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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include "utils.h"
#include "../libs/curl.h"
#include "../libs/string.h"
int tokenCount(char *string, char *delimiter)
{
int totalCount = 0;
if (string != NULL && delimiter != NULL)
{
char *auxString = (char *)calloc(strlen(string) + 1, sizeof(char));
strcpy(auxString, string);
char *token = strtok(auxString, delimiter);
while (token != NULL)
{
totalCount++;
token = strtok(NULL, delimiter);
}
free(auxString);
}
return totalCount;
}
char **tokenizer(char *string, char *delimiter)
{
char **tokens = NULL;
if (string != NULL && delimiter != NULL)
{
char *auxString = (char *)calloc(strlen(string) + 1, sizeof(char));
strcpy(auxString, string);
tokens = (char **)calloc(tokenCount(auxString, delimiter), sizeof(char *));
char *tempToken = strtok(auxString, delimiter);
for (int i = 0; tempToken != NULL; i++)
{
tokens[i] = (char *)calloc(strlen(tempToken) + 1, sizeof(char));
strcpy(tokens[i], tempToken);
tempToken = strtok(NULL, delimiter);
}
free(auxString);
}
else
{
tokens = (char **)calloc(1, sizeof(char));
}
return tokens;
}
void freeTokens(char **tokens, int size)
{
if ( size > 0 )
{
for ( int i = 0; i < size; i++ )
{
free(tokens[i]);
}
}
free(tokens);
}
char *queryNormalizer(char *query)
{
char *norm = NULL;
if (query != NULL && strlen(query) > 0)
{
// Declaring Initial Query Size
int querySize = strlen(query);
// Calculating Normalized Query Size Allocation
for (int i = 0; i < strlen(query); i++)
{
if (query[i] == '+' || query[i] == '#' || query[i] == '&')
{
querySize += 2;
}
}
// Allocating Memory
norm = (char *)calloc(querySize + 1, sizeof(char));
// Creating New Normalized Query
for (int i = 0, added = 0; i < strlen(query); i++)
{
switch (query[i])
{
case '+':
/* fall through */
case '#':
/* fall through */
case '&':
for (int j = 0; j < 3; j++)
{
switch (j)
{
case 0:
norm[i + j + added] = '%';
break;
case 1:
norm[i + j + added] = '2';
break;
case 2:
switch (query[i])
{
case '+':
norm[i + j + added] = 'B';
break;
case '#':
norm[i + j + added] = '3';
break;
case '&':
norm[i + j + added] = '6';
}
}
}
added += 2;
break;
case ' ':
norm[i + added] = '+';
break;
default:
norm[i + added] = query[i];
}
}
}
return norm;
}
char* extractQueryJSON(char *youtubeurl)
{
char *json = NULL;
if (youtubeurl != NULL && strlen(youtubeurl) > 0)
{
char *htmlPage = downloadPage(youtubeurl);
if ( htmlPage != NULL && strlen(htmlPage) > 0 )
{
// Setting Up Vars
char jsonVar[] = "ytInitialData", needlessHTML[] = ";</script><script", **tokens = tokenizer(htmlPage, " ");
int numberOfTokens = tokenCount(htmlPage, " ");
json = (char *)calloc(1, sizeof(char));
// Extracting JSON String
for (int i = 0, j = 1; i < numberOfTokens && strstr(tokens[j-1], needlessHTML) == NULL; i++)
{
if ( strcmp(tokens[i], jsonVar) == 0 )
{
for ( j = i + 2; strstr(tokens[j-1], needlessHTML) == NULL; j++ )
{
json = realloc(json, (strlen(json) + strlen(tokens[j]) + 2));
strcat(json, tokens[j]);
strcat(json, " ");
}
}
}
json[strlen(json) - strlen(needlessHTML)] = '\0';
freeTokens(tokens, numberOfTokens);
}
free(htmlPage);
}
return json;
}
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