readme and license

.gitignore

@@ -1,2 +1,3 @@
 /target
 .vscode
+*.env

Cargo.lock

@@ -215,12 +215,32 @@ dependencies = [
  "alloc-no-stdlib",
 ]
 
+[[package]]
+name = "autocfg"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c08606f8c3cbf4ce6ec8e28fb0014a2c086708fe954eaa885384a6165172e7e8"
+
 [[package]]
 name = "base64"
 version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
+[[package]]
+name = "bigdecimal"
+version = "0.4.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d6867f1565b3aad85681f1015055b087fcfd840d6aeee6eee7f2da317603695"
+dependencies = [
+ "autocfg",
+ "libm",
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+ "serde",
+]
+
 [[package]]
 name = "bitflags"
 version = "2.10.0"
@@ -257,6 +277,12 @@ dependencies = [
  "alloc-stdlib",
 ]
 
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
 [[package]]
 name = "bytes"
 version = "1.11.0"
@@ -295,6 +321,10 @@ name = "colota_backend"
 version = "0.1.0"
 dependencies = [
  "actix-web",
+ "bigdecimal",
+ "diesel",
+ "dotenvy",
+ "schema",
  "serde",
  "serde_json",
 ]
@@ -347,6 +377,41 @@ dependencies = [
  "typenum",
 ]
 
+[[package]]
+name = "darling"
+version = "0.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9cdf337090841a411e2a7f3deb9187445851f91b309c0c0a29e05f74a00a48c0"
+dependencies = [
+ "darling_core",
+ "darling_macro",
+]
+
+[[package]]
+name = "darling_core"
+version = "0.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1247195ecd7e3c85f83c8d2a366e4210d588e802133e1e355180a9870b517ea4"
+dependencies = [
+ "fnv",
+ "ident_case",
+ "proc-macro2",
+ "quote",
+ "strsim",
+ "syn",
+]
+
+[[package]]
+name = "darling_macro"
+version = "0.21.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d38308df82d1080de0afee5d069fa14b0326a88c14f15c5ccda35b4a6c414c81"
+dependencies = [
+ "darling_core",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "deranged"
 version = "0.5.5"
@@ -379,6 +444,48 @@ dependencies = [
  "unicode-xid",
 ]
 
+[[package]]
+name = "diesel"
+version = "2.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b6c2fc184a6fb6ebcf5f9a5e3bbfa84d8fd268cdfcce4ed508979a6259494d"
+dependencies = [
+ "bigdecimal",
+ "bitflags",
+ "byteorder",
+ "diesel_derives",
+ "downcast-rs",
+ "itoa",
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+ "pq-sys",
+ "r2d2",
+ "serde_json",
+]
+
+[[package]]
+name = "diesel_derives"
+version = "2.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47618bf0fac06bb670c036e48404c26a865e6a71af4114dfd97dfe89936e404e"
+dependencies = [
+ "diesel_table_macro_syntax",
+ "dsl_auto_type",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "diesel_table_macro_syntax"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe2444076b48641147115697648dc743c2c00b61adade0f01ce67133c7babe8c"
+dependencies = [
+ "syn",
+]
+
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -400,6 +507,38 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "dotenvy"
+version = "0.15.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1aaf95b3e5c8f23aa320147307562d361db0ae0d51242340f558153b4eb2439b"
+
+[[package]]
+name = "downcast-rs"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "117240f60069e65410b3ae1bb213295bd828f707b5bec6596a1afc8793ce0cbc"
+
+[[package]]
+name = "dsl_auto_type"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd122633e4bef06db27737f21d3738fb89c8f6d5360d6d9d7635dda142a7757e"
+dependencies = [
+ "darling",
+ "either",
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "either"
+version = "1.15.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"
+
 [[package]]
 name = "encoding_rs"
 version = "0.8.35"
@@ -539,6 +678,12 @@ version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "http"
 version = "0.2.12"
@@ -643,6 +788,12 @@ dependencies = [
  "zerovec",
 ]
 
+[[package]]
+name = "ident_case"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
+
 [[package]]
 name = "idna"
 version = "1.1.0"
@@ -708,6 +859,12 @@ version = "0.2.180"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
 
+[[package]]
+name = "libm"
+version = "0.2.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
+
 [[package]]
 name = "litemap"
 version = "0.8.1"
@@ -780,12 +937,40 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "num-bigint"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
+dependencies = [
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf97ec579c3c42f953ef76dbf8d55ac91fb219dde70e49aa4a6b7d74e9919050"
 
+[[package]]
+name = "num-integer"
+version = "0.1.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7969661fd2958a5cb096e56c8e1ad0444ac2bbcd0061bd28660485a44879858f"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "num-traits"
+version = "0.2.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
+dependencies = [
+ "autocfg",
+]
+
 [[package]]
 name = "once_cell"
 version = "1.21.3"
@@ -815,6 +1000,12 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -863,6 +1054,17 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "pq-sys"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "574ddd6a267294433f140b02a726b0640c43cf7c6f717084684aaa3b285aba61"
+dependencies = [
+ "libc",
+ "pkg-config",
+ "vcpkg",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.106"
@@ -887,6 +1089,17 @@ version = "5.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
 
+[[package]]
+name = "r2d2"
+version = "0.8.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "51de85fb3fb6524929c8a2eb85e6b6d363de4e8c48f9e2c2eac4944abc181c93"
+dependencies = [
+ "log",
+ "parking_lot",
+ "scheduled-thread-pool",
+]
+
 [[package]]
 name = "rand"
 version = "0.9.2"
@@ -975,6 +1188,39 @@ version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a50f4cf475b65d88e057964e0e9bb1f0aa9bbb2036dc65c64596b42932536984"
 
+[[package]]
+name = "scheduled-thread-pool"
+version = "0.2.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3cbc66816425a074528352f5789333ecff06ca41b36b0b0efdfbb29edc391a19"
+dependencies = [
+ "parking_lot",
+]
+
+[[package]]
+name = "schema"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96422023a2fbf8c618a005a24bcbe01d1f3159e5ea7c8881120fa25227e39a2c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "schema-derive",
+ "syn",
+]
+
+[[package]]
+name = "schema-derive"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "325e57fb235cb8b19d922a8d28c5d22d705b8fe41a27cc6c189b851e0d1cba6f"
+dependencies = [
+ "paste",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -1113,6 +1359,12 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce2be8dc25455e1f91df71bfa12ad37d7af1092ae736f3a6cd0e37bc7810596"
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "syn"
 version = "2.0.114"
@@ -1279,6 +1531,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
 
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
 [[package]]
 name = "version_check"
 version = "0.9.5"

Cargo.toml

@@ -7,3 +7,7 @@ edition = "2024"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 actix-web = "4.x.x"
+bigdecimal = {version = "0.4.10", features = ["serde"] }
+diesel = { version = "2.3.6", default-features = false, features = ["postgres", "serde_json", "numeric", "r2d2"] }
+dotenvy = "0.15.7"
+schema = "0.1.0"

License

@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
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+License is intended to guarantee your freedom to share and change free
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+General Public License applies to most of the Free Software
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+  When we speak of free software, we are referring to freedom, not
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+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

diesel.toml

@@ -0,0 +1,9 @@
+# For documentation on how to configure this file,
+# see https://diesel.rs/guides/configuring-diesel-cli
+
+[print_schema]
+file = "src/schema.rs"
+custom_type_derives = ["diesel::query_builder::QueryId", "Clone"]
+
+[migrations_directory]
+dir = "migrations"

migrations/00000000000000_diesel_initial_setup/down.sql

@@ -0,0 +1,6 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+DROP FUNCTION IF EXISTS diesel_manage_updated_at(_tbl regclass);
+DROP FUNCTION IF EXISTS diesel_set_updated_at();

migrations/00000000000000_diesel_initial_setup/up.sql

@@ -0,0 +1,36 @@
+-- This file was automatically created by Diesel to setup helper functions
+-- and other internal bookkeeping. This file is safe to edit, any future
+-- changes will be added to existing projects as new migrations.
+
+
+
+
+-- Sets up a trigger for the given table to automatically set a column called
+-- `updated_at` whenever the row is modified (unless `updated_at` was included
+-- in the modified columns)
+--
+-- # Example
+--
+-- ```sql
+-- CREATE TABLE users (id SERIAL PRIMARY KEY, updated_at TIMESTAMP NOT NULL DEFAULT NOW());
+--
+-- SELECT diesel_manage_updated_at('users');
+-- ```
+CREATE OR REPLACE FUNCTION diesel_manage_updated_at(_tbl regclass) RETURNS VOID AS $$
+BEGIN
+    EXECUTE format('CREATE TRIGGER set_updated_at BEFORE UPDATE ON %s
+                    FOR EACH ROW EXECUTE PROCEDURE diesel_set_updated_at()', _tbl);
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION diesel_set_updated_at() RETURNS trigger AS $$
+BEGIN
+    IF (
+        NEW IS DISTINCT FROM OLD AND
+        NEW.updated_at IS NOT DISTINCT FROM OLD.updated_at
+    ) THEN
+        NEW.updated_at := current_timestamp;
+    END IF;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;

migrations/2026-01-28-134347-0000_locations/down.sql

@@ -0,0 +1,2 @@
+DROP TABLE locations;
+DROP TYPE battery_status_enum CASCADE

migrations/2026-01-28-134347-0000_locations/up.sql

@@ -0,0 +1,18 @@
+CREATE TYPE battery_status_enum AS ENUM ('unknown', 'unplugged', 'charging', 'full');
+
+CREATE TABLE locations (
+    tst bigint PRIMARY KEY,
+    lat numeric(9,6) NOT NULL,
+    lon numeric(9,6) NOT NULL,
+    acc numeric(7,2) NOT NULL,
+    alt numeric(7,2),
+    vel numeric(7,2),
+    batt smallint NOT NULL,
+    bear numeric(6,3),
+    bs battery_status_enum DEFAULT 'unknown' NOT NULL,
+    CONSTRAINT Location_battery_level_check CHECK ((batt >= 0) AND (batt <= 100)),
+    CONSTRAINT Location_bearing_check CHECK ((bear >= (0)::numeric) AND (bear <= (360)::numeric))
+)
+WITH (oids = false);
+
+CREATE INDEX locations_timestamp ON locations USING btree (tst);

readme.md

@@ -0,0 +1,7 @@
+This is my first Rust project and it is not vibe-coded. It is spaghetti code at it's finest.
+The Server has no authentication, so local use only! Otherwise unauthenticated attackers have access to all location information.
+
+# Tech-Stack
+- Rust 
+- Diesel-Framework for Database connection
+- Postgresql to store location data

src/handlers.rs

@@ -0,0 +1,66 @@
+use crate::DbPool;
+use crate::{models::Location, schema::locations};
+use actix_web::{Error, HttpResponse, web};
+use diesel::pg::PgConnection;
+use diesel::prelude::*;
+use diesel::r2d2::{ConnectionManager, PooledConnection};
+use diesel::result::Error as DieselError;
+
+pub async fn index() -> Result<HttpResponse, Error> {
+    Ok(HttpResponse::Ok().json("Connection Successful"))
+}
+
+pub async fn create_location(
+    pool: web::Data<DbPool>,
+    body: web::Json<Location>,
+) -> Result<HttpResponse, Error> {
+    let location = body.into_inner();
+
+    web::block(move || {
+        let mut conn = get_connection(pool);
+
+        diesel::insert_into(locations::table)
+            .values(&location)
+            .execute(&mut conn)
+    })
+    .await
+    .map_err(|e| {
+        eprintln!("Block error: {:?}", e);
+        actix_web::error::ErrorInternalServerError("Block error")
+    })?
+    .map_err(|e: DieselError| {
+        eprintln!("Diesel error: {:?}", e);
+        if let DieselError::DatabaseError(kind, info) = &e {
+            eprintln!("DB Error Kind: {:?}", kind);
+            eprintln!("DB Error Info: {}", info.message());
+            if let Some(constraint) = info.constraint_name() {
+                eprintln!("Constraint: {}", constraint);
+            }
+        }
+        actix_web::error::ErrorInternalServerError(format!("DB error: {}", e))
+    })?;
+
+    Ok(HttpResponse::Created().json("Location created successfully"))
+}
+
+pub async fn select_locations(pool: web::Data<DbPool>) -> Result<HttpResponse, Error> {
+    
+    let locations = web::block(move || {
+        let mut conn = get_connection(pool);
+        locations::table
+            .select(Location::as_select())
+            .load::<Location>(&mut conn)
+    })
+    .await
+    .map_err(|_| actix_web::error::ErrorInternalServerError("Block error"))?
+    .map_err(|e: DieselError| {
+        eprintln!("Diesel SELECT error: {:?}", e);
+        actix_web::error::ErrorInternalServerError("DB query failed")
+    })?;
+
+    Ok(HttpResponse::Ok().json(&locations)) 
+}
+
+fn get_connection(pool: web::Data<DbPool>) -> PooledConnection<ConnectionManager<PgConnection>> {
+    pool.get().expect("Failed to get DB connection from pool")
+}

src/lib.rs

@@ -0,0 +1,23 @@
+use diesel::prelude::*;
+use dotenvy::dotenv;
+use std::{env};
+use diesel::r2d2::{ConnectionManager, Pool};
+
+pub mod models;
+pub mod schema;
+pub mod routes;
+pub mod handlers;
+
+pub type DbPool = Pool<ConnectionManager<PgConnection>>;
+
+pub fn create_pool() -> DbPool {
+    dotenv().ok();
+
+    let database_url = env::var("DATABASE_URL").expect("DATABASE_URL must be set");
+
+    let manager = ConnectionManager::<PgConnection>::new(database_url);
+
+    Pool::builder()
+        .build(manager)
+        .expect("Failed to create DB pool")
+}

src/main.rs

@@ -1,14 +1,19 @@
-use actix_web::{web, App, HttpRequest, HttpServer, Responder};
+use actix_web::{web, App, HttpServer};
-
+use colota_backend::{create_pool, DbPool};
-async fn index() -> impl Responder { "Connection successful" }
+pub use colota_backend::schema;
+pub use colota_backend::models;
+pub use colota_backend::routes;
 
 #[actix_web::main]
 async fn main() -> std::io::Result<()> {
-    HttpServer::new(|| {
+    let pool: DbPool = create_pool();
+
+    HttpServer::new(move || {
         App::new()
-            .service(web::resource("/").to(index))
+            .app_data(web::Data::new(pool.clone()))
+            .configure(routes::config_routes)
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("0.0.0.0", 8080))?
     .run()
     .await
 }

src/models.rs

@@ -0,0 +1,90 @@
+use bigdecimal::BigDecimal;
+use diesel::deserialize::{self, FromSql, FromSqlRow};
+use diesel::pg::{Pg, PgValue};
+use diesel::serialize::{IsNull, Output, ToSql};
+use diesel::*;
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+use std::io::Write;
+use diesel::expression::AsExpression;
+use crate::schema::sql_types::BatteryStatusEnum;
+
+
+#[derive(Queryable, Selectable, Insertable, Serialize, Deserialize, Debug)]
+#[diesel(table_name = crate::schema::locations)]
+#[diesel(check_for_backend(diesel::pg::Pg))]
+pub struct Location {
+  lat: BigDecimal,
+  lon: BigDecimal,
+  acc: BigDecimal,
+  alt: Option<BigDecimal>,
+  vel: Option<BigDecimal>,
+  batt: i16,
+  bs: BatteryStatus,
+  tst: i64,
+  bear: Option<BigDecimal>,
+}
+
+#[derive(Debug, FromSqlRow, AsExpression)]
+#[diesel(sql_type = BatteryStatusEnum)]
+pub enum BatteryStatus {
+    Unknown,
+    Unplugged,
+    Charging,
+    Full,
+}
+
+impl ToSql<BatteryStatusEnum, Pg> for BatteryStatus {
+    fn to_sql<'b>(&'b self, out: &mut Output<'b, '_, Pg>) -> serialize::Result {
+        match *self {
+            BatteryStatus::Unknown => out.write_all(b"unknown")?,
+            BatteryStatus::Unplugged => out.write_all(b"unplugged")?,
+            BatteryStatus::Charging => out.write_all(b"charging")?,
+            BatteryStatus::Full => out.write_all(b"full")?,
+        }
+        Ok(IsNull::No)
+    }
+}
+
+impl FromSql<BatteryStatusEnum, Pg> for BatteryStatus {
+    fn from_sql(bytes: PgValue<'_>) -> deserialize::Result<Self> {
+        match bytes.as_bytes() {
+            b"unknown" => Ok(BatteryStatus::Unknown),
+            b"unplugged" => Ok(BatteryStatus::Unplugged),
+            b"charging"=> Ok(BatteryStatus::Charging),
+            b"full"=> Ok(BatteryStatus::Full),
+            _ => Err("Unrecognized enum variant".into()),
+        }
+    }
+}
+
+// Custom JSON representation (if you want numbers in JSON)
+impl Serialize for BatteryStatus {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let code = match self {
+            BatteryStatus::Unknown   => 0,
+            BatteryStatus::Unplugged => 1,
+            BatteryStatus::Charging  => 2,
+            BatteryStatus::Full      => 3,
+        };
+        serializer.serialize_u8(code)
+    }
+}
+
+impl<'de> Deserialize<'de> for BatteryStatus {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: Deserializer<'de>,
+    {
+        let v = u8::deserialize(deserializer)?;
+        match v {
+            0 => Ok(BatteryStatus::Unknown),
+            1 => Ok(BatteryStatus::Unplugged),
+            2 => Ok(BatteryStatus::Charging),
+            3 => Ok(BatteryStatus::Full),
+            _ => Err(serde::de::Error::custom("invalid battery status code")),
+        }
+    }
+}

src/routes.rs

@@ -0,0 +1,8 @@
+use crate::handlers;
+use actix_web::web;
+
+pub fn config_routes(cfg: &mut web::ServiceConfig) {
+    cfg.service(web::resource("/api").route(web::get().to(handlers::index)))
+       .service(web::resource("/api/location").route(web::post().to(handlers::create_location)))
+       .service(web::resource("/api/locations").route(web::get().to(handlers::select_locations))); 
+}

src/schema.rs

@@ -0,0 +1,24 @@
+// @generated automatically by Diesel CLI.
+
+pub mod sql_types {
+    #[derive(diesel::query_builder::QueryId, Clone, diesel::sql_types::SqlType)]
+    #[diesel(postgres_type(name = "battery_status_enum"))]
+    pub struct BatteryStatusEnum;
+}
+
+diesel::table! {
+    use diesel::sql_types::*;
+    use super::sql_types::BatteryStatusEnum;
+
+    locations (tst) {
+        tst -> Int8,
+        lat -> Numeric,
+        lon -> Numeric,
+        acc -> Numeric,
+        alt -> Nullable<Numeric>,
+        vel -> Nullable<Numeric>,
+        batt -> Int2,
+        bear -> Nullable<Numeric>,
+        bs -> BatteryStatusEnum,
+    }
+}