New function save_to_gh()

R/save_to_gh.R

@@ -1,47 +1,81 @@
 #' Save to GitHub
 #'
-#' @param df A dataframe object
-#' @param metadata a list with all the information of a file, usually from
-#'   [get_pip_releases]
-#' @inheritParams load_from_gh
-#' @return invisible NULL
-#' @export
+#' This function uploads or updates a file in a GitHub repository. If the file
+#' does not already exist, a new file will be created. If the
+#' file already exists, it will be updated with the new data.
+#'
+#' @param df A dataframe containing the data to be uploaded or used to
+#'   update an existing file. The dataframe will be converted into a base64-encoded
+#'   string before being uploaded
+#' @param repo A character string specifying the name of the GitHub repo
+#'   where the file will be uploaded or updated
+#' @param owner A character string specifying the GitHub username or organization
+#'   that owns the repository. Defaults to `pipfun.ghowner` option
+#' @param branch A character string specifying the branch of the repository where
+#'   the file should be uploaded or updated. The default is `DEV` branch
+#' @param filename A character string specifying the name of the file to be created
+#'   or updated in the GitHub repository. If not provided, it defaults to repo name
+#' @param ext A character string representing the file extension (e.g., `.csv`). Default is `csv`
+#' @param metadata A list containing metadata for an existing file in the repository. Usually from [get_pip_releases]
+#'   It should contain `sha` (the SHA hash of the file) and `path` (the file
+#'   path in the repository). If `NULL`, the function will check whether the file exists
+#'   and retrieve the metadata
+#' @param verbose A logical: whether to print detailed messages
+#'   about the process. The default is `TRUE`
+#' @param message A character string specifying the commit message for the GitHub upload
+#'   or update. The default is a message with the current timestamp
+#'
+#' @return
+#' Returns `invisible(NULL)`. The function primarily performs an upload or update
+#' operation and does not return any value other than invisibly indicating the completion
+#' of the task.
 #'
 #' @examples
 #' \dontrun{
-#' df <- data.frame(a = 1:10, b = letters[1:10])
-#' save_to_gh(df, repo = "pip_info",
-#'            filename = "to_delete.csv",
-#'            branch = "testing")
+#'   # Create a new file on GitHub
+#'   df <- data.frame(a = 1:5, b = letters[1:5])
+#'   save_to_gh(df = df, repo = "aux_test", filename = "data_example", ext = "csv")
+#'
+#'   # Update an existing file on GitHub
+#'   df <- data.frame(a = 6:10, b = letters[6:10])
+#'   save_to_gh(df = df, repo = "aux_test", filename = "data_example", ext = "csv")
 #' }
+#' @export
+#'
 save_to_gh <- function(df,
-                       repo,
-                       owner     = getOption("pipfun.ghowner"),
-                       branch    = "DEV",
-                       filename  = repo,
-                       ext       = NULL,
-                       metadata  = NULL,
-                       message   = paste("Updating data via R script on",
-                                         Sys.time()),
-                       verbose   = TRUE,
-                       ...) {
-
-  if (!requireNamespace("gh", quietly = TRUE)) {
-    stop("Package 'gh' is required. Please install it using install.packages('gh').")
-  }
-  if (!requireNamespace("cli", quietly = TRUE)) {
-    install.packages("cli")
-    library(cli)
-  }
+                      repo,
+                      owner    = getOption("pipfun.ghowner"),
+                      branch   = "DEV",
+                      filename = repo,
+                      ext      = "csv",
+                      metadata = NULL,
+                      verbose  = TRUE,
+                      message  = paste("Updating data via R script on", Sys.time())) {
+
+  # Get GitHub credentials
+  creds <- get_github_creds()
+
+  # Convert the data frame to base64-encoded content based on the file extension
+  content <- convert_df_to_base64(df, ext)
 
-  creds <- get_github_creds()  # Use the passed function to get GitHub credentials
+  # Prepare params for GitHub request
+  params <- list(
+    branch  = branch,
+    message = message,
+    content = content
+  )
 
+  # Check if metadata is provided and is valid
+  if (!is.null(metadata) && (!"sha" %in% names(metadata) || !"path" %in% names(metadata))) {
+    cli::cli_abort("Invalid metadata provided. It must contain 'sha' and 'path'.")
+  }
 
-  # Try to get existing SHA of the file (if it exists)
+  # Version control: check if the file already exists in the repo
   if (is.null(metadata)) {
     # Construct the file path
     file_path <- check_filename_ext(filename, ext)
 
+    # Attempt to retrieve metadata (file info) from GitHub
     metadata <- tryCatch({
       gh::gh(
         "GET /repos/{owner}/{repo}/contents/{file_path}",
@@ -58,24 +92,16 @@ save_to_gh <- function(df,
         cli::cli_abort(e)
       }
     })
-  } else {
-    file_path <- metadata$path
-
   }
 
-  # Convert data frame to base64-encoded content based on the file extension
-  content <- convert_df_to_base64(df, ext)
-
-  # Prepare parameters for the GitHub API request
-  params <- list(
-    branch  = branch,
-    message = message,
-    content = content
-  )
-
-  # Include 'sha' parameter if the file already exists (for updating)
   if (!is.null(metadata)) {
-    params$sha <- metadata$sha
+    # If metadata exists, get the file path and SHA
+    file_path <- metadata$path
+    params$sha <- metadata$sha  # Include SHA for updating an existing file
+  } else {
+    # If no metadata, this is a new file, so set the file path for creation
+    file_path <- check_filename_ext(filename, ext)
+    params$sha <- NULL
   }
 
   # Upload the file to GitHub
@@ -84,35 +110,45 @@ save_to_gh <- function(df,
     owner   = owner,
     repo    = repo,
     path    = file_path,
-    .params = params,
+    message = message,  # Commit message
+    content = content,
+    .params = params,  # Base64-encoded file content
+    sha     = params$sha,  # Include SHA directly in the body of the request if updating
     .token  = creds$password
   )
 
-  if (verbose) {
-    cli::cli_alert_success("File {.file {filename}.{ext}} saved successfully to
-    branch {.field {branch}}  of {owner}/{repo} in GitHub!")
-  }
-
+  # Update metadata: store initial metadata and URL info
   mt <- output |>
-    append(list(init = metadata)) |>
+    append(list(init = metadata)) |>   # 'init' will be NULL if file didn't exist before PUT request
     append(info_from_url(output$content$url))
 
-  mt$data_change <- mt$content$sha != mt$init$sha
+  # Track if data has changed
+  if (!is.null(mt$init$sha)) {
+    # If SHA exists in 'init', compare the current and previous SHAs
+    mt$data_change <- mt$content$sha != mt$init$sha
+  } else {
+    # If the file was newly created (no initial SHA), set data_change to TRUE
+    mt$data_change <- TRUE
+  }
 
+  # If verbose, print success and data change status
   if (verbose) {
-    if (mt$data_change) {
-      cli::cli_alert("Data has been updated")
-    } else {
-      cli::cli_alert("Data did not change")
-    }
+    cli::cli_alert_success(
+      "File {.file {filename}.{ext}} saved successfully to branch {.field {branch}} of {owner}/{repo} in GitHub!"
+    )
+  }
+
+  if (verbose) {
+    cli::cli_alert(
+      if (mt$data_change) "Data has been updated" else "Data did not change"
+    )
   }
 
   return(invisible(mt))
 }
 
 
 
-
 # Helper function to convert data frame to base64-encoded content based on file extension
 convert_df_to_base64 <- function(df, ext = "csv") {
   if (is.null(ext))