adding grade-school (#144)

config.json

@@ -345,6 +345,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "grade-school",
+        "name": "Grade School",
+        "uuid": "80df0040-0568-4d71-9562-07d89d7d3841",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "meetup",
         "name": "Meetup",

exercises/practice/grade-school/.docs/instructions.md

@@ -0,0 +1,41 @@
+# Instructions
+
+Given students' names along with the grade that they are in, create a roster
+for the school.
+
+In the end, you should be able to:
+
+- Add a student's name to the roster for a grade
+  - "Add Jim to grade 2."
+  - "OK."
+- Get a list of all students enrolled in a grade
+  - "Which students are in grade 2?"
+  - "We've only got Jim just now."
+- Get a sorted list of all students in all grades.  Grades should sort
+  as 1, 2, 3, etc., and students within a grade should be sorted
+  alphabetically by name.
+  - "Who all is enrolled in school right now?"
+  - "Let me think. We have
+  Anna, Barb, and Charlie in grade 1,
+  Alex, Peter, and Zoe in grade 2
+  and Jim in grade 5.
+  So the answer is: Anna, Barb, Charlie, Alex, Peter, Zoe and Jim"
+
+Note that all our students only have one name  (It's a small town, what
+do you want?) and each student cannot be added more than once to a grade or the
+roster.
+In fact, when a test attempts to add the same student more than once, your
+implementation should indicate that this is incorrect.
+
+## For bonus points
+
+Did you get the tests passing and the code clean? If you want to, these
+are some additional things you could try:
+
+- If you're working in a language with mutable data structures and your
+  implementation allows outside code to mutate the school's internal DB
+  directly, see if you can prevent this. Feel free to introduce additional
+  tests.
+
+Then please share your thoughts in a comment on the submission. Did this
+experiment make the code better? Worse? Did you learn anything from it?

exercises/practice/grade-school/.meta/config.json

@@ -0,0 +1,25 @@
+{
+  "authors": [
+    "kapitaali"
+  ],
+  "files": {
+    "solution": [
+      "src/grade-school.cob"
+    ],
+    "test": [
+      "tst/grade-school/grade-school.cut"
+    ],
+    "example": [
+      ".meta/proof.ci.cob"
+    ],
+    "invalidator": [
+      "test.ps1",
+      "test.sh",
+      "bin/fetch-cobolcheck",
+      "bin/fetch-cobolcheck.ps1",
+      "config.properties"
+    ] 
+  },
+  "blurb": "Given students' names along with the grade that they are in, create a roster for the school.",
+  "source": "A pairing session with Phil Battos at gSchool"
+}

exercises/practice/grade-school/.meta/proof.ci.cob

@@ -0,0 +1,76 @@
+       IDENTIFICATION DIVISION.
+       PROGRAM-ID. GRADE-SCHOOL.
+       AUTHOR. kapitaali.
+       ENVIRONMENT DIVISION.
+       DATA DIVISION.
+       WORKING-STORAGE SECTION.
+       01 WS-STUDENTNAME           PIC X(60).
+       01 WS-STUDENTGRADE          PIC 9.
+       01 WS-DESIREDGRADE          PIC 9.
+       01 ENTRIES                  PIC 99 COMP.
+       01 I                        PIC 99 COMP.
+       01 J                        PIC 99 COMP.
+       01 K                        PIC 99 COMP.
+       01 TEMPNAME                 PIC X(60).
+       01 TEMPGRADE                PIC 9.
+
+       01 STUDENTROSTER.
+           02 ROSTER               OCCURS 10 INDEXED BY INDX.
+              05 ST-NAME           PIC X(60).
+              05 ST-GRADE          PIC 9.   
+
+
+       PROCEDURE DIVISION.
+
+
+       INIT-ROSTER.
+           INITIALIZE STUDENTROSTER.
+           MOVE 0 TO ENTRIES.
+           SET INDX TO 0.
+
+
+       ADD-STUDENT.       
+           SET INDX TO ENTRIES.
+           SEARCH ROSTER VARYING INDX
+               AT END PERFORM ADD-ENTRY
+             WHEN ST-NAME(INDX) = WS-STUDENTNAME 
+                   CONTINUE
+           END-SEARCH.          
+           SORT ROSTER ASCENDING ST-GRADE ST-NAME.
+           PERFORM MOVE-ENTRIES.
+
+
+       MOVE-ENTRIES.
+           COMPUTE J = 10 - ENTRIES.
+           PERFORM VARYING I FROM 1 BY 1 UNTIL I > ENTRIES
+              COMPUTE K = I + J
+              MOVE ST-NAME(K) TO TEMPNAME
+              MOVE ST-GRADE(K) TO TEMPGRADE
+              MOVE SPACES TO ST-NAME(K)
+              MOVE 0 TO ST-GRADE(K)
+              MOVE TEMPNAME TO ST-NAME(I)
+              MOVE TEMPGRADE TO ST-GRADE(I)
+           END-PERFORM.
+
+
+       ADD-ENTRY.
+           ADD 1 TO ENTRIES.
+           MOVE WS-STUDENTGRADE TO ST-GRADE(ENTRIES).
+           MOVE WS-STUDENTNAME TO ST-NAME(ENTRIES).
+
+
+       GET-GRADE.
+           PERFORM VARYING I FROM 1 BY 1 UNTIL I > 10
+              IF WS-DESIREDGRADE IS NOT EQUAL TO ST-GRADE(I)
+                 MOVE SPACES TO ST-NAME(I)
+                 MOVE 0 TO ST-GRADE(I)
+              END-IF
+           END-PERFORM.
+           SORT ROSTER ASCENDING ST-GRADE ST-NAME.
+           MOVE 0 TO ENTRIES
+           PERFORM VARYING I FROM 1 BY 1 UNTIL I > 10
+              IF ST-NAME(I) <> SPACES
+                 ADD 1 TO ENTRIES
+              END-IF
+           END-PERFORM.
+           PERFORM MOVE-ENTRIES.           

exercises/practice/grade-school/bin/fetch-cobolcheck

@@ -0,0 +1,63 @@
+#!/usr/bin/env bash
+
+# This file is a copy of the
+# https://github.com/exercism/configlet/blob/main/scripts/fetch-configlet file.
+# Please submit bugfixes/improvements to the above file to ensure that all tracks benefit from the changes.
+
+# set -eo pipefail
+
+readonly LATEST='https://api.github.com/repos/0xE282B0/cobol-check/releases/latest'
+
+case "$(uname)" in
+  Darwin*)   os='mac'     ;;
+  Linux*)    os='linux'   ;;
+  Windows*)  os='windows' ;;
+  MINGW*)    os='windows' ;;
+  MSYS_NT-*) os='windows' ;;
+  *)         os='linux'   ;;
+esac
+
+case "${os}" in
+  windows*) ext='.exe' ;;
+  *)        ext='' ;;
+esac
+
+arch="$(uname -m)"
+
+curlopts=(
+  --silent
+  --show-error
+  --fail
+  --location
+  --retry 3
+)
+
+if [[ -n "${GITHUB_TOKEN}" ]]; then
+  curlopts+=(--header "authorization: Bearer ${GITHUB_TOKEN}")
+fi
+
+suffix="${os}-${arch}${ext}"
+
+get_download_url() {
+  curl "${curlopts[@]}" --header 'Accept: application/vnd.github.v3+json' "${LATEST}" |
+    grep "\"browser_download_url\": \".*/download/.*/cobol-check.*${suffix}\"$" |
+    cut -d'"' -f4
+}
+
+main() {
+  if [[ -d ./bin ]]; then
+    output_dir="./bin"
+  elif [[ $PWD == */bin ]]; then
+    output_dir="$PWD"
+  else
+    echo "Error: no ./bin directory found. This script should be ran from a repo root." >&2
+    return 1
+  fi
+
+  output_path="${output_dir}/cobolcheck${ext}"
+  download_url="$(get_download_url)"
+  curl "${curlopts[@]}" --output "${output_path}" "${download_url}"
+  chmod +x "${output_path}"
+}
+
+main

exercises/practice/grade-school/bin/fetch-cobolcheck.ps1

@@ -0,0 +1,28 @@
+# This file is a copy of the
+# https://github.com/exercism/configlet/blob/main/scripts/fetch-configlet.ps1 file.
+# Please submit bugfixes/improvements to the above file to ensure that all tracks
+# benefit from the changes.
+
+$ErrorActionPreference = "Stop"
+$ProgressPreference = "SilentlyContinue"
+
+$requestOpts = @{
+    Headers           = If ($env:GITHUB_TOKEN) { @{ Authorization = "Bearer ${env:GITHUB_TOKEN}" } } Else { @{ } }
+    MaximumRetryCount = 3
+    RetryIntervalSec  = 1
+}
+
+$arch = If ([Environment]::Is64BitOperatingSystem) { "amd64" } Else { "x86" }
+$fileName = "cobol-check-windows-$arch.exe"
+
+Function Get-DownloadUrl {
+    $latestUrl = "https://api.github.com/repos/0xE282B0/cobol-check/releases/latest"
+    Invoke-RestMethod -Uri $latestUrl -PreserveAuthorizationOnRedirect @requestOpts
+    | Select-Object -ExpandProperty assets
+    | Where-Object { $_.browser_download_url -match $FileName }
+    | Select-Object -ExpandProperty browser_download_url
+}
+
+$downloadUrl = Get-DownloadUrl
+$outputFile = Join-Path -Path $PSScriptRoot -ChildPath "cobolcheck.exe"
+Invoke-WebRequest -Uri $downloadUrl -OutFile $outputFile @requestOpts