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Initial project setup: Clojure Kit web app for BTC price tracking

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Kit framework with Undertow, Reitit routing, Hiccup + HTMX templating,
Tailwind CSS v4, PostgreSQL (empty database), and mobile-first index page.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
magnus
2026-02-17 14:50:42 +01:00
co-authored by Claude Opus 4.6
commit f7b571f670
38 changed files with 1756 additions and 0 deletions
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.gitignore
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/target
/classes
/checkouts
profiles.clj
pom.xml
pom.xml.asc
*.jar
*.class
/.lein-*
/.nrepl-port
/.cpcache
/.clj-kondo
/node_modules
/log
.DS_Store
*.log
/.env
/token
CLAUDE.md
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# btcprice
Bitcoin price tracker - Clojure Kit web application.
## Build & Development Commands
- `make run` — Start dev server on port 3000
- `make repl` — Start nREPL on port 7888
- `make test` — Run tests
- `make tailwind` — Watch Tailwind CSS for changes
- `make uberjar` — Build production JAR
- `docker compose up -d` — Start PostgreSQL
## REPL Commands
```clojure
(dev-prep!) ;; Prepare dev system
(go) ;; Start system
(reset) ;; Reload code & restart
(halt) ;; Stop system
(reset-db) ;; Drop & re-migrate database
(migrate) ;; Run pending migrations
(rollback) ;; Rollback last migration
(query-fn) ;; Get database query function
```
## Architecture
- **Framework:** Kit (Integrant-based)
- **Server:** Undertow
- **Routing:** Reitit
- **Templates:** Hiccup + HTMX
- **Styling:** Tailwind CSS v4
- **Database:** PostgreSQL + conman + Migratus
## Source Layout
```
src/clj/pmagnus/btcprice/
├── core.clj # App entry point
├── config.clj # System config loader
└── web/
├── handler.clj # Ring handler + routes
├── htmx.clj # page/fragment macros
├── controllers/
│ └── health.clj # Health check
├── middleware/
│ ├── core.clj # Base middleware
│ ├── exception.clj # Exception handling
│ └── formats.clj # Content negotiation
└── routes/
├── api.clj # /api routes (JSON)
├── ui.clj # UI routes (HTML)
└── utils.clj # Route utilities
```
Dockerfile
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FROM clojure:openjdk-25 AS build
WORKDIR /build
COPY . .
RUN clj -Sforce -T:build all
FROM azul/zulu-openjdk-alpine:25
COPY --from=build /build/target/btcprice-standalone.jar /btcprice/btcprice-standalone.jar
EXPOSE 4040
CMD ["java", "-jar", "/btcprice/btcprice-standalone.jar"]
Makefile
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.PHONY: clean run repl tailwind test uberjar
clean:
rm -rf target
run:
clj -M:dev -e "(dev-prep!) (go)" -r
repl:
clj -M:dev:nrepl
tailwind:
npm run css:watch
test:
clj -M:test
uberjar:
clj -T:build all
bb.edn
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{:tasks
{:run {:doc "Start dev server"
:task (shell "clj -M:dev")}
:nrepl {:doc "Start nREPL"
:task (shell "clj -M:dev:nrepl")}
:cider {:doc "Start CIDER"
:task (shell "clj -M:dev:cider")}
:test {:doc "Run tests"
:task (shell "clj -M:test")}
:uberjar {:doc "Build uberjar"
:task (shell "clj -T:build all")}
:format {:doc "Format code"
:task (shell "clj -M:dev -m cljstyle.main fix src test")}}}
build.clj
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(ns build
(:require [clojure.tools.build.api :as b]))
(def lib 'pmagnus/btcprice)
(def version "0.0.1-SNAPSHOT")
(def target-dir "target")
(def class-dir (str target-dir "/classes"))
(def basis (delay (b/create-basis {:project "deps.edn"})))
(def uber-file (str target-dir "/btcprice-standalone.jar"))
(defn clean [_]
(b/delete {:path target-dir}))
(defn uber [_]
(clean nil)
(b/copy-dir {:src-dirs ["src/clj" "resources" "env/prod/resources" "env/prod/clj"]
:target-dir class-dir})
(b/compile-clj {:basis @basis
:ns-compile '[pmagnus.btcprice.core]
:class-dir class-dir})
(b/uber {:class-dir class-dir
:uber-file uber-file
:basis @basis
:main 'pmagnus.btcprice.core}))
(defn all [_]
(uber nil))
deps.edn
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{:paths ["src/clj" "resources"]
:deps {org.clojure/clojure {:mvn/version "1.12.3"}
org.clojure/data.json {:mvn/version "2.5.1"}
;; Kit
io.github.kit-clj/kit-core {:mvn/version "1.0.6"}
;; Logging
ch.qos.logback/logback-classic {:mvn/version "1.5.20"}
;; HTTP Server
io.github.kit-clj/kit-undertow {:mvn/version "1.0.10"}
;; Routing
metosin/reitit {:mvn/version "0.9.2"}
metosin/reitit-ring {:mvn/version "0.9.2"}
metosin/reitit-middleware {:mvn/version "0.9.2"}
metosin/reitit-swagger {:mvn/version "0.9.2"}
metosin/reitit-swagger-ui {:mvn/version "0.9.2"}
metosin/reitit-malli {:mvn/version "0.9.2"}
;; Web
ring/ring-core {:mvn/version "1.15.3"}
ring/ring-defaults {:mvn/version "0.7.0"}
metosin/ring-http-response {:mvn/version "0.9.5"}
hiccup/hiccup {:mvn/version "2.0.0"}
;; Serialization
metosin/muuntaja {:mvn/version "0.6.11"}
luminus-transit/luminus-transit {:mvn/version "0.1.6"}
;; Database
io.github.kit-clj/kit-postgres {:mvn/version "1.0.7"}
io.github.kit-clj/kit-sql-conman {:mvn/version "1.10.5"}
io.github.kit-clj/kit-sql-migratus {:mvn/version "1.0.5"}}
:aliases
{:build {:deps {io.github.clojure/tools.build {:mvn/version "0.10.9"}}
:ns-default build}
:dev {:extra-paths ["env/dev/clj" "env/dev/resources" "test/clj"]
:extra-deps {integrant/repl {:mvn/version "0.4.0"}
criterium/criterium {:mvn/version "0.4.6"}
expound/expound {:mvn/version "0.9.0"}
com.lambdaisland/classpath {:mvn/version "0.4.44"}
ring/ring-devel {:mvn/version "1.15.3"}}}
:test {:extra-paths ["env/test/resources"]
:extra-deps {io.github.cognitect-labs/test-runner {:git/tag "v0.5.1" :git/sha "dfb30dd"}
peridot/peridot {:mvn/version "0.5.4"}
clj-commons/byte-streams {:mvn/version "0.3.4"}}
:main-opts ["-m" "cognitect.test-runner"]
:exec-fn cognitect.test-runner.api/test}
:nrepl {:extra-deps {nrepl/nrepl {:mvn/version "1.3.1"}}
:main-opts ["-m" "nrepl.cmdline"
"--middleware" "[integrant.repl/middleware]"]}
:cider {:extra-deps {cider/cider-nrepl {:mvn/version "0.55.7"}}
:main-opts ["-m" "nrepl.cmdline"
"--middleware" "[cider.nrepl/cider-middleware]"]}}}
env/dev/clj/pmagnus/btcprice/dev_middleware.clj
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(ns pmagnus.btcprice.dev-middleware)
(defn wrap-dev [handler _opts]
handler)
env/dev/clj/pmagnus/btcprice/env.clj
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(ns pmagnus.btcprice.env
(:require
[clojure.tools.logging :as log]
[pmagnus.btcprice.dev-middleware :refer [wrap-dev]]))
(def defaults
{:init (fn [] (log/info "\n-=[btcprice starting...dev/test profile]=-"))
:start (fn [] (log/info "\n-=[btcprice started...dev/test profile]=-"))
:stop (fn [] (log/info "\n-=[btcprice has shut down]=-"))
:middleware wrap-dev
:opts {:profile :dev}})
env/dev/clj/user.clj
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(ns user
(:require
[clojure.tools.logging :as log]
[integrant.core :as ig]
[integrant.repl :refer [go halt reset reset-all set-prep!]]
[pmagnus.btcprice.config :as config]))
(defn dev-prep! []
(set-prep!
(fn []
(-> (config/system-config {:profile :dev})
(ig/prep)))))
(defn test-prep! []
(set-prep!
(fn []
(-> (config/system-config {:profile :test})
(ig/prep)))))
(defn reset-db []
(let [sys (or @pmagnus.btcprice.core/system
integrant.repl.state/system)]
(when-let [mig (:db.sql/migrations sys)]
(migratus.core/reset mig)
(log/info "Database reset complete"))))
(defn rollback []
(let [sys (or @pmagnus.btcprice.core/system
integrant.repl.state/system)]
(when-let [mig (:db.sql/migrations sys)]
(migratus.core/rollback mig))))
(defn migrate []
(let [sys (or @pmagnus.btcprice.core/system
integrant.repl.state/system)]
(when-let [mig (:db.sql/migrations sys)]
(migratus.core/migrate mig))))
(defn query-fn []
(let [sys (or @pmagnus.btcprice.core/system
integrant.repl.state/system)]
(:db.sql/query-fn sys)))
(comment
(dev-prep!)
(go)
(reset)
(halt))
env/dev/resources/logback.xml
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<configuration>
<statusListener class="ch.qos.logback.core.status.NopStatusListener" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
<logger name="pmagnus.btcprice" level="DEBUG" />
<logger name="org.eclipse.jetty" level="WARN" />
<logger name="io.undertow" level="WARN" />
<logger name="org.xnio" level="WARN" />
</configuration>
env/prod/clj/pmagnus/btcprice/env.clj
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(ns pmagnus.btcprice.env
(:require
[clojure.tools.logging :as log]))
(def defaults
{:init (fn [] (log/info "\n-=[btcprice starting]=-"))
:start (fn [] (log/info "\n-=[btcprice started successfully]=-"))
:stop (fn [] (log/info "\n-=[btcprice has shut down successfully]=-"))
:middleware (fn [handler _] handler)
:opts {:profile :prod}})
env/prod/resources/logback.xml
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<configuration>
<statusListener class="ch.qos.logback.core.status.NopStatusListener" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
<logger name="org.eclipse.jetty" level="WARN" />
<logger name="io.undertow" level="WARN" />
<logger name="org.xnio" level="WARN" />
</configuration>
env/test/resources/logback.xml
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<configuration>
<statusListener class="ch.qos.logback.core.status.NopStatusListener" />
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
</encoder>
</appender>
<root level="ERROR">
<appender-ref ref="STDOUT" />
</root>
</configuration>
kit.edn
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{:full-name "pmagnus/btcprice"
:ns-name "pmagnus.btcprice"
:sanitized "pmagnus/btcprice"
:name "btcprice"
:modules {:root "modules"
:repositories [{:url "https://github.com/kit-clj/modules.git"
:tag "master"
:name "kit-modules"}]}}
modules/install-log.edn
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{}
package-lock.json
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package.json
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{
"name": "btcprice",
"version": "0.0.1",
"private": true,
"scripts": {
"css:build": "npx @tailwindcss/cli -i resources/css/input.css -o resources/public/css/output.css --minify",
"css:watch": "npx @tailwindcss/cli -i resources/css/input.css -o resources/public/css/output.css --watch"
},
"devDependencies": {
"@tailwindcss/cli": "^4.1.18",
"tailwindcss": "^4.1.18"
}
}
resources/css/input.css
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@import "tailwindcss";
@source "../../src/**/*.clj";
resources/migrations/placeholder.txt
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Migration files go here.
resources/public/css/output.css
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resources/queries.sql
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-- queries for btcprice
-- Add HugSQL queries here as tables are created
resources/system.edn
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{:system/env #profile {:dev :dev :test :test :prod :prod}
:server/http
{:port #long #or [#env PORT 4000]
:host #or [#env HTTP_HOST "0.0.0.0"]
:handler #ig/ref :handler/ring}
:handler/ring
{:router #ig/ref :router/core
:api-path "/api"
:site-defaults-config
{:params {:keywordize true
:multipart true
:nested true}
:cookies true
:session {:flash true
:cookie-attrs {:http-only true
:same-site :strict}}
:security {:anti-forgery false
:xss-protection {:enable? true :mode :block}
:frame-options :sameorigin}
:static {:resources "public"}
:responses {:not-modified-responses true
:absolute-redirects true
:content-types true
:default-charset "utf-8"}}}
:router/routes
{:routes #ig/refset :reitit/routes}
:router/core
{:routes #ig/ref :router/routes
:env #ig/ref :system/env}
:db.sql/connection
#profile {:dev {:jdbc-url "jdbc:postgresql://localhost:5432/btcprice?user=btcprice&password=btcprice"}
:test {:jdbc-url "jdbc:postgresql://localhost:5432/btcprice?user=btcprice&password=btcprice"}
:prod {:jdbc-url #env JDBC_URL
:init-size 1
:min-idle 1
:max-idle 8
:max-active 32}}
:db.sql/query-fn
{:conn #ig/ref :db.sql/connection
:options {}
:filename "queries.sql"}
:db.sql/migrations
{:store :database
:db {:datasource #ig/ref :db.sql/connection}
:migrate-on-init? true}
:reitit.routes/api
{:base-path "/api"
:query-fn #ig/ref :db.sql/query-fn}
:reitit.routes/ui
{:base-path ""
:query-fn #ig/ref :db.sql/query-fn}}
src/clj/pmagnus/btcprice/config.clj
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(ns pmagnus.btcprice.config
(:require
[kit.config :as config]))
(def ^:const system-filename "system.edn")
(defn system-config [options]
(config/read-config system-filename options))
src/clj/pmagnus/btcprice/core.clj
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(ns pmagnus.btcprice.core
(:require
[clojure.tools.logging :as log]
[integrant.core :as ig]
[pmagnus.btcprice.config :as config]
[pmagnus.btcprice.env :refer [defaults]]
;; Edges
[kit.edge.db.postgres]
[kit.edge.db.sql.conman]
[kit.edge.db.sql.migratus]
[kit.edge.server.undertow])
(:gen-class))
(defonce system (atom nil))
(defn stop-app []
((or (:stop defaults) (fn [])))
(some-> (deref system) (ig/halt!))
(shutdown-agents))
(defn start-app [& [params]]
((or (:init defaults) (fn [])))
(->> (config/system-config (or params {}))
(ig/prep)
(ig/init)
(reset! system))
((or (:start defaults) (fn []))))
(defn -main [& _]
(Thread/setDefaultUncaughtExceptionHandler
(reify Thread$UncaughtExceptionHandler
(uncaughtException [_ _thread ex]
(log/error ex "Uncaught exception"))))
(start-app)
(.addShutdownHook (Runtime/getRuntime) (Thread. stop-app)))
src/clj/pmagnus/btcprice/web/controllers/health.clj
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(ns pmagnus.btcprice.web.controllers.health
(:require
[ring.util.http-response :as response])
(:import
[java.lang.management ManagementFactory]))
(defn healthcheck! [_req]
(response/ok
{:time (str (java.time.Instant/now))
:up-time (.. ManagementFactory getRuntimeMXBean getUptime)
:app {:status "up"}}))
src/clj/pmagnus/btcprice/web/handler.clj
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(ns pmagnus.btcprice.web.handler
(:require
[integrant.core :as ig]
[reitit.ring :as ring]
[pmagnus.btcprice.web.middleware.core :as middleware]))
(defmethod ig/init-key :handler/ring
[_ {:keys [router api-path] :as opts}]
(ring/ring-handler
(router)
(ring/routes
(ring/create-resource-handler {:path "/"})
(when (some? api-path)
(reitit.ring/create-default-handler))
(ring/create-default-handler
{:not-found (constantly {:status 404 :body "Page not found"})
:method-not-allowed (constantly {:status 405 :body "Not allowed"})
:not-acceptable (constantly {:status 406 :body "Not acceptable"})}))
{:middleware [(middleware/wrap-base opts)]}))
(defmethod ig/init-key :router/routes
[_ {:keys [routes]}]
(mapv (fn [route]
(if (fn? route) (route) route))
routes))
(defmethod ig/init-key :router/core
[_ {:keys [routes env]}]
(if (= env :dev)
(fn [] (ring/router routes))
(constantly (ring/router routes))))
src/clj/pmagnus/btcprice/web/htmx.clj
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(ns pmagnus.btcprice.web.htmx
(:require
[hiccup2.core :as h]))
(defmacro page
[opts & content]
`(let [opts# ~opts]
{:status 200
:headers {"Content-Type" "text/html; charset=utf-8"}
:body (str
(h/html
(hiccup2.core/raw "<!DOCTYPE html>")
[:html {:lang (or (:lang opts#) "en")}
[:head
[:meta {:charset "utf-8"}]
[:meta {:name "viewport" :content "width=device-width, initial-scale=1"}]
[:meta {:name "apple-mobile-web-app-capable" :content "yes"}]
[:meta {:name "apple-mobile-web-app-status-bar-style" :content "black-translucent"}]
[:title (or (:title opts#) "BTC Price")]
[:link {:rel "stylesheet" :href "/css/output.css"}]
[:script {:src "https://unpkg.com/htmx.org@2.0.8"}]]
[:body
[:div.mx-auto.max-w-lg.px-4.py-6
~@content]]]))}))
(defmacro fragment
[opts & content]
`(let [_opts# ~opts]
{:status 200
:headers {"Content-Type" "text/html; charset=utf-8"}
:body (str (h/html ~@content))}))
src/clj/pmagnus/btcprice/web/middleware/core.clj
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(ns pmagnus.btcprice.web.middleware.core
(:require
[ring.middleware.defaults :as defaults]))
(defn wrap-base [{:keys [site-defaults-config]}]
(fn [handler]
(cond-> handler
true (defaults/wrap-defaults
(or site-defaults-config defaults/site-defaults)))))
src/clj/pmagnus/btcprice/web/middleware/exception.clj
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(ns pmagnus.btcprice.web.middleware.exception
(:require
[clojure.tools.logging :as log]
[reitit.ring.middleware.exception :as exception]))
(defn- handler [message exception request]
(let [uri (:uri request)]
(log/error exception (str message " at " uri))
{:status 500
:body {:message message
:exception (.getClass exception)
:data (ex-data exception)
:uri uri}}))
(def exception-middleware
(exception/create-exception-middleware
(merge
exception/default-handlers
{::exception/default (partial handler "Internal error")
::exception/wrap (fn [handler e request]
(handler e request))})))
src/clj/pmagnus/btcprice/web/middleware/formats.clj
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(ns pmagnus.btcprice.web.middleware.formats
(:require
[luminus-transit.time :as time]
[muuntaja.core :as m]))
(def instance
(m/create
(-> m/default-options
(update-in [:formats "application/transit+json" :decoder-opts]
(partial merge time/time-deserialization-handlers))
(update-in [:formats "application/transit+json" :encoder-opts]
(partial merge time/time-serialization-handlers)))))
src/clj/pmagnus/btcprice/web/routes/api.clj
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(ns pmagnus.btcprice.web.routes.api
(:require
[integrant.core :as ig]
[pmagnus.btcprice.web.controllers.health :as health]
[pmagnus.btcprice.web.middleware.exception :as exception]
[pmagnus.btcprice.web.middleware.formats :as formats]
[reitit.coercion.malli :as malli]
[reitit.ring.coercion :as coercion]
[reitit.ring.middleware.muuntaja :as muuntaja]
[reitit.ring.middleware.parameters :as parameters]
[reitit.swagger :as swagger]
[reitit.swagger-ui :as swagger-ui]))
(defn- api-routes [_opts]
[["/swagger.json"
{:get {:no-doc true
:swagger {:info {:title "btcprice API"}}
:handler (swagger/create-swagger-handler)}}]
["/health"
{:get health/healthcheck!}]])
(defn route-data [opts]
(merge
opts
{:coercion malli/coercion
:muuntaja formats/instance
:swagger {:id ::api}
:middleware [parameters/parameters-middleware
muuntaja/format-negotiate-middleware
muuntaja/format-response-middleware
exception/exception-middleware
muuntaja/format-request-middleware
coercion/coerce-request-middleware
coercion/coerce-response-middleware]}))
(derive :reitit.routes/api :reitit/routes)
(defmethod ig/init-key :reitit.routes/api
[_ {:keys [base-path]
:or {base-path ""}
:as opts}]
[base-path (route-data opts) (api-routes opts)])
src/clj/pmagnus/btcprice/web/routes/ui.clj
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(ns pmagnus.btcprice.web.routes.ui
(:require
[integrant.core :as ig]
[pmagnus.btcprice.web.htmx :refer [page]]
[pmagnus.btcprice.web.middleware.exception :as exception]
[pmagnus.btcprice.web.middleware.formats :as formats]
[reitit.ring.middleware.muuntaja :as muuntaja]
[reitit.ring.middleware.parameters :as parameters]))
(defn home-page [_req]
(page {:title "BTC Price"}
[:header.text-center.mb-8
[:h1.text-3xl.font-bold.text-gray-900 "BTC Price"]
[:p.text-sm.text-gray-500.mt-1 "Bitcoin price tracker"]]
[:div#price-panel.space-y-4
[:div.bg-white.rounded-2xl.shadow-sm.border.border-gray-200.p-6
[:p.text-center.text-gray-400.text-sm "Loading..."]]]))
(defn- ui-routes [_opts]
[["/"
{:get home-page}]])
(defn route-data [opts]
(merge
opts
{:muuntaja formats/instance
:middleware [parameters/parameters-middleware
muuntaja/format-response-middleware
exception/exception-middleware]}))
(derive :reitit.routes/ui :reitit/routes)
(defmethod ig/init-key :reitit.routes/ui
[_ {:keys [base-path]
:or {base-path ""}
:as opts}]
[base-path (route-data opts) (ui-routes opts)])
src/clj/pmagnus/btcprice/web/routes/utils.clj
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(ns pmagnus.btcprice.web.routes.utils)
(def route-data-path [:reitit.core/match :data])
(defn route-data [req]
(get-in req route-data-path))
(defn route-data-key [req k]
(get (route-data req) k))
tailwind.config.js
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module.exports = {
content: ["./src/**/*.clj", "./resources/**/*.html"],
theme: { extend: {} },
plugins: []
}
test/clj/pmagnus/btcprice/core_test.clj
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(ns pmagnus.btcprice.core-test
(:require
[clojure.test :refer [deftest is]]))
(deftest app-loads-test
(is (= 1 1)))
test/clj/pmagnus/btcprice/test_utils.clj
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(ns pmagnus.btcprice.test-utils
(:require
[integrant.core :as ig]
[integrant.repl.state :as state]
[pmagnus.btcprice.config :as config]
[pmagnus.btcprice.core :as core]))
(defn system-state []
(or @core/system state/system))
(defn system-fixture []
(fn [f]
(let [system (-> (config/system-config {:profile :test})
(ig/prep)
(ig/init))]
(reset! core/system system)
(try
(f)
(finally
(ig/halt! system)
(reset! core/system nil))))))
test/clj/pmagnus/btcprice/web/request_test.clj
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(ns pmagnus.btcprice.web.request-test
(:require
[clojure.test :refer [deftest is use-fixtures]]
[pmagnus.btcprice.test-utils :as tu]))
(use-fixtures :once (tu/system-fixture))
(deftest health-request-test
(let [sys (tu/system-state)
app (get sys :handler/ring)]
(when app
(let [resp (app {:request-method :get :uri "/api/health"})]
(is (= 200 (:status resp)))))))