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add chat history instructions to README (#56)

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Efim Poberezkin 2021-02-26 18:53:50 +04:00
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README.md
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@ -43,7 +43,7 @@ $ DOCKER_BUILDKIT=1 docker build --output ~/.local/bin .
$ dog-food
```
> **NOTE:** when running chat client executable built with the latter approach, if you encounter ``version `GLIBC_2.28' not found`` error, rebuild it with `haskell:8.8.4-stretch` base image instead (you'd have to change it in your local [Dockerfile](Dockerfile)).
> **NOTE:** When running chat client executable built with the latter approach, if you encounter ``version `GLIBC_2.28' not found`` error, rebuild it with `haskell:8.8.4-stretch` base image instead (you'd have to change it in your local [Dockerfile](Dockerfile)).
`dog-food` (as in "eating your own dog food" - it is an early prototype) starts chat client with default parameters. By default, SQLite database file is created in the working directory (`smp-chat.db`), and the default SMP server is `smp.simplex.im:5223`.
@ -98,6 +98,22 @@ Now Alice's invitations would be generated with her name in it for others' conve
Use `/help` in chat to see the list of available commands and their explanation.
### Accessing chat history
You can access your chat history by opening a connection to your SQLite database file and querying `messages` table, for example:
```sql
select * from messages
where conn_alias = cast('alice' as blob)
order by internal_id desc;
select * from messages
where conn_alias = cast('alice' as blob)
and body like '%cats%';
```
> **NOTE:** Beware that SQLite foreign key constraints are disabled by default, and must be **[enabled separately for each database connection](https://sqlite.org/foreignkeys.html#fk_enable)**. The latter can be achieved by running `PRAGMA foreign_keys = ON;` command on an open database connection. By running data altering queries without enabling foreign keys prior to that, you may risk putting your database in an inconsistent state.
## 🚧 [further README not up to date] SMP server demo 🏗
This is a demo implementation of SMP ([simplex messaging protocol](https://github.com/simplex-chat/protocol/blob/master/simplex-messaging.md)) server.