Grabbed video info from JSON and created Video Structures with it

1 files changed, 196 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..b58836c
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,196 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.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;
+}
+
+int* jsonDataLimits(int tokenCount, char **tokens, char *topDelimiter, char *bottomDelimiter)
+{
+	int *limits = (int *) calloc(2, sizeof(int));
+
+	for (int i = 0; i < tokenCount + 1 && (limits[0] == 0 || limits[1] == 0); i++)
+	{
+		if (tokens[i] != NULL && strcmp(tokens[i], topDelimiter) == 0 && strcmp(tokens[i + 1], "=") == 0)
+		{
+			limits[0] = i + 2;
+		}
+		else if (tokens[i] != NULL && limits[1] == 0 && limits[0] > 0 && strstr(tokens[i], bottomDelimiter) != NULL)
+		{
+			limits[1] = i;
+		}
+	}
+
+	return limits;
+}
+
+char* extractQueryJSON(char *youtubeurl)
+{
+	char *json = NULL;
+
+	if (youtubeurl != NULL && strlen(youtubeurl) > 0)
+	{
+		// Setting Up Vars
+		char jsonVar[] = "ytInitialData", unneededHtml[] = ";</script><script", *htmlPage = downloadPage(youtubeurl), **tokens = tokenizer(htmlPage, " ");
+		int numberOfTokens = tokenCount(htmlPage, " "), *limits = jsonDataLimits(numberOfTokens, tokens, jsonVar, unneededHtml);
+		json = (char *)calloc(1, sizeof(char));
+
+		// Pre Clearing Unused Memory
+		free(htmlPage);
+
+		// Creating the JSON String
+		for (int i = limits[0]; i <= limits[1]; i++)
+		{
+			if (i < limits[1])
+			{
+				json = realloc(json, (strlen(json) + strlen(tokens[i]) + 2));
+				strcat(json, tokens[i]);
+				strcat(json, " ");
+			}
+			else
+			{
+				// Last byte doesn't need a extra space
+				json = realloc(json, (strlen(json) + strlen(tokens[i]) + 1));
+				strcat(json, tokens[i]);
+			}
+		}
+
+		json[strlen(json) - strlen(unneededHtml)] = '\0';
+
+		freeTokens(tokens, numberOfTokens);
+		free(limits);
+	}
+
+	return json;
+}