Method openThemeFile

src/core/theme.cpp:20–112

    return &LittleFS; // always get back to safety
}
bool BruceTheme::openThemeFile(FS *fs, String filepath, bool overwriteConfigSettings) {

    if (fs == nullptr) return true;
    if (!fs->exists(filepath)) return false;
    File file;
    file = fs->open(filepath, FILE_READ);
    if (!file) {
        log_e("THEME: %s. Using default theme", "Theme file not found");
        removeTheme();
        return false;
    }

    // Deserialize the JSON document
    JsonDocument jsonDoc;
    if (deserializeJson(jsonDoc, file)) {
        displayError("5", true);
        log_e("THEME: %s. Using default theme", "Failed reading theme file");
        removeTheme();
        return false;
    }
    themePath = filepath;
    String baseThemePath = themePath.substring(0, themePath.lastIndexOf('/')) + "/";

    ThemeEntry entries[] = {
        {"wifi",        &theme.wifi,        theme.paths.wifi       },
        {"ble",         &theme.ble,         theme.paths.ble        },
        {"ethernet",    &theme.ethernet,    theme.paths.ethernet   },
        {"rf",          &theme.rf,          theme.paths.rf         },
        {"rfid",        &theme.rfid,        theme.paths.rfid       },
        {"fm",          &theme.fm,          theme.paths.fm         },
        {"ir",          &theme.ir,          theme.paths.ir         },
        {"files",       &theme.files,       theme.paths.files      },
        {"gps",         &theme.gps,         theme.paths.gps        },
        {"nrf",         &theme.nrf,         theme.paths.nrf        },
        {"interpreter", &theme.interpreter, theme.paths.interpreter},
        {"clock",       &theme.clock,       theme.paths.clock      },
        {"others",      &theme.others,      theme.paths.others     },
        {"connect",     &theme.connect,     theme.paths.connect    },
        {"config",      &theme.config,      theme.paths.config     },
        {"boot_img",    &theme.boot_img,    theme.paths.boot_img   },
        {"boot_sound",  &theme.boot_sound,  theme.paths.boot_sound },
        {"lora",        &theme.lora,        theme.paths.lora       }
    };

    JsonObject _th = jsonDoc.as<JsonObject>();
    for (auto &entry : entries) {
        if (!_th[entry.key].isNull()) {
            String path = baseThemePath + _th[entry.key].as<String>();
            if (fs->exists(path)) {
                *entry.flag = true;
                entry.path = _th[entry.key].as<String>();
                // Pre-cache PNGs into BIN files to avoid runtime decoding and allocations
                if (path.endsWith(".png") || path.endsWith(".PNG")) { preparePngBin(*fs, path); }
            } else {
                log_w("THEME: file not found: %s", entry.key);
            }
        }
    }