Function get_constraint

plugins/workflow.cpp:651–772

}

static ItemConstraint *get_constraint(color_ostream &out, const std::string &str, PersistentDataItem *cfg, bool create)
{
    std::vector<std::string> tokens;
    split_string(&tokens, str, "/");

    if (tokens.size() > 4)
        return NULL;

    int weight = 0;

    bool is_craft = false;
    ItemTypeInfo item;

    if (tokens[0] == "ANY_CRAFT" || tokens[0] == "CRAFTS") {
        is_craft = true;
    } else if (!item.find(tokens[0]) || !item.isValid()) {
        out.printerr("Cannot find item type: {}\n", tokens[0]);
        return NULL;
    }

    if (item.subtype >= 0)
        weight += 10000;

    df::dfhack_material_category mat_mask;
    std::string maskstr = vector_get(tokens,1);
    if (!maskstr.empty() && !parseJobMaterialCategory(&mat_mask, maskstr)) {
        out.printerr("Cannot decode material mask: {}\n", maskstr);
        return NULL;
    }

    if (mat_mask.whole != 0)
        weight += 100;

    MaterialInfo material;
    std::string matstr = vector_get(tokens,2);
    if (!matstr.empty() && (!material.find(matstr) || !material.isValid())) {
        out.printerr("Cannot find material: {}\n", matstr);
        return NULL;
    }

    if (material.type >= 0)
        weight += (material.index >= 0 ? 5000 : 1000);

    if (mat_mask.whole && material.isValid() && !material.matches(mat_mask)) {
        out.printerr("Material {} doesn't match mask {}\n", matstr, maskstr);
        return NULL;
    }

    item_quality::item_quality minqual = item_quality::Ordinary;
    bool is_local = false;
    std::string qualstr = vector_get(tokens, 3);

    if(!qualstr.empty())
    {
        std::vector<std::string> qtokens;
        split_string(&qtokens, qualstr, ",");

        for (size_t i = 0; i < qtokens.size(); i++)