## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(collapse = TRUE, comment = "#>")

## ----setup--------------------------------------------------------------------
library(scopusflow)

## -----------------------------------------------------------------------------
baseline <- example_records
nrow(baseline)

## -----------------------------------------------------------------------------
later_raw <- list(entry = list(
  # carried over from the baseline
  list(`dc:identifier` = "SCOPUS_ID:85000000001", `prism:doi` = "10.1038/s41586-019-0001-1",
       `dc:title` = "Genome editing with CRISPR-Cas9: principles and applications",
       `prism:coverDate` = "2019-04-12"),
  list(`dc:identifier` = "SCOPUS_ID:85000000002", `prism:doi` = "10.1038/s41586-020-0002-2",
       `dc:title` = "Deep learning for medical image analysis: a review",
       `prism:coverDate` = "2020-02-20"),
  list(`dc:identifier` = "SCOPUS_ID:85000000006", `prism:doi` = "10.1103/PhysRevLett.116.061102",
       `dc:title` = "Observation of gravitational waves from a binary black hole merger",
       `prism:coverDate` = "2016-02-11"),
  # newly indexed since the baseline
  list(`dc:identifier` = "SCOPUS_ID:85000000007", `prism:doi` = "10.1126/science.abc1234",
       `dc:title` = "A room-temperature superconductor candidate",
       `prism:coverDate` = "2023-03-08"),
  list(`dc:identifier` = "SCOPUS_ID:85000000008", `prism:doi` = "10.1038/s41586-023-0008-8",
       `dc:title` = "Large language models for scientific discovery",
       `prism:coverDate` = "2023-06-01")
))
later <- scopus_records(later_raw, query = "illustrative later retrieval")
nrow(later)

## -----------------------------------------------------------------------------
changes <- scopus_diff_dois(old = baseline, new = later)
changes

## -----------------------------------------------------------------------------
changes[changes$status == "added", ]

## -----------------------------------------------------------------------------
combined <- scopus_combine(baseline, later, dedupe = TRUE)
nrow(combined)

## -----------------------------------------------------------------------------
path <- file.path(tempdir(), "baseline.rds")
write_scopus_records(baseline, path)
identical(read_scopus_records(path), baseline)

## ----eval = FALSE-------------------------------------------------------------
# later <- scopus_fetch("TITLE-ABS-KEY(CRISPR)", field = "TITLE-ABS-KEY")
# scopus_diff_dois(old = read_scopus_records(path), new = later)