Used qwen to validate allowed values

CLAUDE.md

@@ -1,154 +1,13 @@
-# Development Guidelines
+# Tools available
+- This is a flutter app.
+- Flutter and Dart are not installed locally. They are executed via a flutter wrapper script, like gradlew (gradle wrapper) for gradle.
+- Flutter and Dart are installed in a podman container. This container is invoked via `./flutterw` bash script.
+  - `./flutterw --build-container` to build the image and the container with flutter tools
+  - `./flutterw --exec <args>` to execute bash commands inside the container
+  - `./flutterw <args>` is a shorthand for `./flutter --exec flutter <args>`, so `./flutterw` and `flutter` are somewhat equivalent.
+- Examples:
+  - `flutter pub get` --> `./flutterw pub get`
+  - `flutter run -d linux` --> `./flutterw run -d linux`
+- See `./Makefile` for more use examples.
 
-## Philosophy
 
-### Core Beliefs
-
-- **Incremental progress over big bangs** - Small changes that compile and pass tests
-- **Learning from existing code** - Study and plan before implementing
-- **Pragmatic over dogmatic** - Adapt to project reality
-- **Clear intent over clever code** - Be boring and obvious
-
-### Simplicity Means
-
-- Single responsibility per function/class
-- Avoid premature abstractions
-- No clever tricks - choose the boring solution
-- If you need to explain it, it's too complex
-
-## Process
-
-### 1. Planning & Staging
-
-Break complex work into 3-5 stages. Document in `IMPLEMENTATION_PLAN.md`:
-
-```markdown
-## Stage N: [Name]
-**Goal**: [Specific deliverable]
-**Success Criteria**: [Testable outcomes]
-**Tests**: [Specific test cases]
-**Status**: [Not Started|In Progress|Complete]
-```
-- Update status as you progress
-- Remove file when all stages are done
-
-### 2. Implementation Flow
-
-1. **Understand** - Study existing patterns in codebase
-2. **Branch** - Create a new branch from current branch, asing a memorable name to the new branch
-3. **Test** - Write test first (red)
-4. **Implement** - Minimal code to pass (green)
-5. **Refactor** - Clean up with tests passing
-6. **Commit** - With clear message linking to plan
-
-### 3. When Stuck (After 3 Attempts)
-
-**CRITICAL**: Maximum 3 attempts per issue, then STOP.
-
-1. **Document what failed**:
-   - What you tried
-   - Specific error messages
-   - Why you think it failed
-
-2. **Research alternatives**:
-   - Find 2-3 similar implementations
-   - Note different approaches used
-
-3. **Question fundamentals**:
-   - Is this the right abstraction level?
-   - Can this be split into smaller problems?
-   - Is there a simpler approach entirely?
-
-4. **Try different angle**:
-   - Different library/framework feature?
-   - Different architectural pattern?
-   - Remove abstraction instead of adding?
-
-## Technical Standards
-
-### Architecture Principles
-
-- **Composition over inheritance** - Use dependency injection
-- **Interfaces over singletons** - Enable testing and flexibility
-- **Explicit over implicit** - Clear data flow and dependencies
-- **Test-driven when possible** - Never disable tests, fix them
-
-### Code Quality
-
-- **Every commit must**:
-  - Compile successfully
-  - Pass all existing tests
-  - Include tests for new functionality
-  - Follow project formatting/linting
-
-- **Before committing**:
-  - Run formatters/linters
-  - Self-review changes
-  - Ensure commit message explains "why"
-
-### Error Handling
-
-- Fail fast with descriptive messages
-- Include context for debugging
-- Handle errors at appropriate level
-- Never silently swallow exceptions
-
-## Decision Framework
-
-When multiple valid approaches exist, choose based on:
-
-1. **Testability** - Can I easily test this?
-2. **Readability** - Will someone understand this in 6 months?
-3. **Consistency** - Does this match project patterns?
-4. **Simplicity** - Is this the simplest solution that works?
-5. **Reversibility** - How hard to change later?
-
-## Project Integration
-
-### Learning the Codebase
-
-- Find 3 similar features/components
-- Identify common patterns and conventions
-- Use same libraries/utilities when possible
-- Follow existing test patterns
-
-### Tooling
-
-- Use project's existing build system
-- Use project's test framework
-- Use project's formatter/linter settings
-- Don't introduce new tools without strong justification
-
-## Quality Gates
-
-### Definition of Done
-
-- [ ] Tests written and passing
-- [ ] Code follows project conventions
-- [ ] No linter/formatter warnings
-- [ ] Commit messages are clear
-- [ ] Implementation matches plan
-- [ ] No TODOs without issue numbers
-
-### Test Guidelines
-
-- Test behavior, not implementation
-- One assertion per test when possible
-- Clear test names describing scenario
-- Use existing test utilities/helpers
-- Tests should be deterministic
-
-## Important Reminders
-
-**NEVER**:
-- Use `--no-verify` to bypass commit hooks
-- Disable tests instead of fixing them
-- *Commit code yourself*
-- Make assumptions - verify with existing code
-
-**ALWAYS**:
-- Commit working code incrementally
-- Update plan documentation as you go
-- Learn from existing implementations
-- Stop after 3 failed attempts and reassess
-- *Let the user commit changes*

Makefile

@@ -2,7 +2,7 @@
 all: clean-container build-linux-debug-container
 
 build-container:
-	./flutterw --build
+	./flutterw --build-container
 
 clean-container: build-container
 	./flutterw clean

README.md

@@ -2,135 +2,9 @@ https://github.com/Shahxad-Akram/flutter_tex/blob/master/example/lib/tex_view_ma
 
 # Math Formulae Manager
 
-A comprehensive command-line application for managing and computing mathematical formulas across various disciplines including mathematics, physics, medicine, and engineering.
-
 This project uses dart language, and flutter framework. It leverages d4rt library to execute formulas.
 
 
 # Development guidelines
 If you are a contributor or an agent, please follow [CLAUDE.md](./CLAUDE.md) for development guidelines.
 
-# Formula file description
-
-The file is a dart array of formulas. Each formula is a dart set literal
-
-```dart
-[
-    {
-        "name": "Newton's second law (scalar)",
-        "input": {
-            "m" : {
-               "magnitude": "mass"
-            },
-            "a" : {
-               "magnitude": "acceleration"
-            }
-        },
-        "output": {
-            "F" : {
-                "magnitude" : "Force"
-            }
-        },
-        "d4rt_code": "F = m*a;"
-        
-    },
-    {
-        "name": 'Triangle rectangle',
-        "input": [
-          'b':{ "magnitude": 'meter'},
-          'c':{ "magnitude": 'meter'},
-        ],
-        "output": { 'a': { "magnitude": 'meter' } },
-        "d4rtCode": '''
-              a = Math.sqrt(b*b + c*c);
-          ''',
-    }
-]
-```
-
-# Unit file description
-
-```dart
-[
-  {
-    "name": 'meter',
-    "symbol": 'm',
-    "isBase": true
-  },
-  {
-    "name": 'inch',
-    "symbol" 'in',
-    "baseUnit": 'meter',
-    "factor": 0.0254
-  },
-  {
-    "name": 'nautical mile',
-    "symbol": 'Nm',
-    "baseUnit": 'meter',
-    "factor": 1852
-  },
-  {
-    "name": 'Kelvin',
-    "symbol": "Kº",
-    "isBase": true,
-  },
-  {
-    "name": 'Celsius',
-    "symbol": "Cº",
-    "baseUnit" : "Kelvin",
-    "toBase": "x + 273.15",
-    "fromBase": "x - 273.15"
-  },
-  {
-    "name": 'Fahrenheit',
-    "symbol": "Fº",
-    "baseUnit" : "Kelvin",
-    "toBase": "(x - 32) × 5/9 + 273.15",
-    "fromBase": "x - 273.15) * 9/5 + 32"
-  }
-]
-```
-
-## Features
-
-### Formula Search and Computation
-- Search through a vast collection of formulas from multiple domains:
-  - Mathematics
-  - Physics
-  - Medical sciences
-  - Engineering
-  - And more!
-- Input values for formula variables
-- Get computed results with proper units
-
-### Unit Management
-- Each data value includes its magnitude and unit
-- Convert between different units seamlessly
-- Automatic unit validation and conversion
-
-### Formula Editor
-- Built-in formula editor using the d4rt interpreter
-- Create and modify formulas with ease
-- Syntax highlighting and validation
-
-### Formula Sharing
-- Share formulas with other users
-- Import formulas from the community
-- Collaborative formula database
-
-### Rich Formula Documentation
-Each formula includes:
-- **The formula itself** - Mathematical expression
-- **Explanation** - Detailed description in Markdown format
-- **Images** - Visual diagrams, graphs, or illustrations
-- **Examples** - Sample calculations and use cases
-
-## Getting Started
-
-This project uses `flutter`, so a valid installation is needed in order to build it.
-
-For convenience, a containerized build is provided. It is based on `podman` and `podman-compose`. See [Makefile](Makefile) for details.
-
-## Contributing
-
-[Contribution guidelines to be added]

flutterw

@@ -113,7 +113,7 @@ exec_in_container(){
 main(){
     detect_container
 
-    if [ "$1" = "--build" ]; then
+    if [ "$1" = "--build-container" ]; then
         build_image
         return $?
     elif [ "$1" = "--cleancache" ]; then
@@ -123,7 +123,7 @@ main(){
         exec_in_container ${@:2}
         return $?
     elif [ "$1" = "" ] || [ "$1" = "--help" ]  || [ "$1" = "-h" ]; then    
-         echo "Usage: $0 {build|cleancache|exec <command>}"
+         echo "Usage: $0 {--help|--build-container|--cleancache|--exec <command>|<flutter args>}"
          return 1
     fi
     

lib/formula_evaluator.dart

@@ -116,19 +116,39 @@ class FormulaEvaluator {
 
   void _validateInputValues(Formula formula, Map<String, dynamic> inputValues) {
     final missingVars = <String>[];
-    
+
     for (final inputVar in formula.inputVarNames()) {
       if (!inputValues.containsKey(inputVar)) {
         missingVars.add(inputVar);
       }
     }
-    
+
     if (missingVars.isNotEmpty) {
       throw FormulaEvaluationException(
         'Missing required input variables for formula "${formula.name}": '
         '${missingVars.join(', ')}',
       );
     }
+
+    // Validate that input values are in the allowed values list if specified
+    for (final vs in formula.input) {
+      final values = vs.values;
+      if (values != null && values.isNotEmpty) {
+        final inputValue = inputValues[vs.name];
+        if (inputValue != null) {
+          // Convert input value to string for comparison since allowed values are stored as strings
+          final inputValueAsString = inputValue.toString();
+          final containsValue = values.any((allowedValue) => allowedValue.toString() == inputValueAsString);
+          
+          if (!containsValue) {
+            throw FormulaEvaluationException(
+              'Invalid value for variable "${vs.name}" in formula "${formula.name}". '
+              'Expected one of: [${values.join(', ')}], but got: $inputValue',
+            );
+          }
+        }
+      }
+    }
   }
 
 

test/formula_evaluator_test.dart

@@ -141,6 +141,22 @@ void main() {
         );
       });
 
+      test('throws exception for invalid values when allowed values are specified', () {
+        final formula = Formula(
+          name: 'Test formula with allowed values',
+          input: [
+            VariableSpec(name: 'status', unit: 'string', values: ['active', 'inactive']),
+          ],
+          output: VariableSpec(name: 'result', unit: 'string'),
+          d4rtCode: 'result = status;',
+        );
+
+        expect(
+          () => evaluator.evaluate(formula, {'status': 'invalid_value'}), // Not in allowed values
+          throwsA(isA<FormulaEvaluationException>()),
+        );
+      });
+
     });
 
     group('Utility methods', () {

test/formula_models_test.dart

@@ -120,15 +120,77 @@ void main() {
       final evaluator = FormulaEvaluator();
 
       final result = evaluator.evaluate(formula, {
-        'HeartRate': 2,
+        'HeartRate': '> 100 bpm',
-        'Breathing': 2,
+        'Breathing': 'Strong, robust cry',
-        'MuscleTone': 2,
+        'MuscleTone': 'Flexed arms/leg, resists extension',
-        'Reflexes': 2,
+        'Reflexes': 'Cry on stimulation',
-        'SkinColor': 2
+        'SkinColor': 'Pink'
       });
 
       expect(result, 'Score: 10 - Normal');
     });
+
+    test('evaluates APGAR score formula - Good condition case', () async {
+      final corpus = await testCorpus;
+      final formula = corpus.getFormula("Apgar Score")!;
+      final evaluator = FormulaEvaluator();
+
+      final result = evaluator.evaluate(formula, {
+        'HeartRate': '> 100 bpm',  // 2
+        'Breathing': 'Strong, robust cry',  // 2
+        'MuscleTone': 'Some',  // 1
+        'Reflexes': 'Grimace on aggressive stimulation',  // 1
+        'SkinColor': 'Blue extremities, pink body'  // 1
+      });
+
+      expect(result, 'Score: 7 - Normal');
+    });
+
+    test('evaluates APGAR score formula - Needs assistance case', () async {
+      final corpus = await testCorpus;
+      final formula = corpus.getFormula("Apgar Score")!;
+      final evaluator = FormulaEvaluator();
+
+      final result = evaluator.evaluate(formula, {
+        'HeartRate': '> 100 bpm',  // 2
+        'Breathing': 'Weak, irregular',  // 1
+        'MuscleTone': 'Some',  // 1
+        'Reflexes': 'Grimace on aggressive stimulation',  // 1
+        'SkinColor': 'Blue extremities, pink body'  // 1
+      });
+
+      expect(result, 'Score: 6 - Needs assistance');
+    });
+
+    test('evaluates APGAR score formula - Critical condition case', () async {
+      final corpus = await testCorpus;
+      final formula = corpus.getFormula("Apgar Score")!;
+      final evaluator = FormulaEvaluator();
+
+      final result = evaluator.evaluate(formula, {
+        'HeartRate': 'Absent',  // 0
+        'Breathing': 'Absent',  // 0
+        'MuscleTone': 'None',  // 0
+        'Reflexes': 'No response',  // 0
+        'SkinColor': 'Blue or pale'  // 0
+      });
+
+      expect(result, 'Score: 0 - Critical condition');
+    });
+
+    test('evaluates APGAR score formula - Invalid value throws exception', () async {
+      final corpus = await testCorpus;
+      final formula = corpus.getFormula("Apgar Score")!;
+      final evaluator = FormulaEvaluator();
+
+      expect(() => evaluator.evaluate(formula, {
+        'HeartRate': 'Invalid Value',  // Not in allowed values
+        'Breathing': 'Absent',  // 0
+        'MuscleTone': 'None',  // 0
+        'Reflexes': 'No response',  // 0
+        'SkinColor': 'Blue or pale'  // 0
+      }), throwsA(isA<FormulaEvaluationException>()));
+    });
   });
 
 }

units-and-formulas-definition.md

@@ -1,111 +0,0 @@
-# Units and Formulas Definition Format
-
-## Units Specification
-
-Units are defined in `.d4rt.units` files using JSON arrays. Each unit can have:
-
-```dart
-{
-  "name": "unit name",      // Full name (required)
-  "symbol": "abbr",         // Symbol (required)
-  "isBase": true,           // Mark as base unit (exclusive with baseUnit)
-  "baseUnit": "parent",     // Reference unit for conversions
-  "factor": 1.0,           // Conversion factor to base unit
-  "toBase": "x * 1000",     // Conversion code to base (expression)
-  "fromBase": "x / 1000"    // Conversion code from base (expression)
-}
-```
-
-### Key Rules:
-1. Use either `isBase` OR `baseUnit`+conversion (factor or code)
-2. Factor-based units use simple multiplicative conversions
-3. Code-based units require both `toBase` and `fromBase` Dart expressions
-4. Code expressions:
-   - Use `x` as input variable
-   - Must return a numeric value
-   - Can use math functions via `dart:math`
-
-### Examples:
-**Simple Factor-based:**
-```json
-{
-  "name": "kilometer",
-  "symbol": "km",
-  "baseUnit": "meter",
-  "factor": 1000
-}
-```
-
-**Code-based Conversion:**
-```json
-{
-  "name": "Fahrenheit",
-  "symbol": "°F", 
-  "baseUnit": "Kelvin",
-  "toBase": "(x - 32) * 5/9 + 273.15",
-  "fromBase": "(x - 273.15) * 9/5 + 32"
-}
-```
-
-## Formulas Specification
-
-Formulas are defined in `.d4rt` files using JSON arrays. Each formula has:
-
-```dart
-{
-  "name": "Formula Name",       // Required
-  "description": "Markdown",    // Optional
-  "input": [                    // List of input variables
-    {
-      "name": "varName",        // Variable identifier
-      "unit": "unitName"        // Base unit for calculations
-    }
-  ],
-  "output": {                   // Single output variable
-    "name": "resultVar",
-    "unit": "outputUnit"  
-  },
-  "d4rtCode": "Dart code",      // Calculation logic
-  "tags": ["physics", "energy"] // Categories
-}
-```
-
-### Formula Code Rules:
-1. Input variables are declared as `final`
-2. Output variable must be assigned
-3. Can use:
-   - Basic math operators
-   - `dart:math` functions
-   - Custom functions from FormulaEvaluator
-4. Example:
-```dart
-// Inputs: m (kg), v (m/s)
-d4rtCode: "KE = 0.5 * m * pow(v, 2);"
-```
-
-### Conversion Code Examples
-
-**Expression-style:**
-```dart
-// Simple factor conversion
-final x = 5; // Value in source unit
-main() => x * 1000; // Convert to base unit
-```
-
-**Statement-style:**
-```dart 
-// Complex conversion with multiple steps
-final x = 212; // Fahrenheit
-main() {
-  var celsius = (x - 32) * 5/9;
-  return celsius + 273.15; // Convert to Kelvin
-}
-```
-
-## Validation Rules
-
-1. Units must form a DAG (no circular dependencies)
-2. Formulas must declare all input variables
-3. Output variable must be assigned in d4rtCode
-4. Unit conversion code must handle numeric inputs
-5. Base units must exist before derived units