@typeheim/orm-on-fire/src/Functions/TextIndexGenerator.js

Firestore ORM

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TextIndexGenerator = void 0;
class TextIndexGenerator {
    buildMetadata(config, change) {
        if (!change.after.exists) {
            return null;
        }
        const document = change.after.data();
        const oldDocument = change.before.data();
        let indexFields = [];
        if (config.recalculateOnSave) {
            indexFields = config.fields;
        }
        else {
            config.fields.forEach(fieldName => {
                if (!change.before.exists) {
                    indexFields.push(fieldName);
                }
                else if (document[fieldName] !== oldDocument[fieldName]) {
                    indexFields.push(fieldName);
                }
            });
        }
        if (indexFields.length < 1) {
            return null;
        }
        return this.generateIndex(document, indexFields);
    }
    generateIndex(data, fields) {
        let metadata = {};
        fields.forEach(fieldName => {
            if (data[fieldName] !== undefined) {
                metadata[`idx__txt__${fieldName}`] = this.createTextIndex(data[fieldName]);
                metadata[`idx__rtxt__${fieldName}`] = this.createReverseTextIndex(data[fieldName]);
            }
            else {
                metadata[`idx__txt__${fieldName}`] = [];
                metadata[`idx__rtxt__${fieldName}`] = [];
            }
        });
        return metadata;
    }
    createTextIndex(text) {
        const arrName = [];
        let curName = '';
        text.split('').forEach(letter => {
            curName += letter.toLowerCase();
            arrName.push(curName);
        });
        return arrName;
    }
    createReverseTextIndex(text) {
        const arrName = [];
        let curName = '';
        text.split('').reverse().forEach(letter => {
            curName += letter.toLowerCase();
            arrName.push(curName);
        });
        return arrName;
    }
}
exports.TextIndexGenerator = TextIndexGenerator;
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