littr

litter-go (littr)

litter again, now in Go as a PWA --- a microblogging service without notifications (by default off) and pesky messaging, just a raw mind flow

read more (a blog post)

repo vademecum

api

• swagger documentation

cmd

• main app entrypoints for build

cmd/littr/http_server.go

• init app file for the app's backend side with REST API service

cmd/littr/wasm_client.go

• lightened version of HTTP server, includes basic app router, lacks REST API service

configs

• configuration files
• nginx proxy full configuration

.data/

• sample data used to flush existing container data by make flush

deployments

• docker deployment files

.env + .env.example

• environmental contants and vars for the app to run smoothly (in Docker via Makefile)

pkg

• app libs

pkg/backend

• REST API backend service
• service is used by WASM client for fetching of app data

pkg/frontend

• frontend pages
• go-app framework usecase

pkg/models/

• various shared model declarations

web

• static web files, logos, web manifest

how it should work

• users must register (/register) or existed users login (/login)
• users can navigate to the flow (/flow) and read other's mind flows
• users can change their passphrase or the about description in settings (/settings)
• posts can be written and sent (/post) by any logged-in user
• users can logout (/logout)

features

• switchable end-to-end encryption (JSON/octet-stream REST API and LocalStorage for service worker)
• in-memory runtime cache(s)
• data persistence on container restart (on SIGINT)
• flow posts filtering using the FlowList --- simply choose who to follow
• can run offline
• shade function to block other accounts from following and reading their posts

REST API service

• API documentation is stored in api/ root directory
• the service is reachable via (/api/v1) endpoint
• swagger live docs

how to run (docker)

# create env file copy and modify it
cp .env.example .env
vi .env

# build docker image (Docker engine mandatory)
make build

# run docker-compose stack, start up the stack
make run

# Makefile helper print
make info

# flush app data --- copy empty files from 'data/' to the container
make flush kill run

development

litter-backend container can be run locally on any dev machine (using Docker engine or using the required tag-locked Go runtime)

make dev

http://localhost:8093/flow

investigating the runtime data

make sh

ls -laR data/

data/:
total 44
drwxr-xr-x    1 littr    littr           96 Nov 14 22:21 .
drwxr-sr-x    1 littr    littr           24 Dec 17 20:58 ..
-rw-r--r--    1 littr    littr         2562 Dec 17 22:02 polls.json
-rw-r--r--    1 littr    littr        24309 Dec 17 22:02 posts.json
-rw-r-----    1 littr    littr         1154 Dec 17 22:02 subscriptions.json
-rw-r--r--    1 littr    littr        11923 Dec 17 22:02 users.json

In the listing above we can see freshly dumped data from littr runtime. We can fetch it outside the container using make fetch_run_data.

make fetch_running_dump

 Copying dumped data from the container...

Successfully copied 13.8kB to /home/user/litter-go/run_data/
Successfully copied 4.61kB to /home/user/litter-go/run_data/
Successfully copied 26.1kB to /home/user/litter-go/run_data/
Successfully copied 3.07kB to /home/user/litter-go/run_data/

nice-to-have(s)

• account deletion (settings page)
• add timestamps on server, render them on client side
• automatic links for known TLDs
• autosubmit on password manager autofill (when username and password get filled quite quickly)
• break lines on \n in posts
• check for double posting same content
• custom colour theme per user
• dismiss any modal by clicking anywhere on the screen
• fix update indicator checker (runs only on once after reload) (autoupdate)
• implement customizable navbar items order
• show offline mode notification
• show user's details on the top of /flow/ page
• swagger docs
• test if dump dir writable (on init) (chown included in Dockerfile)

roadmap to v1.0.0

• add periodic subscription checker (older than a week will be deleted on no activity)

roadmap to v0.36

• implement searching for flow using hashtags
• write integration and e2e tests

roadmap to v0.35

• fix the code smells as scanned by sonar-scanner
• resolve tikets in github and redmine (priv)

roadmap to v0.34

• fix the flow-users glitch (new users' posts not seen in flow on other devices)
• implement private account logic (wip)
• allow picture-only posting

roadmap to v0.33

• BE deep code refactoring (wip)
• write and fix swagger docs

roadmap to v0.32

• implement mentions with notification to such user

roadmap to v0.31

• implement subscribtion list item deletion
• improve the UI/UX (review issues related to UI on Github) (wip)

roadmap to v0.30

• implement Ctrl+Enter to submit posts like YouTube
• unify the UI elements' border radius and their styling

roadmap to v0.29

• add timestamp to a subscription
• list subscribed devides on settings page

roadmap to v0.28

• enhance the notification service

roadmap to v0.27

• implement mailing (verification mails) on backend
• implement forgotten password recovery (wip)

roadmap to v0.26

• implement combined picture-with-text (PwT) posting (wip)

roadmap to v0.25

• implement simple loading/broadcasting of new posts (wip)
• fix single-post and user flow subpages on flow (wip)

roadmap to v0.24

• add modal for post deletion confirmation
• implement JWT for auth (wip)
• preprocess and paginate posts on backend (wip)

roadmap to v0.23

• reintroduce /api/stats route to simplify the stats page
• use a router (Gorilla Mux, Go-Chi)

roadmap to v0.22

• fix flow reorganize glitch (single page, after post deletion etc) (wip) (fixed in v0.30.29)
• send frontend's tagged version to backend (improve user debugging)

roadmap to v0.21

• implement simple notification service (wip)
• implement subscriptions (SubscriptionCache)
• show user's profile on top of the flow single page view

roadmap to v0.20

• fix thumbnail multiple-loading on scroll
• implement image uploading directly from browser

roadmap to v0.19

• add avatar preview to settings page
• fix local JS and CSS deps (hotfix via remote CDN)
• fix NaN% when loading
• implement custom JSON log wrapper (goroutine?)
• implement <details> tag for posts longer than `MaxPostLength)
• implement shadow function (acc blocking)
• implement some user's stats on users page
• show selected user's posts only --- button/link on users page

roadmap to v0.18

• add links to a single flow post
• show replies (+history) in the single post view

roadmap to v0.17

• implement user deletion (settings page)

roadmap to v0.16

• add switch for light/dark mode toggle
• profile icons on the flow page (with link to user info modal???)
• fix register date (migration)

roadmap to v0.15

• implement inf. scroll to stats (complex)???
• replies to any post in flow
• add simple ToS (terms of service)

roadmap to v0.14

• ensure infinite scroll works properly with flow filtering
• disable update button, autoreload on update instead
• include infinite scroll to polls and users

roadmap to v0.13

• implement infinite scroll (for flow only this time)
• implement pagination for flow (on backend prolly)

roadmap to v0.12

• implement user's profile (real name, home page, followers) as modal
• mark selected fields with data labels (data-author etc)
• notice user's activity (User.LastActiveTime)

roadmap to v0.11

• upgrade toasts to snackbars (beercss v3.3.5)
• disable buttons on action to prevent multiple action fires
• implement system stats, add flowers (follower) count
• add LitterJS external lib

roadmap to v0.10

• implement search bar (stats and users pages only)

roadmap to v0.9

• implement polls (create poll, voting)
• healthcheck as a periodic cache dumper

roadmap to v0.8

• implement stats
• ensure system user unregisterable by the app logic (not hardcoded)
  • define data/users.json system users (regular users, but simply taken already by the init time)
• implement picture posting (via URL)

readmap to v0.7

• implement functional flowList editting via UI
• implement functional filtering using flowList
• fix dynamic stargazing and post deletion

roadmap to v0.6

• fix settings (broken pwd and about text change)
• fix register when given user exists already

roadmap to v0.4/v0.5

• stabilize database (implement in-memory caches)
• fix layout (unwanted less-data page scrolling
• dump data on container restart/SIGINT

roadmap to v0.3

• use local JSON storage
• implement backend.authUser
• functional user login/logout
• functional settings page
• functional add/remove flow user

roadmap to v0.2

• Go backend (BE) --- server-side
• connect frontend (FE) to BE
• application logic --- functional pages' inputs, buttons, lists (flow, users)