Created
February 8, 2015 20:03
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Gathering session data for SQLBits dashboard
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library(magrittr) | |
library(rvest) | |
library(data.table) | |
library(stringr) | |
library(plyr) | |
# All (accepted) submitted sessions | |
allsubmissions <- html("https://sqlbits.com/information/PublicSessions.aspx") %>% | |
html_node(".session") %>% | |
html_table() %>% | |
extract2(1) %>% | |
data.table(raw = .) | |
dataclean <- function(x) { | |
# Changes datatype, trims excess whitespace, and puts any carriage returns as spaces in the abstracts | |
str_replace_all(str_trim(unlist(x)), "\r\n", " ") | |
} | |
allsubmissions[ | |
, `:=`(split = str_split(raw, pattern = "\r\n "))][ | |
, `:=`(SessionLevel = dataclean(pluck(split, 1)) | |
, SessionTrack = dataclean(pluck(split,4)) | |
, SessionTitle = dataclean(pluck(split, 8)) | |
, SessionSpeaker = dataclean(pluck(split, 17)) | |
, SessionAbstract = dataclean(pluck(split, 20)) | |
)] | |
desiredcols <- c("SessionLevel", "SessionTrack", "SessionTitle", "SessionSpeaker", "SessionAbstract") | |
allsubmissions <- allsubmissions[, desiredcols, with = FALSE] | |
# All selected sessions | |
getsessions <- function(url) { | |
html(url) %>% | |
html_nodes(".AgendaSession") %>% | |
html_table(fill = TRUE) %>% | |
rbind.fill %>% | |
data.table | |
} | |
days <- 20150304:20150307 | |
urls <- paste0("https://sqlbits.com/information/event14/Agenda.aspx?", days) | |
selectedsessions <- lapply(urls, getsessions) %>% | |
rbind.fill %>% | |
data.table | |
nonsessiontitles <- "Registration|Keynote|DitBits|Lunch|Break|Prize-Giving|End of Day" | |
# http://txt2re.com/ | |
timeregex <- "((?:(?:[0-1][0-9])|(?:[2][0-3])|(?:[0-9])):(?:[0-5][0-9])(?::[0-5][0-9])?(?:\\s?(?:am|AM|pm|PM))?)" | |
timerow <- paste0(timeregex, "(.)", timeregex) | |
selectedsessions <- selectedsessions[(str_detect(X1, nonsessiontitles) | str_detect(X1, timerow)) == FALSE][ | |
, `:=`(ID = .I | |
, Pair = (.I - 1)%/%2)] | |
setkey(selectedsessions, Pair) | |
selectedsessions.titles <- selectedsessions[ID%%2 == 1] | |
selectedsessions.speakers <- selectedsessions[ID%%2 == 0] | |
selectedsessions <- selectedsessions.titles[selectedsessions.speakers, | |
.(SessionTitle = X1, | |
SessionSpeaker = i.X1, | |
SessionLevel = i.X2)] | |
# Joining the data | |
setkey(allsubmissions, SessionTitle, SessionSpeaker) | |
setkey(selectedsessions, SessionTitle, SessionSpeaker) | |
# removes multiple instances for pre-cons etc | |
selectedsessions <- unique(selectedsessions) | |
finaldataset <- selectedsessions[allsubmissions] | |
sessionswithoutsubmissions <- allsubmissions[selectedsessions][is.na(SessionTrack)] |
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