MalMZ_EncounterConditions

//=============================================================================
// RPG Maker MZ - Maliki's Encounter Conditions v1.0
//=============================================================================

/*:
 * @target MZ
 * @plugindesc Provides deeper control on what enemy troops are encountered by the player
 * @author Maliki79
 *
 * @help MalMZ_EncounterConditions.js
 *
 * This plugin enables devs to set conditional evals for random encounter troop battles.
 *
 * To start, set up encounters normally.
 * Next, in the Map Notes, use Notetag <encounterEvals: x, code >>>
 * noting the specific spaces and the end of the tag MUST have 3 > signs as shown and the space after the :
 * Let x be the id number of the troop.
 * code is the specific javascript code you are using.
 * Be sure you use code that can eval to true or false.
 *
 * You can use multiple lines to check for a troop.
 * You can also use s[x] or v[x] for game switches and variables respectively.
 *
 * Once set up, when the player starts a random battle, the plugin will check for any evels that are set for the specific Troop Id.
 * If ALL evals for that troop are true, it is then added to the list of POSSIBLE encounters based on your setup in Map Properties.
 * You can have different conditions for the same troop on different maps.
 *
 * Example: <encounterEvals: 7, $gameParty.gold() > 200 >>>
 * Troop Id 7 will only appear if the party has more than 200.
 *
 * Example 2: (Separate lines on the same map property notes)
 * <encounterEvals: 10, s[27] >>>
 * <encounterEvals: 10, $gameParty.highestLevel() < 5 >>>
 * Troop 10 will only appear if game switch 27 is on AND the party's highest level is lower than 5.
 *
 */

Game_Player.prototype.makeEncounterTroopId = function() {
    const encounterList = [];
    let weightSum = 0;
    for (const encounter of $gameMap.encounterList()) {
        if (this.malEncounterCond(encounter)) {
        if (this.meetsEncounterConditions(encounter)) {
            encounterList.push(encounter);
            weightSum += encounter.weight;
        }
    }
    }
    if (weightSum > 0) {
        let value = Math.randomInt(weightSum);
        for (const encounter of encounterList) {
            value -= encounter.weight;
            if (value < 0) {
                return encounter.troopId;
            }
        }
    }
    return 0;
};

Game_Player.prototype.malEncounterCond = function(encounter) {
    var troopId = encounter.troopId;
    var cond = this.encounterCond;
    var s = $gameSwitches._data;
    var v = $gameVariables._data;
    for (var i = 0; i < cond.length; i++) {
        var cond2 = cond[i];
        if (cond2[0] == troopId) {
            var ecEval = cond2[1];
            if(eval(ecEval) == false) return false;
        }
    }
    return true;
};

var malSMStart = Scene_Map.prototype.start
Scene_Map.prototype.start = function() {
    malSMStart.call(this);
    $gamePlayer.setEncountercond();
};

Game_Player.prototype.setEncountercond = function() {
    this.encounterCond = [];
    var noteread = $dataMap.note;
    while(noteread.indexOf("encounterEvals") > -1)
    {
        var notereg = noteread.split("<encounterEvals: ");
        var match = notereg[1].split(">>>");
        var match2 = match[0].split(",");
        match2[0] = Number(match2[0]);
        this.encounterCond.push(match2);
        noteread = noteread.replace("<encounterEvals: ", " ");
    }
};