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file-manager.js
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file-manager.js
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"use strict";
const locreq = require("locreq")(__dirname);
const { promisify } = require("util");
const UUIDGenerator = require("shortid");
const path = require("path");
const fs = require("fs");
const File = locreq("lib/data-structures/file.js");
function FileManager(datastore, logger, upload_path) {
this.datastore = datastore;
this.logger = logger;
this.upload_path = upload_path;
if (!fs.existsSync(this.upload_path)) {
fs.mkdirSync(this.upload_path);
}
}
FileManager.pure = {
save_file: function(datastore, upload_path, file) {
const newID = UUIDGenerator();
const upload_path_with_sealious_name = `${upload_path}/${newID}`;
return promisify(fs.writeFile)(
upload_path_with_sealious_name,
file.data
)
.then(function() {
const file_database_entry = {
original_name: file.filename,
creation_context: file.context,
id: newID,
mime_type: file.mime,
};
return datastore.insert("files", file_database_entry, {});
})
.then(function() {
return {
id: newID,
filename: file.filename,
};
});
},
find: function(datastore, upload_path, context, query) {
return datastore.find("files", query).then(function(documents) {
const parsed_documents = documents.map(function(document) {
const ret = File.from_db_entry(document);
ret.path_on_hdd = path.resolve(upload_path, `./${ret.id}`);
return ret;
});
return Promise.resolve(parsed_documents);
});
},
get_by_id: function(datastore, upload_path, context, file_id) {
return FileManager.pure
.find(datastore, upload_path, context, { id: file_id })
.then(function(file_array) {
return Promise.resolve(file_array[0]);
});
},
};
FileManager.prototype = {
save_file(file) {
return FileManager.pure.save_file(
this.datastore,
this.upload_path,
file
);
},
find(context, query) {
return FileManager.pure.find(
this.datastore,
this.upload_path,
context,
query
);
},
};
module.exports = FileManager;

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