Initial commit

2020-08-23 21:48:06 -05:00
commit 162ce47bc6
57 changed files with 12096 additions and 0 deletions
@@ -0,0 +1,209 @@
+const fs = require("fs");
+const path = require("path");
+
+const SETTINGS_FILE = "../settings.json";
+const FILE_PATH = path.join(`${__dirname}/${SETTINGS_FILE}`);
+const ENCODING = "utf8";
+
+/**
+ * Read the settings.json file
+ *
+ * @param {Object} callbacks
+ * @param {Function} callbacks.successCb
+ * @param {Function} callbacks.errorCb
+ */
+function readSettingsFile({ successCb, errorCb }) {
+  fs.readFile(FILE_PATH, (err, data) => {
+    if (err) {
+      errorCb(err);
+    } else {
+      successCb(JSON.parse(data));
+    }
+  });
+}
+
+/**
+ * Creates a `settings.json` file
+ *
+ * @param {Object} req
+ * @param {Object} [req.body]
+ * @param {Object} res
+ */
+function createSettingsFile(req, res) {
+  const contents = req.body || {};
+
+  if (fs.existsSync(FILE_PATH)) {
+    return res.status(409).json("settings file already exists").end();
+  } else {
+    fs.writeFile(FILE_PATH, JSON.stringify(contents), ENCODING, (err) => {
+      if (err) {
+        return res.status(500).json(err).end();
+      } else {
+        return res.status(201).json(contents).end();
+      }
+    });
+  }
+}
+
+/**
+ * Return the settings.json file
+ */
+function getSettings(req, res) {
+  if (!fs.existsSync(FILE_PATH)) {
+    return res.status(404).json("settings.json not found!").end();
+  }
+
+  readSettingsFile({
+    successCb: (data) => {
+      return res.status(200).json(data).end();
+    },
+    errorCb: (err) => {
+      return res.status(500).end();
+    },
+  });
+}
+
+/**
+ * Sets a single setting. Creates a new `settings.json` file if none exists.
+ *
+ * @param {Object} req
+ * @param {Object} res
+ */
+function setSetting(req, res) {
+  const { key, val } = req.body;
+  if (!key || !val) {
+    return res.status(400).json("You must supply a key and val").end();
+  }
+
+  /**
+   * Writes file contents
+   *
+   * @param {Object} newSettings
+   * @param {Boolean} [newFile] If file is new
+   */
+  const writeContents = (newSettings, newFile) => {
+    fs.writeFile(FILE_PATH, JSON.stringify(newSettings), ENCODING, (err) => {
+      if (err) {
+        return res.status(500).json(err).end();
+      } else {
+        return res
+          .status(newFile ? 201 : 200)
+          .json(newSettings)
+          .end();
+      }
+    });
+  };
+
+  /**
+   * Read success callback
+   *
+   * @param {Object} currentSettings
+   */
+  const readSuccess = (currentSettings) => {
+    const newSettings = {
+      ...currentSettings,
+      [key]: val,
+    };
+    writeContents(newSettings);
+  };
+
+  /**
+   * Read error callback
+   *
+   * @param {Object} [err]
+   */
+  const readError = (err) => {
+    return res.status(500).json(err).end();
+  };
+
+  if (!fs.existsSync(FILE_PATH)) {
+    writeContents({ [key]: val }, true);
+  } else {
+    readSettingsFile({
+      successCb: readSuccess,
+      errorCb: readError,
+    });
+  }
+}
+
+function replaceSettings(req, res) {
+  const { body } = req;
+  if (!body) {
+    return res.status(400).json("You must provide settings contents").end();
+  }
+  const fileExists = fs.existsSync(FILE_PATH);
+
+  fs.writeFile(FILE_PATH, JSON.stringify(body), ENCODING, (err) => {
+    if (err) {
+      return res.status(500).json(err).end();
+    } else {
+      return res
+        .status(fileExists ? 200 : 201)
+        .json(body)
+        .end();
+    }
+  });
+}
+
+/**
+ * Deletes a specific setting
+ *
+ * @param {Object} req
+ * @param {Object} req.query
+ * @param {Object} req.query.key The key to be deleted
+ * @param {Object} res
+ */
+function deleteSetting(req, res) {
+  const { key } = req.query;
+  if (!key) {
+    return res.status(400).json("You must supply a key to delete").end();
+  }
+
+  /**
+   * Read success callback
+   *
+   * @param {Object} currentSettings
+   */
+  const readSuccess = (currentSettings) => {
+    if (!Object.prototype.hasOwnProperty.call(currentSettings, key)) {
+      return res.status(404).end();
+    }
+
+    delete currentSettings[key];
+
+    fs.writeFile(
+      FILE_PATH,
+      JSON.stringify(currentSettings),
+      ENCODING,
+      (err) => {
+        if (err) {
+          return res.status(500).json(err).end();
+        } else {
+          return res.status(200).json(currentSettings).end();
+        }
+      }
+    );
+  };
+
+  /**
+   * Error callback
+   *
+   * @param {Object} err
+   */
+  const readError = (err) => {
+    return res.status(500).json(err).end();
+  };
+
+  readSettingsFile({
+    successCb: readSuccess,
+    errorCb: readError,
+  });
+}
+
+module.exports = {
+  getSettings,
+  setSetting,
+  deleteSetting,
+  createSettingsFile,
+  replaceSettings,
+};