gnu: Add r-visnetwork.

* gnu/packages/cran.scm (r-visnetwork): New variable.

gnu/packages/cran.scm

@@ -30777,6 +30777,98 @@ (define-public r-visdat
 using @code{ggplot2}.")
     (license license:expat)))
 
+(define-public r-visnetwork
+  (package
+    (name "r-visnetwork")
+    (version "2.1.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (cran-uri "visNetwork" version))
+        (sha256
+          (base32
+            "116w3l65lgv18xzav5zz1pbgwpwck66n9cjpja9axrl9zi19vja7"))
+        (snippet
+         '(for-each delete-file
+                    '("inst/htmlwidgets/lib/vis/vis-network.min.js"
+                      "inst/htmlwidgets/lib/export/FileSaver/FileSaver.min.js"
+                      "inst/common-docs-files/js/jquery.url.min.js")))))
+    (properties `((upstream-name . "visNetwork")))
+    (build-system r-build-system)
+    (arguments
+     (list
+      #:modules '((guix build utils)
+                  (guix build r-build-system)
+                  (srfi srfi-1))
+      #:phases
+      '(modify-phases %standard-phases
+         (add-after 'unpack 'process-javascript
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; The inst directory contains some minified JavaScript
+             ;; files.  Regenerate them from sources.
+             (with-directory-excursion "inst/"
+               (call-with-values
+                   (lambda ()
+                     (unzip2
+                      `((,(search-input-file inputs "/FileSaver.js")
+                         "htmlwidgets/lib/export/FileSaver/FileSaver.min.js")
+                        (,(search-input-file inputs "/url.js")
+                         "common-docs-files/js/jquery.url.min.js")
+                        (,(assoc-ref inputs "vis-network.js")
+                         "htmlwidgets/lib/vis/vis-network.min.js"))))
+                 (lambda (sources targets)
+                   (for-each (lambda (source target)
+                               (format #true "Processing ~a --> ~a~%"
+                                       source target)
+                               (invoke "esbuild" source "--minify"
+                                       (string-append "--outfile=" target)))
+                             sources targets)))))))))
+    (propagated-inputs
+     (list r-htmltools
+           r-htmlwidgets
+           r-jsonlite
+           r-magrittr))
+    (native-inputs
+     `(("r-knitr" ,r-knitr)
+       ("esbuild" ,esbuild)
+       ;; The included file has no version information but was created
+       ;; at around the same time as version 9.1.0.
+       ("vis-network.js"
+        ,(origin
+           (method url-fetch)
+           (uri "https://unpkg.com/vis-network@9.1.0/dist/vis-network.js")
+           (sha256
+            (base32
+             "0vh2zf221ildsr5ly9idxi3jpqx61j3phbz5kdd801i0crqk4yj0"))))
+       ;; Version 1.2.0 is a few months more recent than what
+       ;; visNetwork bundles.
+       ("filesaver.js"
+        ,(origin
+           (method git-fetch)
+           (uri (git-reference
+                 (url "https://github.com/eligrey/FileSaver.js/")
+                 (commit "1.2.0")))
+           (file-name (git-file-name "FileSaver.js" "1.2.0"))
+           (sha256
+            (base32
+             "07mw01056fk36pganhs27y8rl5y5hrdsm945pwbbvmdjnzq4ijny"))))
+       ("jquery-url.js"
+        ,(origin
+           (method git-fetch)
+           (uri (git-reference
+                 (url "https://github.com/websanova/js-url/")
+                 (commit "v1.8.6")))
+           (file-name (git-file-name "js-url.js" "1.8.6"))
+           (sha256
+            (base32
+             "0pxqjwqf9avd4d99csgny8xf5c65kyqjnm24pwm4ca1zghsl9wyr"))))))
+    (home-page "https://datastorm-open.github.io/visNetwork/")
+    (synopsis "Network Visualization using vis.js Library")
+    (description
+      "This package provides an R interface to the vis.js JavaScript charting
+library.  It allows an interactive visualization of networks.")
+    (license license:expat)))
+
 (define-public r-muhaz
   (package
     (name "r-muhaz")