adding super naive html parsing for style options
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Adam Brown
parent
3517cf492a
commit
e13ce95b83
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package app.dapk.st.matrix.common
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import kotlinx.serialization.SerialName
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import kotlinx.serialization.Serializable
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@Serializable
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data class RichText(@SerialName("parts") val parts: Set<Part>) {
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@Serializable
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sealed interface Part {
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@Serializable
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data class Normal(@SerialName("content") val content: String) : Part
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data class Link(@SerialName("url") val url: String, @SerialName("label") val label: String) : Part
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data class Bold(@SerialName("content") val content: String) : Part
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data class Italic(@SerialName("content") val content: String) : Part
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data class BoldItalic(@SerialName("content") val content: String) : Part
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}
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}
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fun RichText.asString() = parts.joinToString(separator = "")
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package app.dapk.st.matrix.sync.internal.sync
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import app.dapk.st.matrix.common.RichText
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data class Tag(val name: String, val inner: String, val content: String)
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class RichMessageParser {
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fun parse(input: String): RichText {
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val buffer = mutableSetOf<RichText.Part>()
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var openIndex = 0
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var closeIndex = 0
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while (openIndex != -1) {
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val foundIndex = input.indexOf('<', startIndex = openIndex)
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if (foundIndex != -1) {
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closeIndex = input.indexOf('>', startIndex = openIndex)
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if (closeIndex == -1) {
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openIndex++
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} else {
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val wholeTag = input.substring(foundIndex, closeIndex + 1)
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val tagName = wholeTag.substring(1, wholeTag.indexOfFirst { it == '>' || it == ' ' })
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val exitTag = "<$tagName/>"
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val exitIndex = input.indexOf(exitTag, startIndex = closeIndex + 1)
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val tagContent = input.substring(closeIndex + 1, exitIndex)
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val tag = Tag(name = tagName, wholeTag, tagContent)
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println("found $tag")
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if (openIndex != foundIndex) {
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buffer.add(RichText.Part.Normal(input.substring(openIndex, foundIndex)))
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}
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openIndex = exitIndex + exitTag.length
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when (tagName) {
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"a" -> {
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val findHrefUrl = wholeTag.substringAfter("href=").replace("\"", "").removeSuffix(">")
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buffer.add(RichText.Part.Link(url = findHrefUrl, label = tag.content))
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}
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"b" -> buffer.add(RichText.Part.Bold(tagContent))
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"i" -> buffer.add(RichText.Part.Italic(tagContent))
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}
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}
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} else {
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// exit
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if (openIndex < input.length) {
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buffer.add(RichText.Part.Normal(input.substring(openIndex)))
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}
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break
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}
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}
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return RichText(buffer)
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}
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}
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package app.dapk.st.matrix.sync.internal.sync
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import app.dapk.st.matrix.common.RichText
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import org.amshove.kluent.shouldBeEqualTo
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import org.junit.Ignore
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import org.junit.Test
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class RichMessageParserTest {
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private val parser = RichMessageParser()
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@Test
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fun `parses plain text`() = runParserTest(
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input = "Hello world!",
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expected = RichText(setOf(RichText.Part.Normal("Hello world!")))
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)
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@Test
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fun `parses nested b tags`() = runParserTest(
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Case(
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input = """hello <b>wor<b/>ld""",
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expected = RichText(
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setOf(
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RichText.Part.Normal("hello "),
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RichText.Part.Bold("wor"),
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RichText.Part.Normal("ld"),
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)
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)
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),
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)
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@Test
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fun `parses nested i tags`() = runParserTest(
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Case(
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input = """hello <i>wor<i/>ld""",
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expected = RichText(
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setOf(
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RichText.Part.Normal("hello "),
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RichText.Part.Italic("wor"),
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RichText.Part.Normal("ld"),
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)
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)
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),
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)
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@Ignore // TODO
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@Test
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fun `parses nested tags`() = runParserTest(
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Case(
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input = """hello <b><i>wor<i/><b/>ld""",
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expected = RichText(
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setOf(
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RichText.Part.Normal("hello "),
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RichText.Part.BoldItalic("wor"),
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RichText.Part.Normal("ld"),
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)
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)
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),
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Case(
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input = """<a href="www.google.com"><a href="www.google.com">www.google.com<a/><a/>""",
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expected = RichText(
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setOf(
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RichText.Part.Link(url = "www.google.com", label = "www.google.com"),
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RichText.Part.Link(url = "www.bing.com", label = "www.bing.com"),
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)
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)
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)
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)
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@Test
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fun `parses 'a' tags`() = runParserTest(
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Case(
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input = """hello world <a href="www.google.com">a link!<a/> more content.""",
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expected = RichText(
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setOf(
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RichText.Part.Normal("hello world "),
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RichText.Part.Link(url = "www.google.com", label = "a link!"),
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RichText.Part.Normal(" more content."),
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)
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)
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),
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Case(
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input = """<a href="www.google.com">www.google.com<a/><a href="www.bing.com">www.bing.com<a/>""",
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expected = RichText(
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setOf(
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RichText.Part.Link(url = "www.google.com", label = "www.google.com"),
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RichText.Part.Link(url = "www.bing.com", label = "www.bing.com"),
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)
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)
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),
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)
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private fun runParserTest(vararg cases: Case) {
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val errors = mutableListOf<Throwable>()
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cases.forEach {
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runCatching { runParserTest(it.input, it.expected) }.onFailure { errors.add(it) }
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}
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if (errors.isNotEmpty()) {
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throw CompositeThrowable(errors)
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}
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}
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private fun runParserTest(input: String, expected: RichText) {
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val result = parser.parse(input)
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result shouldBeEqualTo expected
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}
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}
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private data class Case(val input: String, val expected: RichText)
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class CompositeThrowable(inner: List<Throwable>) : Throwable() {
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init {
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inner.forEach { addSuppressed(it) }
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}
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}
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