---
title: "Getting Started"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{Getting Started}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>",
  cache = FALSE,
  out.width = "100%",
  cache = FALSE,
  screenshot.opts = list(vwidth = 2000, vheight = 600, zoom = 3, selector = "div.html-widget")
)

# save the built-in output hook
hook_output <- knitr::knit_hooks$get("output")
hook_message <- knitr::knit_hooks$get("message")

# define a truncation helper
truncate_lines_tail <- function(x, lines) {
  x <- unlist(strsplit(x, "\n"))
  more <- "..."
  if (length(lines) == 1) {
    if (length(x) > lines) {
      # truncate the output, but add `more`
      # x <- c(head(x, n = lines), more)
      x <- c(more, tail(x, n = lines))
    }
  } else {
    x <- c(more, x[lines], more)
  }
  paste(c(x, ""), collapse = "\n")
}

# set the new hooks
knitr::knit_hooks$set(
  output = function(x, options) {
    lines <- options$out.lines
    if (is.null(lines)) return(hook_output(x, options))
    x <- truncate_lines_tail(x, lines)
    return(hook_output(x, options))
  },
  message = function(x, options) {
    lines <- options$out.lines
    if (is.null(lines)) return(hook_message(x, options))
    x <- truncate_lines_tail(x, lines)
    return(hook_message(x, options))
  }
)

# helper function to get the number of rows of an RO-Crate
rocrate_lines <- function(rocrate) {
  rocrate_txt(rocrate) |>
    length()
}

# helper function to read RO-Crate as text file
rocrate_txt <- function(rocrate) {
  # create tmp file to write a JSON file with the output
  tmp_file <- tempfile(fileext = ".json")
  on.exit(unlink(tmp_file, force = TRUE))
  # write RO-Crate in tmp file
  rocrateR::write_rocrate(rocrate, tmp_file)
  # read RO-Crate as text file
  readLines(tmp_file)
}
```

```{r setup}
library(dsROCrate)
```

This tutorial assumes that you have an internet connection and can access 
OBiBa's Opal demo server: https://opal-demo.obiba.org

Alternatively, if you want to test a local deployment, please check out the 
following vignette first:

```{r, eval = FALSE}
vignette("deploy-local-datashield-server-with-opal", package = "dsROCrate")
```

---------------------

## 1. Creating your first RO-Crate

### 1.1. Connect to an Opal server

Here we will use OBiBa's Opal demo server: https://opal-demo.obiba.org/ which
can be accessed with the following login credentials:

```{r}
# define global variables
## Opal server access
USERNAME <- "administrator"
USERPASS <- "password"
SERVER <- "https://opal-demo.obiba.org"
## Credentials for `dsuser`
### NOTE: this is only used to simulate an analysis and generate logs
DSUSERPASS <- "P@ssw0rd"
```

Next, define global variables used in generating the RO-Crate, such as project 
name, asset (e.g., tables, resources, etc.) references (within the project) and 
user identifiers.

```{r}
## Five safes variables
PEOPLE <- "dsuser"
PROJECT <- "CNSIM"
TABLES <- c("CNSIM1")
```

#### Open connection

Once the credentials and Five Safes variables are configured, we can start a 
new session on the Opal server with the following command:

```{r}
# login to local server with `USERNAME` and `USERPASS`.
o <- opalr::opal.login(
  username = USERNAME,
  password = USERPASS,
  url = SERVER
)

print(o)
```

### 1.2. Create a basic RO-Crate

To create a basic RO-Crate, we will use the 
[`{rocrateR}`](https://github.com/ResearchObject/ro-crate-r) package. This 
package can be installed with the following command:

```{r, eval = FALSE, echo = TRUE}
# install.packages("pak")
pak::pak("rocrateR")

# for development version use
pak::pak("ResearchObject/ro-crate-r@dev")
```

Then, a basic RO-Crate can be created with the following command:

```{r}
basic_rocrate <- rocrateR::rocrate_5s()
```

Note that this RO-Crate uses the [5s-crate](https://trefx.uk/5s-crate/0.4/)
profile.

```{r}
print(basic_rocrate)
```

### 1.3. Add the _Five Safes_ Elements
#### Safe Data
To add details for Safe Data, use the function `dsROCrate::safe_data()`.

```{r, out.lines=-(rocrate_lines(basic_rocrate) - 2)}
basic_rocrate <- o |>
  dsROCrate::safe_data(rocrate = basic_rocrate,
                       project = PROJECT,
                       tables = TABLES)

print(basic_rocrate) # note that the output will be truncated
```

#### Safe Project
To add details for Safe Project, use the function `dsROCrate::safe_project()`.

```{r, out.lines=-(rocrate_lines(basic_rocrate) - 2)}
basic_rocrate <- o |>
  dsROCrate::safe_project(rocrate = basic_rocrate,
                          project = PROJECT)

print(basic_rocrate) # note that the output will be truncated
```

#### Safe People
To add details for Safe People, use the function `dsROCrate::safe_people()`.

```{r safe_people, out.lines=-(rocrate_lines(basic_rocrate) + 1)}
basic_rocrate <- o |>
  dsROCrate::safe_people(rocrate = basic_rocrate, user = PEOPLE)

print(basic_rocrate) # note that the output will be truncated
```

#### Safe Setting
To add details for Safe Setting, use the function `dsROCrate::safe_setting()`.

**⚠️NOTE:** The `dsROCrate::safe_setting` function requires administrator
privileges, so here, we will have to log in with administrator credentials (if
you used a non-administrator account previously).

```{r, eval = FALSE}
# close previous connection
opalr::opal.logout(o)

# open new connection as administrator
o <- opalr::opal.login(
  username = "administrator",
  password = "password",
  url = SERVER
)
```

Then, we can proceed as per usual:
```{r, out.lines=-(rocrate_lines(basic_rocrate) - 2)}
basic_rocrate <- o |>
  dsROCrate::safe_setting(rocrate = basic_rocrate)

print(basic_rocrate) # note that the output will be truncated
```

#### Safe Outputs
To add details for Safe Outputs, use the function `dsROCrate::safe_output()`.
Currently, only log files from the operations executed by the user within a 
specific period. Set the period using `logs_from` and `logs_to`. Additionally,
a list of functions executed by the user are extracted in a separate file/entity.

**⚠️NOTE:** Similar to `dsROCrate::safe_setting`, the `dsROCrate::safe_output` 
function requires of administrator rights, so here, we will have to log in with 
administrator credentials:

```{r, eval = FALSE}
# close previous connection
opalr::opal.logout(o)

# open new connection as administrator
o <- opalr::opal.login(
  username = "administrator",
  password = "password",
  url = SERVER
)
```

---------

##### DataSHIELD operations

**⚠️NOTE:** Before extracting logs, ensure there is recent activity on the 
server for testing purposes. This can be done using the following commands:

###### Setup
You will need the following packages:

```{r, eval = FALSE}
pak::pak("DSI")
pak::pak("DSOpal")
pak::pak("dsBaseClient")
```

###### Open connection
```{r, eval = TRUE}
# run some test commands with dsBaseClient
## needed to defined the OpalDriver class in the current environment
DSOpal::Opal()
## create new login object, note that here we use the `dsuser`
builder <- DSI::newDSLoginBuilder()
builder$append(server = "study1",
               url = SERVER,
               user = "dsuser",
               password = DSUSERPASS,
               driver = "OpalDriver")
logindata <- builder$build()
conns <- DSI::datashield.login(logins = logindata)
```

###### Simulate some operations
```{r, eval = TRUE}
## assign data
DSI::datashield.assign.table(conns["study1"], 
                             symbol = "dsROCrate_test",
                             table = paste0(PROJECT, ".", TABLES[1]),
                             errors.print = TRUE)

dsBaseClient::ds.ls(datasources = conns["study1"])
dsBaseClient::ds.summary("dsROCrate_test")
```

```{r, echo = FALSE, warning = FALSE, message = FALSE}
# check if there are any logs available, if not simulate some operations
```

---------

Then, we can proceed as per usual:

```{r safe_outputs_internal, echo=FALSE}
lines_before_safe_outputs <- rocrate_lines(basic_rocrate)
```

```{r safe_outputs}
basic_rocrate <- o |>
  dsROCrate::safe_output(rocrate = basic_rocrate,
                         logs_from = Sys.time() - 60, # capture the last minute
                         logs_to = Sys.time())
```

```{r, out.lines=-(lines_before_safe_outputs + 1)}
print(basic_rocrate) # note that the output will be truncated
```

### 1.4. Close connection

```{r}
opalr::opal.logout(o)
```

### 1.5. Bag/Save RO-Crate

The resulting RO-Crate can be stored into an RO-Crate bag/archive with the
function `rocrateR::bag_rocrate`:

```{r}
# create temp directory
tmp_path_bag <- file.path(tempdir(), "dsROCrate-getting-started")
dir.create(tmp_path_bag, showWarnings = FALSE)

# create RO-Crate bag
path_to_rocrate_bag <- basic_rocrate |>
  rocrateR::bag_rocrate(path = tmp_path_bag, overwrite = TRUE)
```

We can explore the contents with the following commands:

```{r}
# extract files in temporary directory
path_to_rocrate_bag |>
  # extract contents inside /tmp_path_bag/ROC
  rocrateR::unbag_rocrate(output = file.path(tmp_path_bag, "ROC"), quiet = TRUE) |>
  # create tree with the files
  fs::dir_tree()
```

### 1.6. Clean working directory

```{r}
unlink(tmp_path_bag, recursive = TRUE, force = TRUE)
```


<br />

## 2. Auditing RO-Crates and servers

### 2.1. Audit People

##### List accessible tables within a project for an user
```{r, warning=FALSE}
safe_people_crate_v1 <- opalr::opal.login(
  username = USERNAME,
  password = USERPASS,
  url = SERVER
) |>
  dsROCrate::audit(user = "dsuser", project = "CNSIM")

print(safe_people_crate_v1)
```

###### Markdown report

A markdown report can be created with an overview and details for an RO-Crate,
using the `dsROCrate::report`:

**Only generate .Rmd file**

```{r safe_people_crate_audit_v1}
safe_people_crate_v1_rmd <- tempfile(fileext = ".Rmd") # temporary file

safe_people_crate_contents <- safe_people_crate_v1 |>
  dsROCrate::report(filepath = safe_people_crate_v1_rmd, render = FALSE)

# display Overview diagram
safe_people_crate_contents$overview_diagram

# display Overview data (Safe People, Safe Projects and Safe Data)
safe_people_crate_contents$overview_data |>
  knitr::kable()
```

**Render and display report (HTML)**

```{r, eval = FALSE}
safe_people_crate_v1 |>
  dsROCrate::report(filepath = safe_people_crate_v1_rmd,
                            title = "DataSHIELD Safe People - Audit Report",
                            render = TRUE, 
                            overwrite = TRUE)
```

### 2.2. Audit Project

##### List users and dataset/table level permissions within a project
```{r, warning=FALSE}
safe_project_crate_v1 <- opalr::opal.login(
  username = USERNAME,
  password = USERPASS,
  url = SERVER
) |>
  dsROCrate::audit(project = "CNSIM")

print(safe_project_crate_v1)
```

###### Markdown report

A markdown report can be created with an overview and details for an RO-Crate,
using the `dsROCrate::report`:

**Only generate .Rmd file**

```{r safe_project_crate_audit_v1}
safe_project_crate_v1_rmd <- tempfile(fileext = ".Rmd") # temporary file

safe_project_crate_contents <- safe_project_crate_v1 |>
  dsROCrate::report(filepath = safe_project_crate_v1_rmd, render = FALSE)

# display Overview diagram
safe_project_crate_contents$overview_diagram

# display Overview data (Safe People, Safe Projects and Safe Data)
safe_project_crate_contents$overview_data |>
  knitr::kable()
```

**Render and display report (HTML)**

```{r, eval = FALSE}
safe_project_crate_v1 |>
  dsROCrate::report(filepath = safe_project_crate_v1_rmd, 
                            title = "DataSHIELD Safe Project - Audit Report",
                            render = TRUE, 
                            overwrite = TRUE)
```

<br />

### 2.3. Audit Study

##### List users and dataset/table level permissions within a study (i.e., multiple servers)
```{r, warning=FALSE}
study_crate_v1 <- 
  list(
    "opal_test" = opalr::opal.login(
      username = USERNAME,
      password = USERPASS,
      url = "https://opal-test.obiba.org"
    ),
    "opal_demo" = opalr::opal.login(
      username = USERNAME,
      password = USERPASS,
      url = "https://opal-demo.obiba.org"
    )
  ) |>
  dsROCrate::audit(project = "CNSIM")

print(study_crate_v1)
```

###### Markdown report

A markdown report can be created with an overview and details for an RO-Crate,
using the `dsROCrate::report`:

**Only generate .Rmd file**

```{r study_crate_audit_v1}
study_crate_v1_rmd <- tempfile(fileext = ".Rmd") # temporary file

safe_project_crate_contents <- study_crate_v1 |>
  dsROCrate::report(filepath = study_crate_v1_rmd, render = FALSE)

# display Overview diagram
safe_project_crate_contents$overview_diagram

# display Overview data (Safe People, Safe Projects and Safe Data)
safe_project_crate_contents$overview_data |>
  knitr::kable()
```

**Render and display report (HTML)**

```{r, eval = FALSE}
study_crate_v1 |>
  dsROCrate::report(filepath = study_crate_v1_rmd, 
                            title = "DataSHIELD Study audit",
                            render = TRUE, 
                            overwrite = TRUE)
```

<br />

```{r, echo = FALSE, message = FALSE, error = FALSE}
unlink(safe_people_crate_v1_rmd, TRUE, TRUE)
unlink(safe_project_crate_v1_rmd, TRUE, TRUE)
unlink(study_crate_v1_rmd, TRUE, TRUE)
```
