Created
October 21, 2018 16:27
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Extração de dados dos vídeos do canal do Pirula
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library(stringr) | |
library(dplyr) | |
library(RJSONIO) | |
library(magrittr) | |
isNull <- function(x){ | |
if (is.null(x)) { y <- NA } | |
else { y <- x } | |
return(y) | |
} | |
key <- "<api_key>" | |
channel <- "UCdGpd0gNn38UKwoncZd9rmA" | |
url <- paste0("https://www.googleapis.com/youtube/v3/search?", | |
"channelId=", channel, | |
"&key=",key, | |
"&part=snippet", | |
"&maxResults=1", | |
"&type=video") | |
x <- fromJSON(url, simplify = FALSE) | |
videos_n <- x$pageInfo$totalResults | |
# Primeiro Vídeo Request ---- | |
video_id <- x$items[[1]]$id$videoId | |
video_time <- substr(x$items[[1]]$snippet$publishedAt, start = 1, stop = 10) | |
video_title <- x$items[[1]]$snippet$title | |
url_video <- paste0("https://www.googleapis.com/youtube/v3/videos?", | |
"id=", video_id, | |
"&key=",key, | |
"&part=snippet,contentDetails,statistics,status") | |
y <- fromJSON(url_video, simplify = FALSE) | |
video_duration_raw <- y$items[[1]]$contentDetails$duration | |
viewCount <- isNull(y$items[[1]]$statistics$viewCount) | |
likeCount <- isNull(y$items[[1]]$statistics$likeCount) | |
dislikeCount <- isNull(y$items[[1]]$statistics$dislikeCount) | |
favoriteCount <- isNull(y$items[[1]]$statistics$favoriteCount) | |
commentCount <- isNull(y$items[[1]]$statistics$commentCount) | |
# video_duration <- duration(video_duration_raw) | |
# Geração da tabela de registro dos resultados ---- | |
dados <- data.frame(title = video_title, | |
time = video_time, | |
duration = video_duration_raw, | |
viewCount = viewCount, | |
likeCount = likeCount, | |
dislikeCount = dislikeCount, | |
favoriteCount = favoriteCount, | |
commentCount = commentCount, | |
stringsAsFactors = FALSE) | |
# Acesso aos demais vídeos ---- | |
for (i in 1:(videos_n-2)) { | |
url <- paste0("https://www.googleapis.com/youtube/v3/search?", | |
"channelId=", channel, | |
"&key=",key, | |
"&part=snippet", | |
"&maxResults=1", | |
"&pageToken=",x$nextPageToken, | |
"&type=video") | |
x <- fromJSON(url, simplify = FALSE) | |
video_id <- x$items[[1]]$id$videoId | |
video_time <- substr(x$items[[1]]$snippet$publishedAt, start = 1, stop = 10) | |
video_title <- x$items[[1]]$snippet$title | |
url_video <- paste0("https://www.googleapis.com/youtube/v3/videos?", | |
"id=", video_id, | |
"&key=",key, | |
"&part=snippet,contentDetails,statistics,status") | |
y <- fromJSON(url_video, simplify = FALSE) | |
video_duration_raw <- y$items[[1]]$contentDetails$duration | |
viewCount <- isNull(y$items[[1]]$statistics$viewCount) | |
likeCount <- isNull(y$items[[1]]$statistics$likeCount) | |
dislikeCount <- isNull(y$items[[1]]$statistics$dislikeCount) | |
favoriteCount <- isNull(y$items[[1]]$statistics$favoriteCount) | |
commentCount <- isNull(y$items[[1]]$statistics$commentCount) | |
# video_duration <- duration(video_duration_raw) | |
input <- data.frame(title = video_title, | |
time = video_time, | |
duration = video_duration_raw, | |
viewCount = viewCount, | |
likeCount = likeCount, | |
dislikeCount = dislikeCount, | |
favoriteCount = favoriteCount, | |
commentCount = commentCount, | |
stringsAsFactors = FALSE) | |
dados %<>% bind_rows(input) | |
print(paste0(round(i/videos_n,2)*100,"%")) | |
} | |
dados %<>% as_tibble() |
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