Add script to upload solution

Makefile

@@ -15,3 +15,7 @@ run:
 # test today's puzzle
 test:
 	./scripts/test.sh
+
+# upload today's solution
+upload:
+	./scripts/upload.sh

scripts/upload.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+
+set -e
+
+year="${AOC_YEAR:-$(date +%Y)}"
+month="${AOC_MONTH:-$(date +%m)}"
+day="${AOC_DAY:-$(date +%-d)}"
+
+if [[ ! "$month" -eq 12 ]]; then
+  echo "It's not december quite yet. If you wish to access previous events"
+  echo "specify AOC_YEAR, AOC_MONTH and AOC_DAY"
+  exit 1
+fi
+
+session_cookie="$(security find-generic-password -w -a "com.adventofcode.SessionCookie")"
+
+# One line per solution. If there are more, there are multiple solutions - ignore all but the first two
+solutions="$(./scripts/run.sh | head -n 2 | xargs)"
+
+part=1
+correct=0
+for solution in $solutions; do
+  output="$(curl -X POST -H 'Content-Type: application/x-www-form-urlencoded' -H "Referer: https://adventofcode.com/$year/day/$day" --data "level=$part&answer=$solution" --silent --cookie "session=$session_cookie" "https://adventofcode.com/$year/day/$day/answer")"
+  correct="$(echo "$output" | grep -c "That's the right answer" || true)"
+  incorrect="$(echo "$output" | grep -c "That's not the right answer" || true)"
+  already_solved="$(echo "$output" | grep -c "You don't seem to be solving the right level" || true)"
+  if [[ "$correct" -eq 1 ]] || [[ "$already_solved" -eq 1 ]]; then
+    echo "✅ solution $part"
+    correct=$((correct+1))
+  elif [[ "$incorrect" -eq 1 ]]; then
+    echo "❌ solution $part"
+  else
+    echo "⚠️ solution $part"
+    echo "------------"
+    echo "$output"
+    echo "------------"
+  fi
+  part=$((part+1))
+done
+
+echo ""
+if [[ "$correct" -eq 1 ]]; then
+  echo -e "Well done! Make sure to run \033[1mmake init\033[0m again to get the second part of the puzzle"
+elif [[ "$correct" -gt 1 ]]; then
+  echo -e "Well done! That's all for today"
+fi