10 files changed, 1663 insertions, 0 deletions
diff --git a/Timeline/ClientApp/src/app/http/common.ts b/Timeline/ClientApp/src/app/http/common.ts
new file mode 100644
index 00000000..8fb8eb69
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/common.ts
@@ -0,0 +1,140 @@
+import { AxiosError, AxiosResponse } from 'axios';
+
+export const apiBaseUrl = '/api';
+
+export function base64(blob: Blob): Promise<string> {
+  return new Promise<string>((resolve) => {
+    const reader = new FileReader();
+    reader.onload = function () {
+      resolve((reader.result as string).replace(/^data:.+;base64,/, ''));
+    };
+    reader.readAsDataURL(blob);
+  });
+}
+
+export function extractStatusCode(error: AxiosError): number | null {
+  if (error.isAxiosError) {
+    const code = error?.response?.status;
+    if (typeof code === 'number') {
+      return code;
+    }
+  }
+  return null;
+}
+
+export interface CommonErrorResponse {
+  code: number;
+  message: string;
+}
+
+export function extractErrorCode(
+  error: AxiosError<CommonErrorResponse>
+): number | null {
+  if (error.isAxiosError) {
+    const code = error.response?.data?.code;
+    if (typeof code === 'number') {
+      return code;
+    }
+  }
+  return null;
+}
+
+export class HttpNetworkError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export class NotModified {}
+
+export interface BlobWithEtag {
+  data: Blob;
+  etag: string;
+}
+
+export function extractResponseData<T>(res: AxiosResponse<T>): T {
+  return res.data;
+}
+
+export function catchIfStatusCodeIs<
+  TResult,
+  TErrorHandlerResult extends TResult | PromiseLike<TResult> | null | undefined
+>(
+  statusCode: number,
+  errorHandler: (error: AxiosError<CommonErrorResponse>) => TErrorHandlerResult
+): (error: AxiosError<CommonErrorResponse>) => TErrorHandlerResult {
+  return (error: AxiosError<CommonErrorResponse>) => {
+    if (extractStatusCode(error) == statusCode) {
+      return errorHandler(error);
+    } else {
+      throw error;
+    }
+  };
+}
+
+export function convertToIfStatusCodeIs<NewError>(
+  statusCode: number,
+  newErrorType: {
+    new (innerError: AxiosError): NewError;
+  }
+): (error: AxiosError<CommonErrorResponse>) => never {
+  return catchIfStatusCodeIs(statusCode, (error) => {
+    throw new newErrorType(error);
+  });
+}
+
+export function catchIfErrorCodeIs<
+  TResult,
+  TErrorHandlerResult extends TResult | PromiseLike<TResult> | null | undefined
+>(
+  errorCode: number,
+  errorHandler: (error: AxiosError<CommonErrorResponse>) => TErrorHandlerResult
+): (error: AxiosError<CommonErrorResponse>) => TErrorHandlerResult {
+  return (error: AxiosError<CommonErrorResponse>) => {
+    if (extractErrorCode(error) == errorCode) {
+      return errorHandler(error);
+    } else {
+      throw error;
+    }
+  };
+}
+export function convertToIfErrorCodeIs<NewError>(
+  errorCode: number,
+  newErrorType: {
+    new (innerError: AxiosError): NewError;
+  }
+): (error: AxiosError<CommonErrorResponse>) => never {
+  return catchIfErrorCodeIs(errorCode, (error) => {
+    throw new newErrorType(error);
+  });
+}
+
+export function convertToNetworkError(
+  error: AxiosError<CommonErrorResponse>
+): never {
+  if (error.isAxiosError && error.response == null) {
+    throw new HttpNetworkError(error);
+  } else {
+    throw error;
+  }
+}
+
+export function convertToBlobWithEtag(res: AxiosResponse<Blob>): BlobWithEtag {
+  return {
+    data: res.data,
+    etag: (res.headers as Record<'etag', string>)['etag'],
+  };
+}
+
+export function convertToBlobWithEtagOrNotModified(
+  res: AxiosResponse<Blob>
+): BlobWithEtag | NotModified {
+  if (res.status === 304) {
+    return new NotModified();
+  } else {
+    return {
+      data: res.data,
+      etag: (res.headers as Record<'etag', string>)['etag'],
+    };
+  }
+}
diff --git a/Timeline/ClientApp/src/app/http/mock/common.ts b/Timeline/ClientApp/src/app/http/mock/common.ts
new file mode 100644
index 00000000..11939c2b
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/common.ts
@@ -0,0 +1,48 @@
+import localforage from 'localforage';
+import { SHA1 } from 'crypto-js';
+
+import { HttpNetworkError } from '../common';
+
+export const mockStorage = localforage.createInstance({
+  name: 'mock-backend',
+  description: 'Database for mock back end.',
+  driver: localforage.INDEXEDDB,
+});
+
+export async function sha1(data: Blob): Promise<string> {
+  const s = await new Promise<string>((resolve) => {
+    const fileReader = new FileReader();
+    fileReader.readAsBinaryString(data);
+    fileReader.onload = () => {
+      resolve(fileReader.result as string);
+    };
+  });
+
+  return SHA1(s).toString();
+}
+
+const disableNetworkKey = 'mockServer.disableNetwork';
+
+let disableNetwork: boolean =
+  localStorage.getItem(disableNetworkKey) === 'true' ? true : false;
+
+Object.defineProperty(window, 'disableNetwork', {
+  get: () => disableNetwork,
+  set: (value) => {
+    if (value) {
+      disableNetwork = true;
+      localStorage.setItem(disableNetworkKey, 'true');
+    } else {
+      disableNetwork = false;
+      localStorage.setItem(disableNetworkKey, 'false');
+    }
+  },
+});
+
+export async function mockPrepare(): Promise<void> {
+  if (disableNetwork) {
+    console.warn('Network is disabled for mock server.');
+    throw new HttpNetworkError();
+  }
+  await Promise.resolve();
+}
diff --git a/Timeline/ClientApp/src/app/http/mock/default-avatar.png b/Timeline/ClientApp/src/app/http/mock/default-avatar.png
new file mode 100644
index 00000000..4086e1d2
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/default-avatar.png
diff --git a/Timeline/ClientApp/src/app/http/mock/install.ts b/Timeline/ClientApp/src/app/http/mock/install.ts
new file mode 100644
index 00000000..66174d41
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/install.ts
@@ -0,0 +1,11 @@
+import { setHttpTokenClient } from '../token';
+import { setHttpUserClient } from '../user';
+import { setHttpTimelineClient } from '../timeline';
+
+import { MockHttpTokenClient } from './token';
+import { MockHttpUserClient } from './user';
+import { MockHttpTimelineClient } from './timeline';
+
+setHttpTokenClient(new MockHttpTokenClient());
+setHttpUserClient(new MockHttpUserClient());
+setHttpTimelineClient(new MockHttpTimelineClient());
diff --git a/Timeline/ClientApp/src/app/http/mock/timeline.ts b/Timeline/ClientApp/src/app/http/mock/timeline.ts
new file mode 100644
index 00000000..2a34ef10
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/timeline.ts
@@ -0,0 +1,600 @@
+import { random, without, range } from 'lodash';
+
+import { BlobWithEtag, NotModified } from '../common';
+import {
+  IHttpTimelineClient,
+  HttpTimelineInfo,
+  TimelineVisibility,
+  HttpTimelineListQuery,
+  HttpTimelineNotExistError,
+  HttpTimelinePostRequest,
+  HttpTimelineNameConflictError,
+  HttpTimelinePatchRequest,
+  HttpTimelinePostInfo,
+  HttpTimelinePostContent,
+  HttpTimelinePostPostRequest,
+  HttpTimelinePostNotExistError,
+  HttpTimelineGenericPostInfo,
+} from '../timeline';
+import { HttpUser } from '../user';
+
+import { mockStorage, sha1, mockPrepare } from './common';
+import { getUser, MockUserNotExistError, checkToken } from './user';
+
+async function getTimelineNameList(): Promise<string[]> {
+  return (await mockStorage.getItem<string[]>('timelines')) ?? [];
+}
+
+async function setTimelineNameList(newOne: string[]): Promise<void> {
+  await mockStorage.setItem<string[]>('timelines', newOne);
+}
+
+type TimelinePropertyKey =
+  | 'uniqueId'
+  | 'owner'
+  | 'description'
+  | 'visibility'
+  | 'members'
+  | 'currentPostId';
+
+function getTimelinePropertyKey(
+  name: string,
+  property: TimelinePropertyKey
+): string {
+  return `timeline.${name}.${property}`;
+}
+
+function getTimelinePropertyValue<T>(
+  name: string,
+  property: TimelinePropertyKey
+): Promise<T> {
+  return mockStorage.getItem<T>(getTimelinePropertyKey(name, property));
+}
+
+function setTimelinePropertyValue<T>(
+  name: string,
+  property: TimelinePropertyKey,
+  value: T
+): Promise<void> {
+  return mockStorage
+    .setItem<T>(getTimelinePropertyKey(name, property), value)
+    .then();
+}
+
+interface HttpTimelineInfoEx extends HttpTimelineInfo {
+  memberUsernames: string[];
+}
+
+function createUniqueId(): string {
+  const s = 'abcdefghijklmnopqrstuvwxz0123456789';
+  let result = '';
+  for (let i = 0; i < 16; i++) {
+    result += s[random(0, s.length - 1)];
+  }
+  return result;
+}
+
+class MockTimelineNotExistError extends Error {
+  constructor() {
+    super('Timeline not exist.');
+  }
+}
+
+class MockTimelineAlreadyExistError extends Error {
+  constructor() {
+    super('Timeline already exist.');
+  }
+}
+
+async function getTimelineInfo(name: string): Promise<HttpTimelineInfoEx> {
+  let owner: HttpUser;
+  if (name.startsWith('@')) {
+    const ownerUsername = name.substr(1);
+    owner = await getUser(ownerUsername);
+    const optionalUniqueId = await getTimelinePropertyValue<string | null>(
+      name,
+      'uniqueId'
+    );
+    if (optionalUniqueId == null) {
+      await setTimelineNameList([...(await getTimelineNameList()), name]);
+      await setTimelinePropertyValue(name, 'uniqueId', createUniqueId());
+    }
+  } else {
+    const optionalOwnerUsername = await getTimelinePropertyValue<string | null>(
+      name,
+      'owner'
+    );
+    if (optionalOwnerUsername == null) {
+      throw new MockTimelineNotExistError();
+    } else {
+      owner = await getUser(optionalOwnerUsername);
+    }
+  }
+
+  const memberUsernames =
+    (await getTimelinePropertyValue<string[] | null>(name, 'members')) ?? [];
+  const members = await Promise.all(
+    memberUsernames.map(async (username) => {
+      return await getUser(username);
+    })
+  );
+
+  return {
+    name,
+    uniqueId: await getTimelinePropertyValue<string>(name, 'uniqueId'),
+    owner,
+    description:
+      (await getTimelinePropertyValue<string | null>(name, 'description')) ??
+      '',
+    visibility:
+      (await getTimelinePropertyValue<TimelineVisibility | null>(
+        name,
+        'visibility'
+      )) ?? 'Register',
+    members,
+    memberUsernames,
+  };
+}
+
+async function createTimeline(name: string, owner: string): Promise<void> {
+  const optionalOwnerUsername = await getTimelinePropertyValue<string | null>(
+    name,
+    'owner'
+  );
+  if (optionalOwnerUsername != null) {
+    throw new MockTimelineAlreadyExistError();
+  }
+
+  await setTimelineNameList([...(await getTimelineNameList()), name]);
+  await setTimelinePropertyValue(name, 'uniqueId', createUniqueId());
+  await setTimelinePropertyValue(name, 'owner', owner);
+}
+
+type TimelinePostPropertyKey =
+  | 'type'
+  | 'data'
+  | 'etag'
+  | 'author'
+  | 'time'
+  | 'lastUpdated';
+
+function getTimelinePostPropertyKey(
+  timelineName: string,
+  id: number,
+  propertyKey: TimelinePostPropertyKey
+): string {
+  return `timeline.${timelineName}.posts.${id}.${propertyKey}`;
+}
+
+function getTimelinePostPropertyValue<T>(
+  timelineName: string,
+  id: number,
+  propertyKey: TimelinePostPropertyKey
+): Promise<T> {
+  return mockStorage.getItem<T>(
+    getTimelinePostPropertyKey(timelineName, id, propertyKey)
+  );
+}
+
+function setTimelinePostPropertyValue<T>(
+  timelineName: string,
+  id: number,
+  propertyKey: TimelinePostPropertyKey,
+  value: T
+): Promise<T> {
+  return mockStorage.setItem(
+    getTimelinePostPropertyKey(timelineName, id, propertyKey),
+    value
+  );
+}
+
+function removeTimelinePostProperty(
+  timelineName: string,
+  id: number,
+  propertyKey: TimelinePostPropertyKey
+): Promise<void> {
+  return mockStorage.removeItem(
+    getTimelinePostPropertyKey(timelineName, id, propertyKey)
+  );
+}
+
+async function getTimelinePostInfo(
+  timelineName: string,
+  id: number
+): Promise<HttpTimelineGenericPostInfo> {
+  const currentPostId = await getTimelinePropertyValue<number | null>(
+    timelineName,
+    'currentPostId'
+  );
+  if (currentPostId == null || id > currentPostId) {
+    throw new HttpTimelinePostNotExistError();
+  }
+
+  const type = await getTimelinePostPropertyValue<string | null>(
+    timelineName,
+    id,
+    'type'
+  );
+
+  if (type == null) {
+    return {
+      id,
+      author: await getUser(
+        await getTimelinePostPropertyValue<string>(timelineName, id, 'author')
+      ),
+      time: new Date(
+        await getTimelinePostPropertyValue<string>(timelineName, id, 'time')
+      ),
+      lastUpdated: new Date(
+        await getTimelinePostPropertyValue<string>(
+          timelineName,
+          id,
+          'lastUpdated'
+        )
+      ),
+      deleted: true,
+    };
+  } else {
+    let content: HttpTimelinePostContent;
+    if (type === 'text') {
+      content = {
+        type: 'text',
+        text: await getTimelinePostPropertyValue(timelineName, id, 'data'),
+      };
+    } else {
+      content = {
+        type: 'image',
+      };
+    }
+
+    return {
+      id,
+      author: await getUser(
+        await getTimelinePostPropertyValue<string>(timelineName, id, 'author')
+      ),
+      time: new Date(
+        await getTimelinePostPropertyValue<string>(timelineName, id, 'time')
+      ),
+      lastUpdated: new Date(
+        await getTimelinePostPropertyValue<string>(
+          timelineName,
+          id,
+          'lastUpdated'
+        )
+      ),
+      content,
+      deleted: false,
+    };
+  }
+}
+
+export class MockHttpTimelineClient implements IHttpTimelineClient {
+  async listTimeline(
+    query: HttpTimelineListQuery
+  ): Promise<HttpTimelineInfo[]> {
+    await mockPrepare();
+    return (
+      await Promise.all(
+        (await getTimelineNameList()).map((name) => getTimelineInfo(name))
+      )
+    ).filter((timeline) => {
+      if (
+        query.visibility != null &&
+        query.visibility !== timeline.visibility
+      ) {
+        return false;
+      }
+      if (query.relate != null) {
+        if (query.relateType === 'own') {
+          if (timeline.owner.username !== query.relate) {
+            return false;
+          }
+        } else if (query.relateType === 'join') {
+          if (!timeline.memberUsernames.includes(query.relate)) {
+            return false;
+          }
+        } else if (
+          timeline.owner.username !== query.relate &&
+          !timeline.memberUsernames.includes(query.relate)
+        ) {
+          return false;
+        }
+      }
+      return true;
+    });
+  }
+
+  async getTimeline(timelineName: string): Promise<HttpTimelineInfo> {
+    await mockPrepare();
+    try {
+      return await getTimelineInfo(timelineName);
+    } catch (e) {
+      if (
+        e instanceof MockTimelineNotExistError ||
+        e instanceof MockUserNotExistError
+      ) {
+        throw new HttpTimelineNotExistError();
+      }
+      throw e;
+    }
+  }
+
+  async postTimeline(
+    req: HttpTimelinePostRequest,
+    token: string
+  ): Promise<HttpTimelineInfo> {
+    await mockPrepare();
+    const user = checkToken(token);
+    try {
+      await createTimeline(req.name, user);
+    } catch (e) {
+      if (e instanceof MockTimelineAlreadyExistError) {
+        throw new HttpTimelineNameConflictError();
+      }
+      throw e;
+    }
+    return await getTimelineInfo(req.name);
+  }
+
+  async patchTimeline(
+    timelineName: string,
+    req: HttpTimelinePatchRequest,
+    _token: string
+  ): Promise<HttpTimelineInfo> {
+    await mockPrepare();
+    if (req.description != null) {
+      await setTimelinePropertyValue(
+        timelineName,
+        'description',
+        req.description
+      );
+    }
+    if (req.visibility != null) {
+      await setTimelinePropertyValue(
+        timelineName,
+        'visibility',
+        req.visibility
+      );
+    }
+    return await getTimelineInfo(timelineName);
+  }
+
+  async deleteTimeline(timelineName: string, _token: string): Promise<void> {
+    await mockPrepare();
+    await setTimelineNameList(
+      without(await getTimelineNameList(), timelineName)
+    );
+    await mockStorage.removeItem(
+      getTimelinePropertyKey(timelineName, 'uniqueId')
+    );
+
+    // TODO: remove other things
+  }
+
+  async memberPut(
+    timelineName: string,
+    username: string,
+    _token: string
+  ): Promise<void> {
+    await mockPrepare();
+    const oldMembers =
+      (await getTimelinePropertyValue<string[] | null>(
+        timelineName,
+        'members'
+      )) ?? [];
+    if (!oldMembers.includes(username)) {
+      await setTimelinePropertyValue(timelineName, 'members', [
+        ...oldMembers,
+        username,
+      ]);
+    }
+  }
+
+  async memberDelete(
+    timelineName: string,
+    username: string,
+    _token: string
+  ): Promise<void> {
+    await mockPrepare();
+    const oldMembers =
+      (await getTimelinePropertyValue<string[] | null>(
+        timelineName,
+        'members'
+      )) ?? [];
+    if (oldMembers.includes(username)) {
+      await setTimelinePropertyValue(
+        timelineName,
+        'members',
+        without(oldMembers, username)
+      );
+    }
+  }
+
+  listPost(
+    timelineName: string,
+    token?: string
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted?: false;
+    }
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted: true;
+    }
+  ): Promise<HttpTimelineGenericPostInfo[]>;
+  async listPost(
+    timelineName: string,
+    _token?: string,
+    query?: {
+      modifiedSince?: Date;
+      includeDeleted?: boolean;
+    }
+  ): Promise<HttpTimelineGenericPostInfo[]> {
+    await mockPrepare();
+    // TODO: Permission check.
+
+    const currentPostId = await getTimelinePropertyValue<number | null>(
+      timelineName,
+      'currentPostId'
+    );
+
+    return (
+      await Promise.all(
+        range(1, currentPostId == null ? 1 : currentPostId + 1).map(
+          async (id) => {
+            return await getTimelinePostInfo(timelineName, id);
+          }
+        )
+      )
+    )
+      .filter((post) => {
+        if (query?.includeDeleted !== true && post.deleted) {
+          return false;
+        }
+        return true;
+      })
+      .filter((post) => {
+        if (query?.modifiedSince != null) {
+          return post.lastUpdated >= query.modifiedSince;
+        }
+        return true;
+      });
+  }
+
+  getPostData(
+    timelineName: string,
+    postId: number,
+    token: string
+  ): Promise<BlobWithEtag>;
+  async getPostData(
+    timelineName: string,
+    postId: number,
+    _token?: string,
+    etag?: string
+  ): Promise<BlobWithEtag | NotModified> {
+    await mockPrepare();
+    // TODO: Permission check.
+
+    const optionalSavedEtag = await getTimelinePostPropertyValue<string>(
+      timelineName,
+      postId,
+      'etag'
+    );
+
+    if (optionalSavedEtag == null) {
+      const optionalType = await getTimelinePostPropertyValue<string>(
+        timelineName,
+        postId,
+        'type'
+      );
+
+      if (optionalType != null) {
+        throw new Error('Post of this type has no data.');
+      } else {
+        throw new HttpTimelinePostNotExistError();
+      }
+    }
+
+    if (etag === optionalSavedEtag) {
+      return new NotModified();
+    }
+
+    return {
+      data: await getTimelinePostPropertyValue<Blob>(
+        timelineName,
+        postId,
+        'data'
+      ),
+      etag: optionalSavedEtag,
+    };
+  }
+
+  async postPost(
+    timelineName: string,
+    req: HttpTimelinePostPostRequest,
+    token: string
+  ): Promise<HttpTimelinePostInfo> {
+    await mockPrepare();
+    const user = checkToken(token);
+
+    const savedId = await getTimelinePropertyValue<number | null>(
+      timelineName,
+      'currentPostId'
+    );
+    const id = savedId ? savedId + 1 : 1;
+    await setTimelinePropertyValue(timelineName, 'currentPostId', id);
+
+    await setTimelinePostPropertyValue(timelineName, id, 'author', user);
+
+    const currentTimeString = new Date().toISOString();
+    await setTimelinePostPropertyValue(
+      timelineName,
+      id,
+      'lastUpdated',
+      currentTimeString
+    );
+
+    await setTimelinePostPropertyValue(
+      timelineName,
+      id,
+      'time',
+      req.time != null ? req.time.toISOString() : currentTimeString
+    );
+
+    const { content } = req;
+    if (content.type === 'text') {
+      await setTimelinePostPropertyValue(timelineName, id, 'type', 'text');
+      await setTimelinePostPropertyValue(
+        timelineName,
+        id,
+        'data',
+        content.text
+      );
+    } else {
+      await setTimelinePostPropertyValue(timelineName, id, 'type', 'image');
+      await setTimelinePostPropertyValue(
+        timelineName,
+        id,
+        'data',
+        content.data
+      );
+      await setTimelinePostPropertyValue(
+        timelineName,
+        id,
+        'etag',
+        await sha1(content.data)
+      );
+    }
+
+    return (await getTimelinePostInfo(
+      timelineName,
+      id
+    )) as HttpTimelinePostInfo;
+  }
+
+  async deletePost(
+    timelineName: string,
+    postId: number,
+    _token: string
+  ): Promise<void> {
+    await mockPrepare();
+    // TODO: permission check
+    await removeTimelinePostProperty(timelineName, postId, 'type');
+    await removeTimelinePostProperty(timelineName, postId, 'data');
+    await removeTimelinePostProperty(timelineName, postId, 'etag');
+    await setTimelinePostPropertyValue(
+      timelineName,
+      postId,
+      'lastUpdated',
+      new Date().toISOString()
+    );
+  }
+}
diff --git a/Timeline/ClientApp/src/app/http/mock/token.ts b/Timeline/ClientApp/src/app/http/mock/token.ts
new file mode 100644
index 00000000..6924e7d7
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/token.ts
@@ -0,0 +1,53 @@
+import { AxiosError } from 'axios';
+
+import {
+  IHttpTokenClient,
+  HttpCreateTokenRequest,
+  HttpCreateTokenResponse,
+  HttpVerifyTokenRequest,
+  HttpVerifyTokenResponse,
+} from '../token';
+
+import { mockPrepare } from './common';
+import { getUser, MockUserNotExistError, checkToken } from './user';
+
+export class MockHttpTokenClient implements IHttpTokenClient {
+  // TODO: Mock bad credentials error.
+  async create(req: HttpCreateTokenRequest): Promise<HttpCreateTokenResponse> {
+    await mockPrepare();
+    try {
+      const user = await getUser(req.username);
+      return {
+        user,
+        token: `token-${req.username}`,
+      };
+    } catch (e) {
+      if (e instanceof MockUserNotExistError) {
+        throw {
+          isAxiosError: true,
+          response: {
+            status: 400,
+          },
+        } as Partial<AxiosError>;
+      }
+      throw e;
+    }
+  }
+
+  async verify(req: HttpVerifyTokenRequest): Promise<HttpVerifyTokenResponse> {
+    await mockPrepare();
+    try {
+      const user = await getUser(checkToken(req.token));
+      return {
+        user,
+      };
+    } catch (e) {
+      throw {
+        isAxiosError: true,
+        response: {
+          status: 400,
+        },
+      } as Partial<AxiosError>;
+    }
+  }
+}
diff --git a/Timeline/ClientApp/src/app/http/mock/user.ts b/Timeline/ClientApp/src/app/http/mock/user.ts
new file mode 100644
index 00000000..d16302d4
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/mock/user.ts
@@ -0,0 +1,132 @@
+import axios from 'axios';
+
+import { BlobWithEtag, NotModified } from '../common';
+import {
+  IHttpUserClient,
+  HttpUser,
+  HttpUserNotExistError,
+  HttpUserPatchRequest,
+  HttpChangePasswordRequest,
+} from '../user';
+
+import { mockStorage, sha1, mockPrepare } from './common';
+
+import defaultAvatarUrl from './default-avatar.png';
+
+let _defaultAvatar: BlobWithEtag | undefined = undefined;
+
+async function getDefaultAvatar(): Promise<BlobWithEtag> {
+  if (_defaultAvatar == null) {
+    const blob = (
+      await axios.get<Blob>(defaultAvatarUrl, {
+        responseType: 'blob',
+      })
+    ).data;
+    const etag = await sha1(blob);
+    _defaultAvatar = {
+      data: blob,
+      etag,
+    };
+  }
+  return _defaultAvatar;
+}
+
+export class MockTokenError extends Error {
+  constructor() {
+    super('Token bad format.');
+  }
+}
+
+export class MockUserNotExistError extends Error {
+  constructor() {
+    super('Only two user "user" and "admin".');
+  }
+}
+
+export function checkUsername(username: string): void {
+  if (!['user', 'admin'].includes(username)) throw new MockUserNotExistError();
+}
+
+export function checkToken(token: string): string {
+  if (!token.startsWith('token-')) {
+    throw new MockTokenError();
+  }
+  return token.substr(6);
+}
+
+export async function getUser(
+  username: 'user' | 'admin' | string
+): Promise<HttpUser> {
+  checkUsername(username);
+  const savedNickname = await mockStorage.getItem<string>(
+    `user.${username}.nickname`
+  );
+  return {
+    username: username,
+    nickname:
+      savedNickname == null || savedNickname === '' ? username : savedNickname,
+    administrator: username === 'admin',
+  };
+}
+
+export class MockHttpUserClient implements IHttpUserClient {
+  async get(username: string): Promise<HttpUser> {
+    await mockPrepare();
+    return await getUser(username).catch((e) => {
+      if (e instanceof MockUserNotExistError) {
+        throw new HttpUserNotExistError();
+      } else {
+        throw e;
+      }
+    });
+  }
+
+  async patch(
+    username: string,
+    req: HttpUserPatchRequest,
+    _token: string
+  ): Promise<HttpUser> {
+    await mockPrepare();
+    if (req.nickname != null) {
+      await mockStorage.setItem(`user.${username}.nickname`, req.nickname);
+    }
+    return await getUser(username);
+  }
+
+  getAvatar(username: string): Promise<BlobWithEtag>;
+  async getAvatar(
+    username: string,
+    etag?: string
+  ): Promise<BlobWithEtag | NotModified> {
+    await mockPrepare();
+
+    const savedEtag = await mockStorage.getItem(`user.${username}.avatar.etag`);
+    if (savedEtag == null) {
+      return await getDefaultAvatar();
+    }
+
+    if (savedEtag === etag) {
+      return new NotModified();
+    }
+
+    return {
+      data: await mockStorage.getItem<Blob>(`user.${username}.avatar.data`),
+      etag: await mockStorage.getItem<string>(`user.${username}.avatar.etag`),
+    };
+  }
+
+  async putAvatar(username: string, data: Blob, _token: string): Promise<void> {
+    await mockPrepare();
+    const etag = await sha1(data);
+    await mockStorage.setItem<Blob>(`user.${username}.avatar.data`, data);
+    await mockStorage.setItem<string>(`user.${username}.avatar.etag`, etag);
+  }
+
+  async changePassword(
+    _req: HttpChangePasswordRequest,
+    _token: string
+  ): Promise<void> {
+    await mockPrepare();
+    throw new Error('Not Implemented.');
+  }
+}
diff --git a/Timeline/ClientApp/src/app/http/timeline.ts b/Timeline/ClientApp/src/app/http/timeline.ts
new file mode 100644
index 00000000..458ea6e6
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/timeline.ts
@@ -0,0 +1,476 @@
+import axios, { AxiosError } from 'axios';
+
+import { updateQueryString, applyQueryParameters } from '../utilities/url';
+import {
+  apiBaseUrl,
+  extractResponseData,
+  convertToNetworkError,
+  base64,
+  convertToIfStatusCodeIs,
+  convertToIfErrorCodeIs,
+  BlobWithEtag,
+  NotModified,
+  convertToBlobWithEtagOrNotModified,
+} from './common';
+import { HttpUser } from './user';
+
+export const kTimelineVisibilities = ['Public', 'Register', 'Private'] as const;
+
+export type TimelineVisibility = typeof kTimelineVisibilities[number];
+
+export interface HttpTimelineInfo {
+  uniqueId: string;
+  name: string;
+  description: string;
+  owner: HttpUser;
+  visibility: TimelineVisibility;
+  members: HttpUser[];
+}
+
+export interface HttpTimelineListQuery {
+  visibility?: TimelineVisibility;
+  relate?: string;
+  relateType?: 'own' | 'join';
+}
+
+export interface HttpTimelinePostRequest {
+  name: string;
+}
+
+export interface HttpTimelinePostTextContent {
+  type: 'text';
+  text: string;
+}
+
+export interface HttpTimelinePostImageContent {
+  type: 'image';
+}
+
+export type HttpTimelinePostContent =
+  | HttpTimelinePostTextContent
+  | HttpTimelinePostImageContent;
+
+export interface HttpTimelinePostInfo {
+  id: number;
+  content: HttpTimelinePostContent;
+  time: Date;
+  lastUpdated: Date;
+  author: HttpUser;
+  deleted: false;
+}
+
+export interface HttpTimelineDeletedPostInfo {
+  id: number;
+  time: Date;
+  lastUpdated: Date;
+  author: HttpUser;
+  deleted: true;
+}
+
+export type HttpTimelineGenericPostInfo =
+  | HttpTimelinePostInfo
+  | HttpTimelineDeletedPostInfo;
+
+export interface HttpTimelinePostPostRequestTextContent {
+  type: 'text';
+  text: string;
+}
+
+export interface HttpTimelinePostPostRequestImageContent {
+  type: 'image';
+  data: Blob;
+}
+
+export type HttpTimelinePostPostRequestContent =
+  | HttpTimelinePostPostRequestTextContent
+  | HttpTimelinePostPostRequestImageContent;
+
+export interface HttpTimelinePostPostRequest {
+  content: HttpTimelinePostPostRequestContent;
+  time?: Date;
+}
+
+export interface HttpTimelinePatchRequest {
+  visibility?: TimelineVisibility;
+  description?: string;
+}
+
+export class HttpTimelineNotExistError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export class HttpTimelinePostNotExistError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export class HttpTimelineNameConflictError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+//-------------------- begin: internal model --------------------
+
+interface RawTimelinePostTextContent {
+  type: 'text';
+  text: string;
+}
+
+interface RawTimelinePostImageContent {
+  type: 'image';
+  url: string;
+}
+
+type RawTimelinePostContent =
+  | RawTimelinePostTextContent
+  | RawTimelinePostImageContent;
+
+interface RawTimelinePostInfo {
+  id: number;
+  content: HttpTimelinePostContent;
+  time: string;
+  lastUpdated: string;
+  author: HttpUser;
+  deleted: false;
+}
+
+interface RawTimelineDeletedPostInfo {
+  id: number;
+  time: string;
+  lastUpdated: string;
+  author: HttpUser;
+  deleted: true;
+}
+
+type RawTimelineGenericPostInfo =
+  | RawTimelinePostInfo
+  | RawTimelineDeletedPostInfo;
+
+interface RawTimelinePostPostRequestTextContent {
+  type: 'text';
+  text: string;
+}
+
+interface RawTimelinePostPostRequestImageContent {
+  type: 'image';
+  data: string;
+}
+
+type RawTimelinePostPostRequestContent =
+  | RawTimelinePostPostRequestTextContent
+  | RawTimelinePostPostRequestImageContent;
+
+interface RawTimelinePostPostRequest {
+  content: RawTimelinePostPostRequestContent;
+  time?: string;
+}
+
+//-------------------- end: internal model --------------------
+
+function processRawTimelinePostInfo(
+  raw: RawTimelinePostInfo
+): HttpTimelinePostInfo;
+function processRawTimelinePostInfo(
+  raw: RawTimelineGenericPostInfo
+): HttpTimelineGenericPostInfo;
+function processRawTimelinePostInfo(
+  raw: RawTimelineGenericPostInfo
+): HttpTimelineGenericPostInfo {
+  return {
+    ...raw,
+    time: new Date(raw.time),
+    lastUpdated: new Date(raw.lastUpdated),
+  };
+}
+
+export interface IHttpTimelineClient {
+  listTimeline(query: HttpTimelineListQuery): Promise<HttpTimelineInfo[]>;
+  getTimeline(timelineName: string): Promise<HttpTimelineInfo>;
+  postTimeline(
+    req: HttpTimelinePostRequest,
+    token: string
+  ): Promise<HttpTimelineInfo>;
+  patchTimeline(
+    timelineName: string,
+    req: HttpTimelinePatchRequest,
+    token: string
+  ): Promise<HttpTimelineInfo>;
+  deleteTimeline(timelineName: string, token: string): Promise<void>;
+  memberPut(
+    timelineName: string,
+    username: string,
+    token: string
+  ): Promise<void>;
+  memberDelete(
+    timelineName: string,
+    username: string,
+    token: string
+  ): Promise<void>;
+  listPost(
+    timelineName: string,
+    token?: string
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted?: false;
+    }
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted: true;
+    }
+  ): Promise<HttpTimelineGenericPostInfo[]>;
+  getPostData(
+    timelineName: string,
+    postId: number,
+    token?: string
+  ): Promise<BlobWithEtag>;
+  getPostData(
+    timelineName: string,
+    postId: number,
+    token: string | undefined,
+    etag: string
+  ): Promise<BlobWithEtag | NotModified>;
+  postPost(
+    timelineName: string,
+    req: HttpTimelinePostPostRequest,
+    token: string
+  ): Promise<HttpTimelinePostInfo>;
+  deletePost(
+    timelineName: string,
+    postId: number,
+    token: string
+  ): Promise<void>;
+}
+
+export class HttpTimelineClient implements IHttpTimelineClient {
+  listTimeline(query: HttpTimelineListQuery): Promise<HttpTimelineInfo[]> {
+    return axios
+      .get<HttpTimelineInfo[]>(
+        applyQueryParameters(`${apiBaseUrl}/timelines`, query)
+      )
+      .then(extractResponseData)
+      .catch(convertToNetworkError);
+  }
+
+  getTimeline(timelineName: string): Promise<HttpTimelineInfo> {
+    return axios
+      .get<HttpTimelineInfo>(`${apiBaseUrl}/timelines/${timelineName}`)
+      .then(extractResponseData)
+      .catch(convertToIfStatusCodeIs(404, HttpTimelineNotExistError))
+      .catch(convertToNetworkError);
+  }
+
+  postTimeline(
+    req: HttpTimelinePostRequest,
+    token: string
+  ): Promise<HttpTimelineInfo> {
+    return axios
+      .post<HttpTimelineInfo>(`${apiBaseUrl}/timelines?token=${token}`, req)
+      .then(extractResponseData)
+      .catch(convertToIfErrorCodeIs(11040101, HttpTimelineNameConflictError))
+      .catch(convertToNetworkError);
+  }
+
+  patchTimeline(
+    timelineName: string,
+    req: HttpTimelinePatchRequest,
+    token: string
+  ): Promise<HttpTimelineInfo> {
+    return axios
+      .patch<HttpTimelineInfo>(
+        `${apiBaseUrl}/timelines/${timelineName}?token=${token}`,
+        req
+      )
+      .then(extractResponseData)
+      .catch(convertToNetworkError);
+  }
+
+  deleteTimeline(timelineName: string, token: string): Promise<void> {
+    return axios
+      .delete(`${apiBaseUrl}/timelines/${timelineName}?token=${token}`)
+      .catch(convertToNetworkError)
+      .then();
+  }
+
+  memberPut(
+    timelineName: string,
+    username: string,
+    token: string
+  ): Promise<void> {
+    return axios
+      .put(
+        `${apiBaseUrl}/timelines/${timelineName}/members/${username}?token=${token}`
+      )
+      .catch(convertToNetworkError)
+      .then();
+  }
+
+  memberDelete(
+    timelineName: string,
+    username: string,
+    token: string
+  ): Promise<void> {
+    return axios
+      .delete(
+        `${apiBaseUrl}/timelines/${timelineName}/members/${username}?token=${token}`
+      )
+      .catch(convertToNetworkError)
+      .then();
+  }
+
+  listPost(
+    timelineName: string,
+    token?: string
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted?: false;
+    }
+  ): Promise<HttpTimelinePostInfo[]>;
+  listPost(
+    timelineName: string,
+    token: string | undefined,
+    query: {
+      modifiedSince?: Date;
+      includeDeleted: true;
+    }
+  ): Promise<HttpTimelineGenericPostInfo[]>;
+  listPost(
+    timelineName: string,
+    token?: string,
+    query?: {
+      modifiedSince?: Date;
+      includeDeleted?: boolean;
+    }
+  ): Promise<HttpTimelineGenericPostInfo[]> {
+    let url = `${apiBaseUrl}/timelines/${timelineName}/posts`;
+    url = updateQueryString('token', token, url);
+    if (query != null) {
+      if (query.modifiedSince != null) {
+        url = updateQueryString(
+          'modifiedSince',
+          query.modifiedSince.toISOString(),
+          url
+        );
+      }
+      if (query.includeDeleted != null) {
+        url = updateQueryString(
+          'includeDeleted',
+          query.includeDeleted ? 'true' : 'false',
+          url
+        );
+      }
+    }
+
+    return axios
+      .get<RawTimelineGenericPostInfo[]>(url)
+      .then(extractResponseData)
+      .catch(convertToNetworkError)
+      .then((rawPosts) =>
+        rawPosts.map((raw) => processRawTimelinePostInfo(raw))
+      );
+  }
+
+  getPostData(
+    timelineName: string,
+    postId: number,
+    token: string
+  ): Promise<BlobWithEtag>;
+  getPostData(
+    timelineName: string,
+    postId: number,
+    token?: string,
+    etag?: string
+  ): Promise<BlobWithEtag | NotModified> {
+    const headers =
+      etag != null
+        ? {
+            'If-None-Match': etag,
+          }
+        : undefined;
+
+    let url = `${apiBaseUrl}/timelines/${timelineName}/posts/${postId}/data`;
+    url = updateQueryString('token', token, url);
+
+    return axios
+      .get(url, {
+        responseType: 'blob',
+        headers,
+      })
+      .then(convertToBlobWithEtagOrNotModified)
+      .catch(convertToIfStatusCodeIs(404, HttpTimelinePostNotExistError))
+      .catch(convertToNetworkError);
+  }
+
+  async postPost(
+    timelineName: string,
+    req: HttpTimelinePostPostRequest,
+    token: string
+  ): Promise<HttpTimelinePostInfo> {
+    let content: RawTimelinePostPostRequestContent;
+    if (req.content.type === 'image') {
+      const base64Data = await base64(req.content.data);
+      content = {
+        ...req.content,
+        data: base64Data,
+      } as RawTimelinePostPostRequestImageContent;
+    } else {
+      content = req.content;
+    }
+    const rawReq: RawTimelinePostPostRequest = {
+      content,
+    };
+    if (req.time != null) {
+      rawReq.time = req.time.toISOString();
+    }
+    return await axios
+      .post<RawTimelinePostInfo>(
+        `${apiBaseUrl}/timelines/${timelineName}/posts?token=${token}`,
+        rawReq
+      )
+      .then(extractResponseData)
+      .catch(convertToNetworkError)
+      .then((rawPost) => processRawTimelinePostInfo(rawPost));
+  }
+
+  deletePost(
+    timelineName: string,
+    postId: number,
+    token: string
+  ): Promise<void> {
+    return axios
+      .delete(
+        `${apiBaseUrl}/timelines/${timelineName}/posts/${postId}?token=${token}`
+      )
+      .catch(convertToNetworkError)
+      .then();
+  }
+}
+
+let client: IHttpTimelineClient = new HttpTimelineClient();
+
+export function getHttpTimelineClient(): IHttpTimelineClient {
+  return client;
+}
+
+export function setHttpTimelineClient(
+  newClient: IHttpTimelineClient
+): IHttpTimelineClient {
+  const old = client;
+  client = newClient;
+  return old;
+}
diff --git a/Timeline/ClientApp/src/app/http/token.ts b/Timeline/ClientApp/src/app/http/token.ts
new file mode 100644
index 00000000..26f7891f
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/token.ts
@@ -0,0 +1,72 @@
+import axios, { AxiosError } from 'axios';
+
+import {
+  apiBaseUrl,
+  convertToNetworkError,
+  convertToIfErrorCodeIs,
+  extractResponseData,
+} from './common';
+import { HttpUser } from './user';
+
+export interface HttpCreateTokenRequest {
+  username: string;
+  password: string;
+  expire: number;
+}
+
+export interface HttpCreateTokenResponse {
+  token: string;
+  user: HttpUser;
+}
+
+export interface HttpVerifyTokenRequest {
+  token: string;
+}
+
+export interface HttpVerifyTokenResponse {
+  user: HttpUser;
+}
+
+export class HttpCreateTokenBadCredentialError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export interface IHttpTokenClient {
+  create(req: HttpCreateTokenRequest): Promise<HttpCreateTokenResponse>;
+  verify(req: HttpVerifyTokenRequest): Promise<HttpVerifyTokenResponse>;
+}
+
+export class HttpTokenClient implements IHttpTokenClient {
+  create(req: HttpCreateTokenRequest): Promise<HttpCreateTokenResponse> {
+    return axios
+      .post<HttpCreateTokenResponse>(`${apiBaseUrl}/token/create`, req)
+      .then(extractResponseData)
+      .catch(
+        convertToIfErrorCodeIs(11010101, HttpCreateTokenBadCredentialError)
+      )
+      .catch(convertToNetworkError);
+  }
+
+  verify(req: HttpVerifyTokenRequest): Promise<HttpVerifyTokenResponse> {
+    return axios
+      .post<HttpVerifyTokenResponse>(`${apiBaseUrl}/token/verify`, req)
+      .then(extractResponseData)
+      .catch(convertToNetworkError);
+  }
+}
+
+let client: IHttpTokenClient = new HttpTokenClient();
+
+export function getHttpTokenClient(): IHttpTokenClient {
+  return client;
+}
+
+export function setHttpTokenClient(
+  newClient: IHttpTokenClient
+): IHttpTokenClient {
+  const old = client;
+  client = newClient;
+  return old;
+}
diff --git a/Timeline/ClientApp/src/app/http/user.ts b/Timeline/ClientApp/src/app/http/user.ts
new file mode 100644
index 00000000..345a5e8b
--- /dev/null
+++ b/Timeline/ClientApp/src/app/http/user.ts
@@ -0,0 +1,131 @@
+import axios, { AxiosError } from 'axios';
+
+import {
+  apiBaseUrl,
+  convertToNetworkError,
+  extractResponseData,
+  convertToIfStatusCodeIs,
+  convertToIfErrorCodeIs,
+  NotModified,
+  BlobWithEtag,
+  convertToBlobWithEtagOrNotModified,
+} from './common';
+
+export interface HttpUser {
+  username: string;
+  administrator: boolean;
+  nickname: string;
+}
+
+export interface HttpUserPatchRequest {
+  nickname?: string;
+}
+
+export interface HttpChangePasswordRequest {
+  oldPassword: string;
+  newPassword: string;
+}
+
+export class HttpUserNotExistError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export class HttpChangePasswordBadCredentialError extends Error {
+  constructor(public innerError?: AxiosError) {
+    super();
+  }
+}
+
+export interface IHttpUserClient {
+  get(username: string): Promise<HttpUser>;
+  patch(
+    username: string,
+    req: HttpUserPatchRequest,
+    token: string
+  ): Promise<HttpUser>;
+  getAvatar(username: string): Promise<BlobWithEtag>;
+  getAvatar(
+    username: string,
+    etag: string
+  ): Promise<BlobWithEtag | NotModified>;
+  putAvatar(username: string, data: Blob, token: string): Promise<void>;
+  changePassword(req: HttpChangePasswordRequest, token: string): Promise<void>;
+}
+
+export class HttpUserClient implements IHttpUserClient {
+  get(username: string): Promise<HttpUser> {
+    return axios
+      .get<HttpUser>(`${apiBaseUrl}/users/${username}`)
+      .then(extractResponseData)
+      .catch(convertToIfStatusCodeIs(404, HttpUserNotExistError))
+      .catch(convertToNetworkError);
+  }
+
+  patch(
+    username: string,
+    req: HttpUserPatchRequest,
+    token: string
+  ): Promise<HttpUser> {
+    return axios
+      .patch<HttpUser>(`${apiBaseUrl}/users/${username}?token=${token}`, req)
+      .then(extractResponseData)
+      .catch(convertToNetworkError);
+  }
+
+  getAvatar(username: string): Promise<BlobWithEtag>;
+  getAvatar(
+    username: string,
+    etag?: string
+  ): Promise<BlobWithEtag | NotModified> {
+    const headers =
+      etag != null
+        ? {
+            'If-None-Match': etag,
+          }
+        : undefined;
+
+    return axios
+      .get(`${apiBaseUrl}/users/${username}/avatar`, {
+        responseType: 'blob',
+        headers,
+      })
+      .then(convertToBlobWithEtagOrNotModified)
+      .catch(convertToIfStatusCodeIs(404, HttpUserNotExistError))
+      .catch(convertToNetworkError);
+  }
+
+  putAvatar(username: string, data: Blob, token: string): Promise<void> {
+    return axios
+      .put(`${apiBaseUrl}/users/${username}/avatar?token=${token}`, data, {
+        headers: {
+          'Content-Type': data.type,
+        },
+      })
+      .catch(convertToNetworkError)
+      .then();
+  }
+
+  changePassword(req: HttpChangePasswordRequest, token: string): Promise<void> {
+    return axios
+      .post(`${apiBaseUrl}/userop/changepassword?token=${token}`, req)
+      .catch(
+        convertToIfErrorCodeIs(11020201, HttpChangePasswordBadCredentialError)
+      )
+      .catch(convertToNetworkError)
+      .then();
+  }
+}
+
+let client: IHttpUserClient = new HttpUserClient();
+
+export function getHttpUserClient(): IHttpUserClient {
+  return client;
+}
+
+export function setHttpUserClient(newClient: IHttpUserClient): IHttpUserClient {
+  const old = client;
+  client = newClient;
+  return old;
+}