5 files changed, 630 insertions, 0 deletions
diff --git a/FrontEnd/src/views/center/CenterBoards.tsx b/FrontEnd/src/views/center/CenterBoards.tsx
new file mode 100644
index 00000000..431d1e9a
--- /dev/null
+++ b/FrontEnd/src/views/center/CenterBoards.tsx
@@ -0,0 +1,107 @@
+import React from "react";
+import { Row, Col } from "react-bootstrap";
+import { useTranslation } from "react-i18next";
+
+import { pushAlert } from "@/services/alert";
+import { useUserLoggedIn } from "@/services/user";
+
+import { getHttpTimelineClient } from "http/timeline";
+import { getHttpBookmarkClient } from "http/bookmark";
+import { getHttpHighlightClient } from "http/highlight";
+
+import TimelineBoard from "./TimelineBoard";
+
+const CenterBoards: React.FC = () => {
+  const { t } = useTranslation();
+
+  const user = useUserLoggedIn();
+
+  return (
+    <>
+      <Row className="justify-content-center">
+        <Col xs="12" md="6">
+          <Row>
+            <Col xs="12" className="my-2">
+              <TimelineBoard
+                title={t("home.bookmarkTimeline")}
+                load={() => getHttpBookmarkClient().list()}
+                editHandler={{
+                  onDelete: (timeline) => {
+                    return getHttpBookmarkClient()
+                      .delete(timeline)
+                      .catch((e) => {
+                        pushAlert({
+                          message: "home.message.deleteBookmarkFail",
+                          type: "danger",
+                        });
+                        throw e;
+                      });
+                  },
+                  onMove: (timeline, index, offset) => {
+                    return getHttpBookmarkClient()
+                      .move(
+                        { timeline, newPosition: index + offset + 1 } // +1 because backend contract: index starts at 1
+                      )
+                      .catch((e) => {
+                        pushAlert({
+                          message: "home.message.moveBookmarkFail",
+                          type: "danger",
+                        });
+                        throw e;
+                      });
+                  },
+                }}
+              />
+            </Col>
+            <Col xs="12" className="my-2">
+              <TimelineBoard
+                title={t("home.highlightTimeline")}
+                load={() => getHttpHighlightClient().list()}
+                editHandler={
+                  user.hasHighlightTimelineAdministrationPermission
+                    ? {
+                        onDelete: (timeline) => {
+                          return getHttpHighlightClient()
+                            .delete(timeline)
+                            .catch((e) => {
+                              pushAlert({
+                                message: "home.message.deleteHighlightFail",
+                                type: "danger",
+                              });
+                              throw e;
+                            });
+                        },
+                        onMove: (timeline, index, offset) => {
+                          return getHttpHighlightClient()
+                            .move(
+                              { timeline, newPosition: index + offset + 1 } // +1 because backend contract: index starts at 1
+                            )
+                            .catch((e) => {
+                              pushAlert({
+                                message: "home.message.moveHighlightFail",
+                                type: "danger",
+                              });
+                              throw e;
+                            });
+                        },
+                      }
+                    : undefined
+                }
+              />
+            </Col>
+          </Row>
+        </Col>
+        <Col xs="12" md="6" className="my-2">
+          <TimelineBoard
+            title={t("home.relatedTimeline")}
+            load={() =>
+              getHttpTimelineClient().listTimeline({ relate: user.username })
+            }
+          />
+        </Col>
+      </Row>
+    </>
+  );
+};
+
+export default CenterBoards;
diff --git a/FrontEnd/src/views/center/TimelineBoard.tsx b/FrontEnd/src/views/center/TimelineBoard.tsx
new file mode 100644
index 00000000..bb80266b
--- /dev/null
+++ b/FrontEnd/src/views/center/TimelineBoard.tsx
@@ -0,0 +1,370 @@
+import React from "react";
+import classnames from "classnames";
+import { Link } from "react-router-dom";
+import { useTranslation } from "react-i18next";
+import { Spinner } from "react-bootstrap";
+
+import { HttpTimelineInfo } from "http/timeline";
+
+import TimelineLogo from "../common/TimelineLogo";
+import UserTimelineLogo from "../common/UserTimelineLogo";
+import LoadFailReload from "../common/LoadFailReload";
+
+interface TimelineBoardItemProps {
+  timeline: HttpTimelineInfo;
+  // In height.
+  offset?: number;
+  // In px.
+  arbitraryOffset?: number;
+  // If not null, will disable navigation on click.
+  actions?: {
+    onDelete: () => void;
+    onMove: {
+      start: (e: React.PointerEvent) => void;
+      moving: (e: React.PointerEvent) => void;
+      end: (e: React.PointerEvent) => void;
+    };
+  };
+}
+
+const TimelineBoardItem: React.FC<TimelineBoardItemProps> = ({
+  timeline,
+  arbitraryOffset,
+  offset,
+  actions,
+}) => {
+  const { name, title } = timeline;
+  const isPersonal = name.startsWith("@");
+  const url = isPersonal
+    ? `/users/${timeline.owner.username}`
+    : `/timelines/${name}`;
+
+  const content = (
+    <>
+      {isPersonal ? (
+        <UserTimelineLogo className="icon" />
+      ) : (
+        <TimelineLogo className="icon" />
+      )}
+      <span className="title">{title}</span>
+      <small className="ms-2 text-secondary">{name}</small>
+      <span className="flex-grow-1"></span>
+      {actions != null ? (
+        <div className="right">
+          <i
+            className="bi-trash icon-button text-danger px-2"
+            onClick={actions.onDelete}
+          />
+          <i
+            className="bi-grip-vertical icon-button text-gray px-2 touch-action-none"
+            onPointerDown={(e) => {
+              e.currentTarget.setPointerCapture(e.pointerId);
+              actions.onMove.start(e);
+            }}
+            onPointerUp={(e) => {
+              actions.onMove.end(e);
+              try {
+                e.currentTarget.releasePointerCapture(e.pointerId);
+              } catch (_) {
+                void null;
+              }
+            }}
+            onPointerMove={actions.onMove.moving}
+          />
+        </div>
+      ) : null}
+    </>
+  );
+
+  const offsetStyle: React.CSSProperties = {
+    transform:
+      arbitraryOffset != null
+        ? `translate(0,${arbitraryOffset}px)`
+        : offset != null
+        ? `translate(0,${offset * 100}%)`
+        : undefined,
+    transition: offset != null ? "transform 0.5s" : undefined,
+    zIndex: arbitraryOffset != null ? 1 : undefined,
+  };
+
+  return actions == null ? (
+    <Link to={url} className="timeline-board-item">
+      {content}
+    </Link>
+  ) : (
+    <div style={offsetStyle} className="timeline-board-item">
+      {content}
+    </div>
+  );
+};
+
+interface TimelineBoardItemContainerProps {
+  timelines: HttpTimelineInfo[];
+  editHandler?: {
+    // offset may exceed index range plusing index.
+    onMove: (timeline: string, index: number, offset: number) => void;
+    onDelete: (timeline: string) => void;
+  };
+}
+
+const TimelineBoardItemContainer: React.FC<TimelineBoardItemContainerProps> = ({
+  timelines,
+  editHandler,
+}) => {
+  const [moveState, setMoveState] = React.useState<null | {
+    index: number;
+    offset: number;
+    startPointY: number;
+  }>(null);
+
+  return (
+    <>
+      {timelines.map((timeline, index) => {
+        const height = 48;
+
+        let offset: number | undefined = undefined;
+        let arbitraryOffset: number | undefined = undefined;
+        if (moveState != null) {
+          if (index === moveState.index) {
+            arbitraryOffset = moveState.offset;
+          } else {
+            if (moveState.offset >= 0) {
+              const offsetCount = Math.round(moveState.offset / height);
+              if (
+                index > moveState.index &&
+                index <= moveState.index + offsetCount
+              ) {
+                offset = -1;
+              } else {
+                offset = 0;
+              }
+            } else {
+              const offsetCount = Math.round(-moveState.offset / height);
+              if (
+                index < moveState.index &&
+                index >= moveState.index - offsetCount
+              ) {
+                offset = 1;
+              } else {
+                offset = 0;
+              }
+            }
+          }
+        }
+
+        return (
+          <TimelineBoardItem
+            key={timeline.name}
+            timeline={timeline}
+            offset={offset}
+            arbitraryOffset={arbitraryOffset}
+            actions={
+              editHandler != null
+                ? {
+                    onDelete: () => {
+                      editHandler.onDelete(timeline.name);
+                    },
+                    onMove: {
+                      start: (e) => {
+                        if (moveState != null) return;
+                        setMoveState({
+                          index,
+                          offset: 0,
+                          startPointY: e.clientY,
+                        });
+                      },
+                      moving: (e) => {
+                        if (moveState == null) return;
+                        setMoveState({
+                          index,
+                          offset: e.clientY - moveState.startPointY,
+                          startPointY: moveState.startPointY,
+                        });
+                      },
+                      end: () => {
+                        if (moveState != null) {
+                          const offsetCount = Math.round(
+                            moveState.offset / height
+                          );
+                          editHandler.onMove(
+                            timeline.name,
+                            moveState.index,
+                            offsetCount
+                          );
+                        }
+                        setMoveState(null);
+                      },
+                    },
+                  }
+                : undefined
+            }
+          />
+        );
+      })}
+    </>
+  );
+};
+
+interface TimelineBoardUIProps {
+  title?: string;
+  timelines: HttpTimelineInfo[] | "offline" | "loading";
+  onReload: () => void;
+  className?: string;
+  editHandler?: {
+    onMove: (timeline: string, index: number, offset: number) => void;
+    onDelete: (timeline: string) => void;
+  };
+}
+
+const TimelineBoardUI: React.FC<TimelineBoardUIProps> = (props) => {
+  const { title, timelines, className, editHandler } = props;
+
+  const { t } = useTranslation();
+
+  const editable = editHandler != null;
+
+  const [editing, setEditing] = React.useState<boolean>(false);
+
+  return (
+    <div className={classnames("timeline-board", className)}>
+      <div className="timeline-board-header">
+        {title != null && <h3>{title}</h3>}
+        {editable &&
+          (editing ? (
+            <div
+              className="flat-button text-primary"
+              onClick={() => {
+                setEditing(false);
+              }}
+            >
+              {t("done")}
+            </div>
+          ) : (
+            <div
+              className="flat-button text-primary"
+              onClick={() => {
+                setEditing(true);
+              }}
+            >
+              {t("edit")}
+            </div>
+          ))}
+      </div>
+      {(() => {
+        if (timelines === "loading") {
+          return (
+            <div className="d-flex flex-grow-1 justify-content-center align-items-center">
+              <Spinner variant="primary" animation="border" />
+            </div>
+          );
+        } else if (timelines === "offline") {
+          return (
+            <div className="d-flex flex-grow-1 justify-content-center align-items-center">
+              <LoadFailReload onReload={props.onReload} />
+            </div>
+          );
+        } else {
+          return (
+            <TimelineBoardItemContainer
+              timelines={timelines}
+              editHandler={
+                editHandler && editing
+                  ? {
+                      onDelete: editHandler.onDelete,
+                      onMove: (timeline, index, offset) => {
+                        if (index + offset >= timelines.length) {
+                          offset = timelines.length - index - 1;
+                        } else if (index + offset < 0) {
+                          offset = -index;
+                        }
+                        editHandler.onMove(timeline, index, offset);
+                      },
+                    }
+                  : undefined
+              }
+            />
+          );
+        }
+      })()}
+    </div>
+  );
+};
+
+export interface TimelineBoardProps {
+  title?: string;
+  className?: string;
+  load: () => Promise<HttpTimelineInfo[]>;
+  editHandler?: {
+    onMove: (timeline: string, index: number, offset: number) => Promise<void>;
+    onDelete: (timeline: string) => Promise<void>;
+  };
+}
+
+const TimelineBoard: React.FC<TimelineBoardProps> = ({
+  className,
+  title,
+  load,
+  editHandler,
+}) => {
+  const [timelines, setTimelines] = React.useState<
+    HttpTimelineInfo[] | "offline" | "loading"
+  >("loading");
+
+  React.useEffect(() => {
+    let subscribe = true;
+    if (timelines === "loading") {
+      void load().then(
+        (timelines) => {
+          if (subscribe) {
+            setTimelines(timelines);
+          }
+        },
+        () => {
+          setTimelines("offline");
+        }
+      );
+    }
+    return () => {
+      subscribe = false;
+    };
+  }, [load, timelines]);
+
+  return (
+    <TimelineBoardUI
+      title={title}
+      className={className}
+      timelines={timelines}
+      onReload={() => {
+        setTimelines("loading");
+      }}
+      editHandler={
+        typeof timelines === "object" && editHandler != null
+          ? {
+              onMove: (timeline, index, offset) => {
+                const newTimelines = timelines.slice();
+                const [t] = newTimelines.splice(index, 1);
+                newTimelines.splice(index + offset, 0, t);
+                setTimelines(newTimelines);
+                editHandler.onMove(timeline, index, offset).then(null, () => {
+                  setTimelines(timelines);
+                });
+              },
+              onDelete: (timeline) => {
+                const newTimelines = timelines.slice();
+                newTimelines.splice(
+                  timelines.findIndex((t) => t.name === timeline),
+                  1
+                );
+                setTimelines(newTimelines);
+                editHandler.onDelete(timeline).then(null, () => {
+                  setTimelines(timelines);
+                });
+              },
+            }
+          : undefined
+      }
+    />
+  );
+};
+
+export default TimelineBoard;
diff --git a/FrontEnd/src/views/center/TimelineCreateDialog.tsx b/FrontEnd/src/views/center/TimelineCreateDialog.tsx
new file mode 100644
index 00000000..a2437ae5
--- /dev/null
+++ b/FrontEnd/src/views/center/TimelineCreateDialog.tsx
@@ -0,0 +1,53 @@
+import React from "react";
+import { useHistory } from "react-router";
+
+import { validateTimelineName } from "@/services/timeline";
+import OperationDialog from "../common/OperationDialog";
+import { getHttpTimelineClient, HttpTimelineInfo } from "http/timeline";
+
+interface TimelineCreateDialogProps {
+  open: boolean;
+  close: () => void;
+}
+
+const TimelineCreateDialog: React.FC<TimelineCreateDialogProps> = (props) => {
+  const history = useHistory();
+
+  return (
+    <OperationDialog
+      open={props.open}
+      close={props.close}
+      themeColor="success"
+      title="home.createDialog.title"
+      inputScheme={
+        [
+          {
+            type: "text",
+            label: "home.createDialog.name",
+            helperText: "home.createDialog.nameFormat",
+          },
+        ] as const
+      }
+      inputValidator={([name]) => {
+        if (name.length === 0) {
+          return { 0: "home.createDialog.noEmpty" };
+        } else if (name.length > 26) {
+          return { 0: "home.createDialog.tooLong" };
+        } else if (!validateTimelineName(name)) {
+          return { 0: "home.createDialog.badFormat" };
+        } else {
+          return null;
+        }
+      }}
+      onProcess={([name]): Promise<HttpTimelineInfo> =>
+        getHttpTimelineClient().postTimeline({ name })
+      }
+      onSuccessAndClose={(timeline: HttpTimelineInfo) => {
+        history.push(`timelines/${timeline.name}`);
+      }}
+      failurePrompt={(e) => `${e as string}`}
+    />
+  );
+};
+
+export default TimelineCreateDialog;
diff --git a/FrontEnd/src/views/center/center.sass b/FrontEnd/src/views/center/center.sass
new file mode 100644
index 00000000..c0dfb9c0
--- /dev/null
+++ b/FrontEnd/src/views/center/center.sass
@@ -0,0 +1,36 @@
+.timeline-board
+  @extend .cru-card
+  @extend .d-flex
+  @extend .flex-column
+  @extend .py-3
+  min-height: 200px
+  height: 100%
+  position: relative
+
+.timeline-board-header
+  @extend .px-3
+  display: flex
+  align-items: center
+  justify-content: space-between
+
+.timeline-board-item
+  font-size: 1.1em
+  @extend .px-3
+  height: 48px
+  transition: background 0.3s
+  display: flex
+  align-items: center
+  .icon
+    height: 1.3em
+    color: black
+    @extend .me-2
+  &:hover
+    background: $gray-300
+  .right
+    display: flex
+    align-items: center
+    flex-shrink: 0
+  .title
+    white-space: nowrap
+    overflow: hidden
+    text-overflow: ellipsis
diff --git a/FrontEnd/src/views/center/index.tsx b/FrontEnd/src/views/center/index.tsx
new file mode 100644
index 00000000..0a2abb2c
--- /dev/null
+++ b/FrontEnd/src/views/center/index.tsx
@@ -0,0 +1,64 @@
+import React from "react";
+import { useHistory } from "react-router";
+import { useTranslation } from "react-i18next";
+import { Row, Container, Button, Col } from "react-bootstrap";
+
+import { useUserLoggedIn } from "@/services/user";
+
+import SearchInput from "../common/SearchInput";
+import CenterBoards from "./CenterBoards";
+import TimelineCreateDialog from "./TimelineCreateDialog";
+
+const HomePage: React.FC = () => {
+  const history = useHistory();
+
+  const { t } = useTranslation();
+
+  const user = useUserLoggedIn();
+
+  const [navText, setNavText] = React.useState<string>("");
+
+  const [dialog, setDialog] = React.useState<"create" | null>(null);
+
+  return (
+    <>
+      <Container>
+        <Row className="my-3 justify-content-center">
+          <Col xs={12} sm={8} lg={6}>
+            <SearchInput
+              className="justify-content-center"
+              value={navText}
+              onChange={setNavText}
+              onButtonClick={() => {
+                history.push(`search?q=${navText}`);
+              }}
+              additionalButton={
+                user != null && (
+                  <Button
+                    variant="outline-success"
+                    onClick={() => {
+                      setDialog("create");
+                    }}
+                  >
+                    {t("home.createButton")}
+                  </Button>
+                )
+              }
+            />
+          </Col>
+        </Row>
+        <CenterBoards />
+      </Container>
+      {dialog === "create" && (
+        <TimelineCreateDialog
+          open
+          close={() => {
+            setDialog(null);
+          }}
+        />
+      )}
+    </>
+  );
+};
+
+export default HomePage;