Package 'REDCapExporter'

as.*

Description

Coerce REDCapExporter objects to data.frame.

Usage

## S3 method for class 'rcer_raw_metadata'
as.data.frame(x, ...)

## S3 method for class 'rcer_raw_record'
as.data.frame(x, ...)

## S3 method for class 'rcer_raw_project'
as.data.frame(x, ...)

## S3 method for class 'rcer_raw_user'
as.data.frame(x, ...)

Arguments

x	any R object.
...	additional arguments to be passed to or from methods.

Details

These functions are S3 methods for as.data.frame for the raw exports from the REDCap API.

Examples

data("avs_raw_record")

avs_record <- as.data.frame(avs_raw_record)

str(avs_record)

---

Build R Data Package

Description

Build a R Data Package from the core contents of a REDCap Project.

Usage

build_r_data_package(x, ...)

## S3 method for class 'rcer_rccore'
build_r_data_package(x, path = NULL, author_roles = NULL, verbose = TRUE, ...)

## Default S3 method:
build_r_data_package(
  x,
  uri = NULL,
  token = NULL,
  format = NULL,
  path = NULL,
  author_roles = NULL,
  verbose = TRUE,
  ...
)

Arguments

x	a rcer_rccore object
...	arguments passed to format_record
path	Path where the exported project source will be created/overwritten.
author_roles	a list naming specific roles for each user id found in the user table from an exported project. By default all users with be contributors ('ctb'). You will need to define a author/creator.
verbose	provide messages to tell the user what is happening
uri	The URI for the REDCap API. If NULL (default) the value Sys.getenv("REDCap_API_URI") is used.
token	The API token for the project you want to export from. If NULL (default) the value Sys.getenv("REDCap_API_TOKEN") is used.
format	The format to return. If NULL (default) the value Sys.getenv("REDCap_API_format") is used.

Details

To export the data from a REDCap project you will need to have an API Token. Remember, the token is the equivalent of a username and password. As such you should not list the token in plan text. Several alternative methods for passing the token to this method will be provided in examples and vignettes. We strongly encourage the use of the package secret https://cran.r-project.org/package=secret to build vaults to store tokens locally.

The initial export will consist of four pieces of data, the user data, metadata, project info, and records.

Examples

## Please read the vignette for examples:
## vignette(topic = "export", package = "REDCapExporter")

library(REDCapExporter)
# avs_raw_core <- export_core()
data(avs_raw_core)
tmppth <- tempdir()
build_r_data_package(avs_raw_core, tmppth, author_roles = list(dewittp = c("cre", "aut")))
fs::dir_tree(tmppth)

---

Column Types

Description

Define a type for each column of the records for a REDCap project based on the metadata for the project.

Usage

col_type(
  x,
  factors = TRUE,
  lubridate_args = list(quiet = TRUE, tz = NULL, locale = Sys.getlocale("LC_TIME"),
    truncated = 0),
  ...
)

Arguments

x	a rcer_metadata or rcer_raw_metadata object
factors	If TRUE (default) then variables reported via drop-down lists and radio buttons are set up to be factors. If FALSE, then the column type will be character.
lubridate_args	a list of arguments passed to the date and time parsing calls. See Details.
...	not currently used

Details

REDCap text fields for dates and times are formatted via lubridate

REDCap	lubridate parsing function
---------------------	--------------------------
date_mdy	mdy
date_dmy	dmy
date_ymd	ymd
datetime_dmy	dmy_hm
datetime_mdy	mdy_hm
datetime_ymd	ymd_hm
datetime_seconds_dmy	dmy_hms
datetime_seconds_mdy	mdy_hms
datetime_seconds_ymd	ymd_hms
time	hm
time_mm_ss	ms

Other text files are coerced as

REDCap	R coercion
---------------------	--------------------------
number	as.numeric
number_1dp	as.numeric
number_2dp	as.numeric
integer	as.integer
..default..	as.character

Variables inputted into REDCap via radio button or dropdown lists (multiple choice - pick one) are coerced to factors by default but can be returned as characters if the argument factors = FALSE is set.

Calculated and slider (visual analog scale) variables are coerced via as.numeric.

Yes/No and True/False variables are include as integer values 0 = No or False, and 1 for Yes or True.

Checkboxes are the most difficult to work with between the metadata and records. A checkbox field_name in the metadata could be, for example, "eg_checkbox" and the columns in the records will be "eg_checkbox___<code>" were "code" could be numbers, or character strings. REDCapExporter attempts to coerce the "eg_checkbox___<code>" columns to integer values, 0 = unchecked and 1 = checked.

Value

a rcer_col_type object

Examples

data("avs_raw_metadata")
col_type(avs_raw_metadata)

---

Raw Exports From an Example REDCap Project

Description

These data sets are the results of calling export_content. An API token is required to reproduce these calls. No such token will be provided publicly, so these data sets are provided so end users can run examples for other tools provided in the REDCapExporter package.

Usage

avs_raw_project

avs_raw_metadata

avs_raw_user

avs_raw_record

avs_raw_core

avs_raw_project_json

avs_raw_metadata_json

avs_raw_user_json

avs_raw_record_json

avs_raw_core_json

Format

An object of class rcer_raw_project (inherits from character) of length 1.

An object of class rcer_raw_metadata (inherits from character) of length 1.

An object of class rcer_raw_user (inherits from character) of length 1.

An object of class rcer_raw_record (inherits from character) of length 1.

An object of class rcer_rccore of length 4.

An object of class rcer_raw_project (inherits from character) of length 1.

An object of class rcer_raw_metadata (inherits from character) of length 1.

An object of class rcer_raw_user (inherits from character) of length 1.

An object of class rcer_raw_record (inherits from character) of length 1.

An object of class rcer_rccore of length 4.

Details

avs_raw_project provides meta data about the project itself in a csv format. avs_raw_project_json is the same information in json format.

avs_raw_metadata is the data dictionary for the REDCap Project in a csv format. This information can be used with format_record to build a data.frame that is ready for analysis. avs_raw_metadata_json is the same metadata information in json format.

avs_raw_user REDCap Project user table in csv format. avs_raw_user_json is the same information in json format.

avs_raw_record REDCap Project records, i.e., 'the data' in csv format. avs_raw_record_json is the same information in json format.

Examples

## Not run: 
avs_raw_project  <- export_content(content = "project",  format = "csv")
avs_raw_metadata <- export_content(content = "metadata", format = "csv")
avs_raw_user     <- export_content(content = "user",     format = "csv")
avs_raw_record   <- export_content(content = "record",   format = "csv")
avs_raw_core     <- export_core(format = "csv")

## End(Not run)

data(avs_raw_project)
data(avs_raw_user)
data(avs_raw_metadata)
data(avs_raw_record)
data(avs_raw_core)

str(avs_raw_project)
str(avs_raw_user)
str(avs_raw_metadata)
str(avs_raw_record)
str(avs_raw_core)

avs <- format_record(avs_raw_record, avs_raw_metadata)
str(avs)

---

Export Content

Description

Export specific data elements from REDCap

Usage

export_content(content, uri = NULL, token = NULL, format = NULL, ...)

Arguments

content	The element to export, see Details.
uri	The URI for the REDCap API. If NULL (default) the value Sys.getenv("REDCap_API_URI") is used.
token	The API token for the project you want to export from. If NULL (default) the value Sys.getenv("REDCap_API_TOKEN") is used.
format	The format to return. If NULL (default) the value Sys.getenv("REDCap_API_format") is used.
...	additional arguments passed to handle_setform.

Details

The content and format arguments are used to control the specific items to be exported, and in what format. **Review the API documentation**

The uri, token, and format arguments are set to NULL by default and will look to the Sys.getenv("REDCap_API_URI"), Sys.getenv("REDCap_API_TOKEN"), and Sys.getenv("REDCap_API_format"), respectively, to define the values if not explicitly done so by the end user.

Value

The raw return from the REDCap API with the class rcer_raw_<content>.

Examples

# A reproducible example would require a REDCap project, accessable via an
# API token.  An example of the return from these calls are provided as data
# with this package.

# avs_raw_metadata <- export_content(content = "metadata")
data(avs_raw_metadata)
str(avs_raw_metadata)

---

Export Core

Description

Export Core Contents of a REDCap Project.

Usage

export_core(uri = NULL, token = NULL, format = NULL, verbose = TRUE, ...)

Arguments

uri	The URI for the REDCap API. If NULL (default) the value Sys.getenv("REDCap_API_URI") is used.
token	The API token for the project you want to export from. If NULL (default) the value Sys.getenv("REDCap_API_TOKEN") is used.
format	The format to return. If NULL (default) the value Sys.getenv("REDCap_API_format") is used.
verbose	provide messages to tell the user what is happening
...	not currently used

Value

A rcer_rccore object: a list with the project info, metadata, user table, and records, all in a "raw" format direct from the API.

Examples

# A reproducible example would require a REDCap project, accessable via an
# API token.  An example of the return from these calls are provided as data
# with this package.

# avs_raw_core <- export_core()

data(avs_raw_core)
str(avs_raw_core)

---

Format Record

Description

Use REDCap project metadata to build a well formatted data.frame for the record.

Usage

format_record(x, metadata = NULL, col_type = NULL, ...)

Arguments

x	a rcer_rccore, rcer_raw_record, or rcer_record object.
metadata	a rcer_metadata or rcer_raw_metadata object. Will be ignored if col_type is defined.
col_type	a rcer_col_type object.
...	other arguments passed to col_type

Value

A data.frame

See Also

export_core, export_content, vignette("formatting", package = "REDCapExporter")

Examples

data("avs_raw_metadata")
data("avs_raw_record")

# Formatting the record can be called in different ways and the same result
# will be generated
identical(
  format_record(avs_raw_record, avs_raw_metadata),
  format_record(avs_raw_core)
)

avs <- format_record(avs_raw_record, avs_raw_metadata)
avs

---

Read Text

Description

Read raw REDCap API return. Built to parse csv or json.

Usage

read_text(x)

Arguments

x	the raw return from the API call to REDCap

Details

This is a non-exported function and not expected to be called by the end user. Used by the as.data.frame methods.

Value

a data.frame

---

Set up and use of a Keyring for REDCap API Tokens

Description

Tools for checking for, and setting up, a file based keyring for storing REDCap API tokens.

Usage

REDCapExporter_keyring_check(keyring = "REDCapExporter", password = NULL)

REDCapExporter_add_api_token(
  project,
  keyring = "REDCapExporter",
  user = NULL,
  password = NULL,
  overwrite = FALSE
)

REDCapExporter_get_api_token(
  project,
  keyring = "REDCapExporter",
  user = NULL,
  password = NULL
)

Arguments

keyring	a character vector identifying the name of the keyring, defaults to "REDCapExporter"
password	This is the password for the keyring. The default is an empty password.
project	the name of the REDCap project the API token is identified by.
user	user name to associate the token with. Defaults to Sys.info()[["user"]].
overwrite	logical, if TRUE overwrite the existing token.

Value

REDCapExporter_keyring_check returns TRUE, invisibly, as does REDCapExporter_add_api_token. REDCapExporter_get_api_token returns the token invisibly as not to print the value to the console by default. Still, be careful with your token.

See Also

vignette(topic = "api", package = "REDCapExporter")

Examples

## Not run: 
# Check if a keyring exisits. If it does not, create one.
REDCapExporter_keyring_check()

# add token if it does not already exist.  If a token
# already exists, then you will be told so unless overwrite is set to TRUE
REDCapExporter_add_api_token("Project1")

# get a token and set as an envrionmental variable
Sys.setenv(REDCap_API_TOKEN = REDCapExporter_get_api_token("Project1"))

## End(Not run)

---

Write DESCRIPTION File from REDCap Metadata

Description

Create the DESCRIPTION file for the R Data package based on an Exported REDCap Project

Usage

write_description_file(access_time, user, roles, project_info, path)

write_authors(user, roles = NULL)

Arguments

access_time	The Sys.time() when the API calls were made
user	User(s), as noted in the REDCap project meta data. This parameter is singular as it refers to the "user" content one can access from the REDCap API.
roles	roles the user hold with respect to the R data package. These roles have no relationship to REDCap roles.
project_info	project metadata
path	path to the root for the generated R data package.

Details

This is a non-exported function and is not expected to be called by the end user.

write_description_file creates the DESCRIPTION file for the exported R data package and write_authors creates the "Authors@R" field of the DESCRIPTION based on the "user" data extracted from the REDCap project.

---