Provide install and help commands for fields plugin

Closes gh-1291

Author: rainboyan

grace-plugin-fields/src/main/resources/META-INF/HELP

@@ -0,0 +1,9 @@
+# Fields
+
+Fields plugin provides customizable form-field rendering based on overrideable GSP template.
+
+```
+$ grace fields:install
+```
+
+Happy coding~~ 👨🏻‍💻

grace-plugin-fields/src/main/scripts/Help.groovy

@@ -0,0 +1,11 @@
+import grails.plugin.formfields.FieldsGrailsPlugin
+
+namespace 'fields'
+description "Print Help infromation for Fields", "grace fields:help"
+visible false
+
+URL url = FieldsGrailsPlugin.getResource('/META-INF/HELP')
+
+consoleLogger.addStatus "HELP"
+
+consoleLogger.log url.text

grace-plugin-fields/src/main/scripts/Install.groovy

@@ -0,0 +1,49 @@
+import java.nio.file.*
+import java.util.zip.ZipEntry
+import java.util.zip.ZipInputStream
+import grails.plugin.formfields.FieldsGrailsPlugin
+
+namespace 'fields'
+description "Install Fields", "grace fields:install"
+visible false
+
+URL url = FieldsGrailsPlugin.getResource('/META-INF/templates/_fields')
+File projectDir = executionContext.baseDir
+File viewsDir = new File(projectDir, 'app/views')
+File jarFile = new File(new URI(url.file.takeBefore('!')))
+
+use(FileCategory) {
+    jarFile.unzip(viewsDir, 'META-INF/templates/')
+}
+
+consoleLogger.addStatus "Copying the default templates to 'app/views'"
+
+
+class FileCategory {
+
+    def static unzip(File zipFile, File distDir, String path) {
+        ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFile))
+        ZipEntry entry
+
+        while (entry = zis.nextEntry) {
+            String fileName = entry.name
+            if (!fileName.startsWith(path)) {
+                continue
+            }
+            File file = new File(distDir, fileName - path)
+            if (fileName.endsWith('/')) {
+                if (file.isFile()) {
+                    file.delete()
+                }
+                file.mkdirs()
+            }
+            else {
+                Files.copy(zis, file.toPath(), StandardCopyOption.REPLACE_EXISTING)
+            }
+        }
+
+        zis.closeEntry()
+        zis.close()
+    }
+
+}

grace-plugin-fields/src/main/templates/_fields/_list.gsp

@@ -0,0 +1 @@
+<g:formatBoolean boolean="${value}"/>

grace-plugin-fields/src/main/templates/_fields/boolean/_displayWrapper.gsp

@@ -0,0 +1,4 @@
+<div class="custom-control-inline custom-control custom-switch">
+  <g:checkBox class="custom-control-input" id="${property}" name="${property}" value="${value}" />
+  <label class="custom-control-label" for="${property}">&nbsp;</label>
+</div>

grace-plugin-fields/src/main/templates/_fields/boolean/_widget.gsp

@@ -0,0 +1 @@
+<g:formatDate date="${value}" format="yyyy-MM-dd HH:mm"/>

grace-plugin-fields/src/main/templates/_fields/date/_displayWidget.gsp

@@ -0,0 +1 @@
+<g:formatDate date="${value}" format="yyyy-MM-dd HH:mm"/>

grace-plugin-fields/src/main/templates/_fields/date/_displayWrapper.gsp

@@ -0,0 +1,6 @@
+<div class="hstack gap-3">
+<g:datePicker name="${property}" value="${value ?: new Date()}"
+              precision="${attrs.precision}"
+              cssClasses="[year: 'form-select w-20', 'month': 'form-select w-20', 'day': 'form-select w-20', 'hour': 'form-select w-20', 'minute': 'form-select w-20']"
+              noSelection="['':'-Choose-']"/>
+</div>

grace-plugin-fields/src/main/templates/_fields/date/_widget.gsp

@@ -0,0 +1,9 @@
+<g:if test="${type in [Boolean, null]}">
+    <g:formatBoolean boolean="${value}"/>
+</g:if>
+<g:elseif test="${type in [Calendar, Date, java.sql.Date, java.sql.Time]}">
+    <g:formatDate date="${value}" format="yyyy-MM-dd HH:mm"/>
+</g:elseif>
+<g:else>
+    <g:fieldValue bean="${bean}" field="${property}"/>
+</g:else>