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refactor(file): minimize code for readFile

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This commit is contained in:
Ibby Hadeed 2017-05-05 15:07:54 -04:00
parent 134eab2dcc
commit b2d07b43cc
1 changed files with 11 additions and 95 deletions
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106
src/@ionic-native/plugins/file/index.ts
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@ -821,37 +821,9 @@ export class File extends IonicNativePlugin {
*/
@CordovaCheck()
readAsText(path: string, file: string): Promise<string> {
if ((/^\//.test(file))) {
let err = new FileError(5);
err.message = 'file-name cannot start with \/';
return Promise.reject<any>(err);
}
return this.resolveDirectoryUrl(path)
.then((directoryEntry: DirectoryEntry) => {
return this.getFile(directoryEntry, file, { create: false });
})
.then((fileEntry: FileEntry) => {
let reader = new FileReader();
return new Promise<string>((resolve, reject) => {
reader.onloadend = () => {
if (reader.result !== undefined || reader.result !== null) {
resolve(<string>reader.result);
} else if (reader.error !== undefined || reader.error !== null) {
reject(reader.error);
} else {
reject({ code: null, message: 'READER_ONLOADEND_ERR' });
}
};
fileEntry.file(file => {
reader.readAsText(file);
}, error => {
reject(error);
});
});
});
return this.readFile<string>(path, file, 'Text');
}
/**
* Read file and return data as a base64 encoded data url.
* A data url is of the form:
@ -863,78 +835,18 @@ export class File extends IonicNativePlugin {
*/
@CordovaCheck()
readAsDataURL(path: string, file: string): Promise<string> {
if ((/^\//.test(file))) {
let err = new FileError(5);
err.message = 'file-name cannot start with \/';
return Promise.reject<any>(err);
}
return this.resolveDirectoryUrl(path)
.then((directoryEntry: DirectoryEntry) => {
return this.getFile(directoryEntry, file, { create: false });
})
.then((fileEntry: FileEntry) => {
let reader = new FileReader();
return new Promise<string>((resolve, reject) => {
reader.onloadend = () => {
if (reader.result !== undefined || reader.result !== null) {
resolve(<string>reader.result);
} else if (reader.error !== undefined || reader.error !== null) {
reject(reader.error);
} else {
reject({ code: null, message: 'READER_ONLOADEND_ERR' });
}
};
fileEntry.file(file => {
reader.readAsDataURL(file);
}, error => {
reject(error);
});
});
});
return this.readFile<string>(path, file, 'DataURL');
}
/**
* Read file and return data as a binary data.
* @param {string} path Base FileSystem. Please refer to the iOS and Android filesystems above
* @param {string} file Name of file, relative to path.
* @returns {Promise<string>} Returns a Promise that resolves with the contents of the file as string rejects with an error.
*/
@CordovaCheck()
readAsBinaryString(path: string, file: string): Promise<string> {
if ((/^\//.test(file))) {
let err = new FileError(5);
err.message = 'file-name cannot start with \/';
return Promise.reject<any>(err);
}
return this.resolveDirectoryUrl(path)
.then((directoryEntry: DirectoryEntry) => {
return this.getFile(directoryEntry, file, { create: false });
})
.then((fileEntry: FileEntry) => {
let reader = new FileReader();
return new Promise<string>((resolve, reject) => {
reader.onloadend = () => {
if (reader.result !== undefined || reader.result !== null) {
resolve(<string>reader.result);
} else if (reader.error !== undefined || reader.error !== null) {
reject(reader.error);
} else {
reject({ code: null, message: 'READER_ONLOADEND_ERR' });
}
};
fileEntry.file(file => {
reader.readAsBinaryString(file);
}, error => {
reject(error);
});
});
});
return this.readFile<string>(path, file, 'BinaryString');
}
/**
@ -945,6 +857,10 @@ export class File extends IonicNativePlugin {
*/
@CordovaCheck()
readAsArrayBuffer(path: string, file: string): Promise<ArrayBuffer> {
return this.readFile<ArrayBuffer>(path, file, 'ArrayBuffer');
}
private readFile<T>(path: string, file: string, readAs: 'ArrayBuffer' | 'BinaryString' | 'DataURL' | 'Text'): Promise<T> {
if ((/^\//.test(file))) {
let err = new FileError(5);
err.message = 'file-name cannot start with \/';
@ -957,10 +873,10 @@ export class File extends IonicNativePlugin {
})
.then((fileEntry: FileEntry) => {
let reader = new FileReader();
return new Promise<ArrayBuffer>((resolve, reject) => {
return new Promise<T>((resolve, reject) => {
reader.onloadend = () => {
if (reader.result !== undefined || reader.result !== null) {
resolve(<ArrayBuffer>reader.result);
resolve(<T><any>reader.result);
} else if (reader.error !== undefined || reader.error !== null) {
reject(reader.error);
} else {
@ -969,7 +885,7 @@ export class File extends IonicNativePlugin {
};
fileEntry.file(file => {
reader.readAsArrayBuffer(file);
reader[`readAs${readAs}`].call(null, file);
}, error => {
reject(error);
});