join(word)])
-    #print(df)
+    #print(df.iloc[0][''.join(word)])
+    data = df.to_dict()
 except KeyError: # word does not exist 
     print(-1)
 

posting.py

@@ -1,9 +1,17 @@
 #Posting class for indexer, will probably be more complex as we keep adding crap to it
 
 class Posting():
-	def __init__(self, url, rtf, position):
+	def __init__(self,doc_id,url,tf_raw,tf_idf,positionals):
+		self.doc_id = doc_id
 		self.url = url
-		self.rtf = rtf
-		self.tf = 0
-		self.tfidf = 0
-		self.positions = [position]
+		self.tf_raw = tf_raw
+		self.tf_idf = tf_idf
+		self.positionals = positionals
+	def __repr__(self):
+		return "Doc_id:" + str(self.doc_id) + " URL:" + self.url + " tf_raw:" + str(self.tf_raw) + " tf_idf:" + str(self.tf_idf) + " positionals:" + str(self.positionals)
+	def __str__(self):
+		return "Doc_id:" + str(self.doc_id) + " URL:" + self.url + " tf_raw:" + str(self.tf_raw) + " tf_idf:" + str(self.tf_idf) + " positionals:" + str(self.positionals)
+
+	def comparator(self):
+		#Some custom comparator for sorting postings later
+		pass

stemmer.py

@@ -1,18 +0,0 @@
-#Multiple implementation of stemming here please
-class Stemmer():
-
-	def __init__(self,mode, data):
-		#Different type of stemmer = different modes
-		self.mode = mode
-		self.data = data
-
-	def stem(self):
-		#Do stuff here
-		if(self.mode == 0):
-			#Do stemmer 1
-			return #stemmed data
-		#....
-
-	def #name of stemmer 1
-
-	def #name of stemmer 2

tempCodeRunnerFile.py

@@ -1,2 +0,0 @@
-
-    for postings in l_posting:

test.py

@@ -1,17 +1,13 @@
-import re
+from threading import Thread
+import json
 import os
+import shelve
+import sys
+from bs4 import BeautifulSoup
+from time import perf_counter
+from nltk.stem import PorterStemmer
+import nltk
+import time
+from posting import Posting
 
-for i in range(99):
-	word_lower = chr(i % 26 + 97) + chr(i % 26 + 97 + 1)
-	print(word_lower)
-	if re.match(r"^[a-d1-1].*",word_lower):
-		print("SAVE 1")
-	elif re.match(r"^[e-k2-3].*",word_lower):
-		print("SAVE 2")
-	elif re.match(r"^[l-q4-7].*",word_lower):
-		print("SAVE 3")
-	elif re.match(r"^[r-z8-9].*",word_lower):
-		print("SAVE 4")
-
-path = "data/DEV/"
-print(os.listdir(path))
+import re

test1.py

@@ -1,28 +0,0 @@
-import json
-import os
-import shelve
-from bs4 import BeautifulSoup
-from time import perf_counter
-import time
-import threading
-import pickle
-
-
-#Data process
-from nltk.tokenize import word_tokenize
-from nltk.stem import PorterStemmer
-from sklearn.feature_extraction.text import TfidfVectorizer
-import pandas as pd
-import numpy as np
-from porter2stemmer import Porter2Stemmer
-
-import re
-
-save_1 = shelve.open("save_1.shelve")
-save_2 = shelve.open("save_2.shelve")
-save_3 = shelve.open("save_3.shelve")
-save_4 = shelve.open("save_4.shelve")
-save_5 = shelve.open("save_5.shelve")
-
-key = list(save_1.keys())
-print(key)

test_merge.py

@@ -0,0 +1,116 @@
+import json
+from posting import Posting
+import math
+import sys
+import random
+from nltk.corpus import words
+random_list = [1,2,3,4,5,6,7,8,9,10]
+
+
+test_data = words.words()
+random.shuffle(test_data)
+
+
+def random_posting(id):
+	return Posting(id,random.choice(random_list),random.choice(random_list),[random.choice(random_list),random.choice(random_list),random.choice(random_list),random.choice(random_list),
+	random.choice(random_list),random.choice(random_list),random.choice(random_list),random.choice(random_list)])
+
+class Node():
+	index_value = 'Something'
+	postings = list()
+
+class Index():
+	length = 0
+	index = list()
+
+def random_partial_index(name):
+	part_index = Index()
+	part_index.index = list()
+	part_index.length = 0
+	with open(name +'.partial', 'w') as f:
+		for i in range(1000):
+
+			node1 = Node()
+			node1.index_value = random.choice(test_data).lower()
+			node1.postings = list()
+			for i in range(10):
+				node1.postings.append(random_posting(i))
+
+			jsonStr = json.dumps(node1, default=lambda o: o.__dict__,sort_keys=False)
+			
+			part_index.index.append((node1.index_value,f.tell()))
+			f.write(jsonStr + '\n')
+			part_index.length = part_index.length + 1
+
+	part_index.index.sort(key=lambda y:y[0])
+	jsonStr =json.dumps(part_index, default=lambda o: o.__dict__,sort_keys=False)
+	with open(name + '.index','w') as f:
+		f.write(jsonStr)
+
+def merge(partial_indices):
+	partial_files = list()
+	partial_index_files = list()
+	parital_index_indices = list()
+	merged_index = open("merged_index.full",'w')
+	num_indices = len(partial_indices)
+
+	#Full Index.Index and Length
+	full_index = Index()
+	full_index.index = list()
+	full_index.length = 0
+
+	for partial_index in partial_indices:
+		file = open(partial_index+'.partial','r')
+		partial_files.append(file)
+		index = open(partial_index+'.index','r')
+		partial_index_files.append(index)
+
+	for partial_index_file in partial_index_files:
+		partial_index_file.seek(0,0)
+		parital_index_indices.append(json.loads(partial_index_file.readline()))
+
+	#Start all indexes at 0
+	for partial_file in partial_files:
+		partial_file.seek(0,0)
+
+	pointers = [0]*num_indices
+
+	while(True):
+
+		#Get all values from all indices to find min
+		value = None
+		values = list()
+		for i in range(num_indices):
+			if pointers[i] < parital_index_indices[i]['length']:
+				values.append(parital_index_indices[i]['index'][pointers[i]][0])
+			
+		if(len(values) == 0):
+			break
+		value = min(values)
+
+		#Get data from the min value of all indices if exists then save to mergedIndex
+		if value == None:
+			print("I have crashed some how by not getting min value")
+			break
+
+		node = Node()
+		node.index_value = value
+		for i in range(num_indices):
+			if pointers[i] < parital_index_indices[i]['length'] and parital_index_indices[i]['index'][pointers[i]][0] == value:
+				to_seek = parital_index_indices[i]['index'][pointers[i]][1]
+				partial_files[i].seek(to_seek,0)
+				json_value = partial_files[i].readline()
+				temp_node = json.loads(json_value)
+				node.postings = node.postings + temp_node['postings']
+				pointers[i] = pointers[i] + 1
+		
+		node.postings.sort(key=lambda y:y['doc_id'])
+		full_index.index.append((value,merged_index.tell()))
+		full_index.length = full_index.length + 1
+		jsonStr = json.dumps(node,default=lambda o: o.__dict__,sort_keys=False)
+		merged_index.write(jsonStr + '\n')
+
+	full_index.index.sort(key=lambda y:y[0])
+	jsonStr =json.dumps(full_index, default=lambda o: o.__dict__,sort_keys=False)
+	with open("merged_index.index" ,'w') as f:
+		f.write(jsonStr)

worker.py

@@ -1,64 +1,137 @@
 from threading import Thread
 import json
 import os
-import shelve
-from bs4 import BeautifulSoup
-from time import perf_counter
-import time
-import pickle
 
+from bs4 import BeautifulSoup
 import re
 
 
 #Data process
 from nltk.tokenize import word_tokenize
 from nltk.stem import PorterStemmer
-from sklearn.feature_extraction.text import TfidfVectorizer
-import pandas as pd
-import numpy as np
-from collections import Counter
 
 from posting import Posting
 
+import math
 
 import sys
 
+class Node():
+	index_value = ''
+	postings = list()
+
+class Index():
+	length = 0
+	index = list()
+
 class Worker(Thread):
-	def __init__(self,indexer,target):
-		self.file = target
+	def __init__(self,worker_id,indexer):
 		self.indexer = indexer
+		self.stemmer = PorterStemmer()
+		self.worker_id = worker_id
+		self.num_partial = 0
+		self.index = dict()
 		super().__init__(daemon=True)
 
-	def run(self):
-		print("Target: " + str(self.file))
-		ticker = perf_counter()
-		file_load = open(self.file)
-		data = json.load(file_load)
-		soup = BeautifulSoup(data["content"],features="lxml")
-		# Gets a cleaner version text comparative to soup.get_text()
-		tic = perf_counter()
-		clean_text = ' '.join(soup.stripped_strings)
-		# Looks for large white space, tabbed space, and other forms of spacing and removes it
-		# Regex expression matches for space characters excluding a single space or words
-		clean_text = re.sub(r'\s[^ \w]', '', clean_text)
-		# Tokenizes text and joins it back into an entire string. Make sure it is an entire string is essential for get_tf_idf to work as intended
-		clean_text = " ".join([i for i in clean_text.split() if i != "" and re.fullmatch('[A-Za-z0-9]+', i)])
-		# Stems tokenized text
-		clean_text = " ".join([self.indexer.stemmer.stem(i) for i in clean_text.split()])
-		# Put clean_text as an element in a list because get_tf_idf workers properly with single element lists
-		x = [clean_text]
-		toc = perf_counter()
-		print("Took " + str(toc - tic) + " seconds to create clean text")
-		# ngrams is a dict
-		# structure looks like {ngram : {0: tf-idf score}}
-		ngrams = self.indexer.get_tf_idf(x)
-		if ngrams != -1:
-			tic = perf_counter()
-			for ngram, posting in ngrams.items():
-				self.indexer.save_index(ngram, posting)
-			toc = perf_counter()
-			print("Took " + str(toc - tic) + " seconds to save ngram")
-			
-			tocker = perf_counter()
-			print("Took " + str(tocker - ticker) + " seconds to work")
+	def dump(self):
+		part_index = Index()
+		part_index.length = 0
+		part_index.index = list()
 
+		cur_partial_index_str = "temp/" + str(self.worker_id) + "_" + str(self.num_partial) + '.partial'
+		cur_partial_index_index_str = "temp/" +  str(self.worker_id) + "_" + str(self.num_partial) + '.index'
+
+
+		cur_partial_index = open(cur_partial_index_str,'w')
+		cur_partial_index_index = open(cur_partial_index_index_str,'w')
+
+		for key in self.index:
+			node = Node()
+			node.index_value = key
+			node.postings = self.index[key]
+
+			jsonStr = json.dumps(node, default=lambda o: o.__dict__,sort_keys=False)
+
+			part_index.index.append((node.index_value,cur_partial_index.tell()))
+			cur_partial_index.write(jsonStr + '\n')
+			part_index.length = part_index.length + 1
+
+		part_index.index.sort(key=lambda y:y[0])
+		jsonStr =json.dumps(part_index, default=lambda o: o.__dict__,sort_keys=False)
+		cur_partial_index_index.write(jsonStr)
+
+		self.indexer.add_partial_index(str(self.worker_id) + "_" + str(self.num_partial))
+		self.num_partial = self.num_partial + 1
+		self.index.clear()
+
+
+	def run(self):
+		while True:
+			target = self.indexer.get_next_file()
+			if not target:
+				self.dump()
+				print("Worker " + str(self.worker_id) + " died")
+				break
+			file_load = open(target)
+			data = json.load(file_load)
+			soup = BeautifulSoup(data["content"],features="lxml")
+			doc_id = target[target.rfind('/')+1:-5]
+			url = data['url']
+			print("Worker " + str(self.worker_id) + " working on " + url)
+			important = {'b' : [], 'h1' : [], 'h2' : [], 'h3' : [], 'title' : []}
+			for key_words in important.keys():
+				for i in soup.findAll(key_words):
+					for word in word_tokenize(i.text):
+						important[key_words].append(self.stemmer.stem(word))
+
+			# Gets a cleaner version text comparative to soup.get_text()
+			clean_text = ' '.join(soup.stripped_strings)
+			# Looks for large white space, tabbed space, and other forms of spacing and removes it
+			# Regex expression matches for space characters excluding a single space or words
+			clean_text = re.sub(r'\s[^ \w]', '', clean_text)
+			# Tokenizes text and joins it back into an entire string. Make sure it is an entire string is essential for get_tf_idf to work as intended
+			clean_text = " ".join([i for i in clean_text.split() if i != "" and re.fullmatch('[A-Za-z0-9]+', i)])
+			# Stems tokenized text
+			clean_text = " ".join([self.stemmer.stem(i) for i in clean_text.split()])
+			# Put clean_text as an element in a list because get_tf_idf workers properly with single element lists
+
+			tokens = word_tokenize(clean_text)
+
+			#counter(count,positionals)
+
+			counter = dict()
+			#We calculating tf_raw, and positionals here
+			for i in range(len(tokens)):
+				word = tokens[i]
+				if word in counter:
+					counter[word][0] = counter[word][0] + 1
+					counter[word][1].append(i)
+				else:
+					counter[word] = [1,list()]
+					counter[word][1].append(i)
+
+			doc_length = len(tokens)
+			total = 0
+			for index in counter:
+				tf = counter[index][0]/doc_length
+				log_tf = 1 + math.log(tf)
+				total = total + log_tf * log_tf
+				if index in self.index:
+					postings = self.index[index]
+					postings.append(Posting(doc_id,url,tf,0,counter[index][1]))
+				else:
+					self.index[index] = list()
+					self.index[index].append(Posting(doc_id,url,tf,0,counter[index][1]))
+					self.index[index].sort(key=lambda y:y.doc_id)
+
+			self.indexer.weight[doc_id] = math.sqrt(total)
+
+			#10 Megabytes index (in Ram approx)
+			if sys.getsizeof(self.index) > 1000000:
+				self.dump()
+
+
+
+
+
+