SAE32_2024/src/fr/monlouyan/bakefile/Rule.java

package fr.monlouyan.bakefile;

import java.io.File;
import java.util.List;

public class Rule {
    private String name;
    private List<String> dependencies;
    private List<String> commands;
    private boolean isPhony;

    public Rule(String name, List<String> dependencies, List<String> commands, boolean isPhony) {
        this.name = name;
        this.dependencies = dependencies;
        this.commands = commands;
        this.isPhony = isPhony;
    }

    public String getName() { return name; }
    public List<String> getDependencies() { return dependencies; }
    public List<String> getCommands() { return commands; }
    public boolean isPhony() { return isPhony; }
    public boolean isEmpty() { return dependencies.isEmpty() && commands.isEmpty(); }

    public boolean needsUpdate() {
        if (BakeCLI.isDebug()){
            System.out.println("Debug : Checking if rule " + name + " needs update");
        }

        // Les règles phony sont toujours mises à jour
        if (isPhony) {
            if (BakeCLI.isDebug()) {
                System.out.println("Debug : Rule " + name + " is phony, always needs update");
            }
            return true;
        }

        // Si la règle n'a pas de commandes, on vérifie seulement si une dépendance doit être mise à jour
        if (commands.isEmpty()) {
            for (String dependency : dependencies) {
                File depFile = new File(dependency);
                if (!depFile.exists() && !dependency.isEmpty() && !BakeEngine.hasRule(dependency)) {
                    System.out.println("bake: *** No rule to make target '" + dependency + "', needed by '" + name + "'.  Stop.");
                    System.exit(1);
                }
                Rule depRule = BakeEngine.getRule(dependency);
                if (depRule != null && depRule.needsUpdate()) {
                    if (BakeCLI.isDebug()) {
                        System.out.println("Debug : Dependency rule " + dependency + " needs update");
                    }
                    return true;
                }
            }
            return false;
        }

        // Pour les règles avec des commandes, on vérifie aussi les timestamps
        File targetFile = new File(name);
        if (BakeCLI.isDebug()){
            System.out.println("Debug : Checking if target file " + name + " exist and is up to date");
        }

        long targetTimestamp = targetFile.exists() ? TimestampManager.getTimestamp(targetFile) : 0;
        
        if (BakeCLI.isDebug()) {
            System.out.println("Debug : Target file '" + name + "' last modified at " + TimestampManager.formatTimestamp(targetTimestamp));
        }
    
        for (String dependency : dependencies) {
            File depFile = new File(dependency);
            long depTimestamp = depFile.exists() ? TimestampManager.getTimestamp(depFile) : 0;

            if (BakeCLI.isDebug()) {
                System.out.println("Debug : Dependency '" + dependency + "' last modified at " + TimestampManager.formatTimestamp(depTimestamp));
            }

            // Vérifier si une règle existe pour cette dépendance
            boolean hasRule = BakeEngine.hasRule(dependency);

            if (!depFile.exists() && !dependency.isEmpty() && !hasRule) {
                System.out.println("bake: *** No rule to make target '" + dependency + "', needed by '" + name + "'.  Stop.");
                System.exit(1);
            }

            // Si la dépendance est une règle et qu'elle a besoin d'être mise à jour
            Rule depRule = BakeEngine.getRule(dependency);
            if (depRule != null && depRule.needsUpdate()) {
                if (BakeCLI.isDebug()) {
                    System.out.println("Debug : Dependency rule " + dependency + " needs update");
                }
                return true;
            }

            // Vérifier les timestamps seulement si le fichier existe
            if (depFile.exists() && TimestampManager.getTimestamp(depFile) > targetTimestamp) {
                if (BakeCLI.isDebug()) {
                    System.out.println("Debug : Dependency " + dependency + " is newer than target file " + name + ", needs update");
                }
                return true;
            }
        }
        return false;
    }
}