希望在Content API中提供通过themeId查询主题信息及配置的接口

[fuzui]

Your current Halo version

1.4.17

Describe this feature

目前Content API中仅能够查询当前使用的主题的信息及配置。
因如果我想在其他端（例如APP、小程序）中能够通过后台灵活配置一些参数，但我仍不想放弃我当前在web端正在使用的主题。
目前能想到的便是通过拉取一个特有主题来获取其配置，但在后台仅仅只是配置它，并不启用它。

Additional information

No response

[JohnNiang]

@fuzui Thanks for reaching out here. We will consider your request in Halo 1.5.x.

/kind feature

[JohnNiang]

这里我提供一下实现思路，希望有兴趣的朋友能够根据该思路达成参与 Halo 的成就。

思路

实现“根据 themeId 获取主题信息及配置信息”接口

halo/src/main/java/run/halo/app/controller/content/api/ThemeController.java

Lines 19 to 42 in d961a5e

	@RequestMapping("/api/content/themes")
	public class ThemeController {
	private final ThemeService themeService;
	private final ThemeSettingService themeSettingService;
	public ThemeController(ThemeService themeService, ThemeSettingService themeSettingService) {
	this.themeService = themeService;
	this.themeSettingService = themeSettingService;
	}
	@GetMapping("activation")
	@ApiOperation("Gets activated theme property")
	public ThemeProperty getBy() {
	return themeService.getThemeOfNonNullBy(themeService.getActivatedThemeId());
	}
	@GetMapping("activation/settings")
	@ApiOperation("Lists activated theme settings")
	public Map<String, Object> listSettingsBy() {
	return themeSettingService.listAsMapBy(themeService.getActivatedThemeId());
	}
	}

实现过程中，可能需要通过以下服务来获取主题详情：

halo/src/main/java/run/halo/app/service/ThemeService.java

Line 61 in d961a5e

ThemeProperty getThemeOfNonNullBy(@NonNull String themeId);

[ruibaby]

/assign @guqing