From 1b3df06bf678008904d6fa89de0689026967ae05 Mon Sep 17 00:00:00 2001
From: Jan Danielzick <bodgemaster@noreply.localhost>
Date: Sun, 16 Jun 2024 03:24:53 +0200
Subject: [PATCH] =?UTF-8?q?I=20wrote=20a=20lil=20tool=20to=20convert=20CSV?=
 =?UTF-8?q?=20to=20JSON.=20Seems=20to=20work=20but=20no=20guarantees,=20it?=
 =?UTF-8?q?=E2=80=99s=2003:24=20AM.?=
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---
 csv_to_json.py | 99 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)
 create mode 100644 csv_to_json.py

diff --git a/csv_to_json.py b/csv_to_json.py
new file mode 100644
index 0000000..016112b
--- /dev/null
+++ b/csv_to_json.py
@@ -0,0 +1,99 @@
+import json, sys, os, csv
+
+infile    = ""
+outfile   = ""
+separator = ","
+quote     = '"'
+
+nofirstrow = False
+
+EXIT_SUCCESS=0
+EXIT_USAGE=1
+EXIT_RUNTIME=2
+
+if len(sys.argv)<2 or len(sys.argv)>3:
+  sys.stderr.write(
+"Usage: "+sys.argv[0]+""" INFILE [OUTFILE]
+
+  INFILE: input file, CSV
+  OUTFILE (optional): output file, JSON
+
+Environment Variables:
+
+  SEPARATOR: field delimiter, default comma
+  QUOTE: used to quote strings containing SEPARATOR, default '"'
+  NOFIRSTROW: true or false, disables using the first row as table headers,
+              default false
+"""
+  )
+  sys.stderr.flush()
+  sys.exit(EXIT_USAGE)
+
+if os.path.isfile(sys.argv[1]):
+  infile = sys.argv[1]
+else:
+  print("Not a file: "+sys.argv[1], file=sys.stderr)
+  sys.exit(EXIT_RUNTIME)
+
+# manually specified name
+if len(sys.argv)>2:
+  # check if parent directory of specified file exists
+  if os.path.isdir(os.path.abspath(os.path.join(sys.argv[2], os.pardir))):
+    outfile = sys.argv[2]
+  else:
+    print("Missing parent dir for: "+sys.argv[2], file=sys.stderr)
+    sys.exit(EXIT_RUNTIME)
+
+# attempt to automatically determine name
+else:
+  if len(sys.argv[1])>4 and sys.argv[1][-4:]==".csv":
+    outfile = sys.argv[1][:-4]+".json"
+  else:
+    print("Cannot automatically determine destination file name for: "+sys.argv[1], file=sys.stderr)
+    sys.exit(EXIT_RUNTIME)
+  if os.path.exists(outfile):
+    print("Destination file exists, refusing to operate: "+outfile, file=sys.stderr)
+    print("To overwrite, explicitly specify destination filename on the command line.")
+    sys.exit(EXIT_RUNTIME)
+
+separator = os.environ.get("SEPARATOR", ",")
+if len(separator)>1:
+  print("Warning: Separator from environment appears to be longer than one character. This might cause issues.")
+
+quote = os.environ.get("QUOTE", '"')
+if len(quote)>1:
+  print("Warning: Quote from environment appears to be longer than one character. This might cause issues.")
+
+if os.environ.get("NOFIRSTROW", "false").lower() == "false":
+  nofirstrow = False
+elif os.environ["NOFIRSTROW"].lower() == "true":
+  nofirstrow = True
+else:
+  print("Environment variable NOFIRSTROW is set but neither true nor false.", file=sys.stderr)
+  sys.exit(EXIT_USAGE)
+
+infileobject = open(infile, "r")
+csvreader = csv.reader(infileobject, delimiter=separator, quotechar=quote)
+
+columns = []
+rows = []
+for row in csvreader:
+  if columns == []:
+    # assume we are reading the first row
+    if nofirstrow:
+      columns = list(range(len(row)))
+    else:
+      columns = row
+      continue
+
+  rows = rows + [{}]
+
+  i = 0
+  while i<len(columns):
+    rows[-1][columns[i]] = row[i]
+    i = i+1
+
+infileobject.close()
+
+outfileobject = open(outfile, "w");
+outfileobject.write(json.dumps(rows))