"use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
0 && (module.exports = {
    Meta: null,
    MetaFilter: null,
    MultiMeta: null
});
function _export(target, all) {
    for(var name in all)Object.defineProperty(target, name, {
        enumerable: true,
        get: all[name]
    });
}
_export(exports, {
    Meta: function() {
        return Meta;
    },
    MetaFilter: function() {
        return MetaFilter;
    },
    MultiMeta: function() {
        return MultiMeta;
    }
});
const _react = /*#__PURE__*/ _interop_require_default(require("react"));
const _nonnullable = require("../../non-nullable");
function _interop_require_default(obj) {
    return obj && obj.__esModule ? obj : {
        default: obj
    };
}
function Meta({ name, property, content, media }) {
    if (typeof content !== "undefined" && content !== null && content !== "") {
        return /*#__PURE__*/ _react.default.createElement("meta", {
            ...name ? {
                name
            } : {
                property
            },
            ...media ? {
                media
            } : undefined,
            content: typeof content === "string" ? content : content.toString()
        });
    }
    return null;
}
function MetaFilter(items) {
    const acc = [];
    for (const item of items){
        if (Array.isArray(item)) {
            acc.push(...item.filter(_nonnullable.nonNullable));
        } else if ((0, _nonnullable.nonNullable)(item)) {
            acc.push(item);
        }
    }
    return acc;
}
function camelToSnake(camelCaseStr) {
    return camelCaseStr.replace(/([A-Z])/g, function(match) {
        return "_" + match.toLowerCase();
    });
}
function getMetaKey(prefix, key) {
    // Use `twitter:image` and `og:image` instead of `twitter:image:url` and `og:image:url`
    // to be more compatible as it's a more common format
    if ((prefix === "og:image" || prefix === "twitter:image") && key === "url") {
        return prefix;
    }
    if (prefix.startsWith("og:") || prefix.startsWith("twitter:")) {
        key = camelToSnake(key);
    }
    return prefix + ":" + key;
}
function ExtendMeta({ content, namePrefix, propertyPrefix }) {
    if (!content) return null;
    return MetaFilter(Object.entries(content).map(([k, v])=>{
        return typeof v === "undefined" ? null : Meta({
            ...propertyPrefix && {
                property: getMetaKey(propertyPrefix, k)
            },
            ...namePrefix && {
                name: getMetaKey(namePrefix, k)
            },
            content: typeof v === "string" ? v : v == null ? void 0 : v.toString()
        });
    }));
}
function MultiMeta({ propertyPrefix, namePrefix, contents }) {
    if (typeof contents === "undefined" || contents === null) {
        return null;
    }
    return MetaFilter(contents.map((content)=>{
        if (typeof content === "string" || typeof content === "number" || content instanceof URL) {
            return Meta({
                ...propertyPrefix ? {
                    property: propertyPrefix
                } : {
                    name: namePrefix
                },
                content
            });
        } else {
            return ExtendMeta({
                namePrefix,
                propertyPrefix,
                content
            });
        }
    }));
}

//# sourceMappingURL=meta.js.map